HP COMPAQ PROLIANT 5000 SERVER User Manual

April 1996

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Prepared by Systems Division

Compaq Computer Corporation

ONTENTS

C

Leading in the Dist ribute d Ent e rprise

New Compaq ProLiant 5000

Database Performanc e File Server Performance ProLiant 4500 Comparison Competitive C omparison

Balance d Performa nc e

Processor Memory I/O Architecture

High-Availability

Single-System Availability Compaq Server Arrays Ensuring Tested Trans itions

Investment Prot ection

Pa rtne rshi ps for Integration and Compatibility

Microsoft Novell Oracle Compaq SmartStart Compaq Insight M anager

Global S e rvice a nd Support

Conclus ion

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11

12

12 13 14

15

16

16 16 16 16 17

17

18

W

.

Compaq Pentium Pro Processor-Based Servers: New

.

Possibilities For The Distributed Enterprise

.

E

.

The computing industry is at the threshold of a new generation of multiprocessing servers based

.

on the new Intel Pentium Pro processor. Leveraging seven years of server expertise, Compaq is

.

introducing a new breakthrough platform for the distributed enterprise: the Compaq ProLiant

.

5000, offering midrange-class performance and reliability.

.

Compared to its predecessor, the new Compaq ProLiant 5000 has

.

3

.

Customers currently deploying business-critical database applications or doing file server

.

consolidation on a ProLiant 4500 should consider a relatively quick transition to the ProLiant

.

4

.

5000 based on its superior performance and value; most customers should shift to Pentium Pro

.

4

.

processor-based systems by September, 1996. In addition, customers who are transitioning from

.

5

.

Pentium to Pentium Pro processor-based servers should also strongly consider transitioning from

.

6

.

EISA to PCI peripherals to take full advantage of the ProLiant 5000 I/O performance capabilities.

.

7

.

By designing its own Pentium Pro processor-based servers, Compaq is delivering industry-

.

standard platforms that will meet the needs of the distributed enterprise:

.

8

.

8

.

9

.

9

.

High-availability and reliability are key for trusting a platform to run your business-critical

.

applications. A few examples of Compaq’s attention to detail in these new systems are

.

These and many other features make the new Compaq ProLiant 5000—and future Pentium Pro

.

processor-based servers to be introduced later in 1996—ideal for running business-critical

.

applications in either the department or the data center.

.

HITE

XECUTIVE SUMMARY

30% to 50% greater database performance, and

•

25% to 40% greater file server performance.

•

midrange-level performance of 5676 tpmC supported by up to 4GB

•

the industry’s best price:performance of $136 per tpmC,

•

the high-availability and reliability required for business-critical applications—including

•

clustering solutions, comprehensive investment protection programs for Compaq servers, especially backward

•

compatibility with the large installed base of Compaq rack-mountable servers robust platform integration and manageability, and

•

systems-class service and support.

•

redundant Netelligent network interface controllers (NICs) that eliminate the network

•

adapter as a single point of failure, N+1 redundant Processor Power Modules that guarantee power to each individual

•

Pentium Pro processor even if one Processor Power Module fails, an expansion of the Compaq Pre-Failure Warranty to include Pentium Pro processors,

•

optimized system signal path and air flow routing that ensures highly reliable operation

•

under the heaviest loading conditions, On-Line Capacity Expansion with the SMART-2 Array Controller that allows storage

•

capacity to be added to an existing RAID configuration without taking the server offline, the new Compaq DLT Array that can back up over 200GB of data in under five hours

•

with full RAID 5 protection, clustering solutions that deliver cost-effective high-availability for both file/print and

•

database applications, and high levels of operating system, database, and management integration through Compaq

•

SmartStart and Insight Manager.

P

A PER

1

of system memory,

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OTICE

N

.

The information in this publication is subject to change without notice.

.

COMPAQ CO MPUTER CORPORATION SHALL NO T BE LIABLE FOR

.

TECHNICAL OR EDIT ORIAL ERRORS OR OMISSIONS CO NTAINED

.

HEREIN, NO R FOR INCIDENTAL O R CONSEQUENTIAL DAMAGES

.

RESULTING FROM T HE FURNISHING, PERFORMANCE, O R USE OF

.

THIS MATERIAL. THIS INFORMATION IS PROVIDED “AS IS” AND

.

COMPAQ M AKES NO REPSENTATIONS OR WARRANTIE S OF ANY

.

KIND, EXPRESS, IM PLIED OR STATUTORY, AND EXPRESSL Y

.

DISLCAIMS THE IM LIED WARRANTIES OF MERCHANTAB ILITY,

.

FITNESS FOR PARTICULAR PURPOSE, GOOD TITLE AND

.

NONINFRINGEMENT

.

This publication does not constitute an endorsement of the product or products that were tested.

.

The configuration or configurations tested or described may or may not be the only available

.

solution. This test is not a determination of product quality or correctness, nor does it ensure

.

compliance with any federal, state or local requirements. Compaq does not warrant products

.

other than its own strictly as stated in Compaq product warranties.

.

Product names mentioned herein may be trademarks and/or registered trademarks of their

.

respective companies.

.

Compaq, Contura, Deskpro, Fastart, Compaq Insight Manager, LTE, PageMarq, Systempro,

.

Systempro/LT, ProLiant, TwinTray, LicensePaq, QVision, SLT, ProLinea, SmartStart, NetFlex,

.

DirectPlus, QuickFind, RemotePaq, BackPaq, TechPaq, SpeedPaq, QuickBack, PaqFax,

.

registered United States Patent and Trademark Office.

.

Aero, Concerto, QuickChoice, ProSignia, Systempro/XL, Net1, SilentCool, LTE Elite, Presario,

.

SmartStation, MiniStation, Vocalyst, PageMate, SoftPaq, FirstPaq, SolutionPaq, EasyPoint, EZ

.

Help, MaxLight, MultiLock, QuickBlank, QuickLock, UltraView, CompaqCare and the Innovate

.

logo are trademarks and/or service marks of Compaq Computer Corporation.

.

Other product names mentioned herein may be trademarks and/or registered trademarks of their

.

respective companies.

.

Microsoft, Windows, Win32, Windows NT, Windows NT Server, SQL Server for Windows NT

.

and BackOffice are trademarks and/or registered trademarks of Microsoft Corporation.

.

2

(cont’d)

.

“Lyondell Petrochemicals selected the Compaq SAP R/3 solution running Microsoft Windows NT Server and Microsoft SQL Server 6.0 because it offered the best

price:performance and the ultimate flexibility of an industry-standard systems environment,” said Randy Lewis, Director of IS for Lyondell Petrochemicals. Lewis continued, “We are now in full production with this configuration and are very impressed with its stability and performance. Lyondell values the relationship between Compaq, SAP and Microsoft, and trusts them to continue delivering valuable solutions for our enterprise computing requirements.”

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EADING IN THE DISTRIBUTED ENTERPRISE

L

.

There is a revolution in business computing as corporations move their operations to a

.

decentralized business and computing environment. These business and technological changes

.

are driving the convergence of the centralized and distributed computing models.

.

Compaq has pioneered this

.

infrastructure that delivers instant access to business-critical data and empowers decision-makers.

.

In 1989 Compaq introduced the first industry-standard, multiprocessing x86 server, the Compaq

.

Systempro. Soon after, in 1991, Compaq created the Compaq Systems Division to focus

.

specifically on industry-standard server innovation. And in 1994, Compaq reinforced its

.

commitment to serving the needs of corporate MIS by delivering the industry’s first rack-

.

mountable x86-based servers that targeted the needs of customers deploying and consolidating

.

servers in the data center.

.

Because Compaq continues to challenge traditional midrange computing paradigms, many

.

customers are presently migrating their business-critical applications from proprietary RISC-

.

based systems to industry-standard x86-based Compaq servers:

.

3

•

For example, TPC-C results published earlier this year for the Pentium processor-based Compaq ProLiant 4500 5/166 clearly demonstrate that x86-based servers deliver midrange-class transaction processing performance for a total cost of ownership less than that of traditional midrange systems that were available at the time:

TPC-C Throughput Price:Performance

Total System Cost Number of Processors

With almost triple the worldwide server market share of the nearest competitor in 1995,3 Compaq is uniquely positioned to forge wide-ranging partnerships that guarantee Compaq’s client/server customers integrated, highly-reliable distributed enterprise solutions. For example, the Compaq ProLiant server has emerged as the platform of choice for SAP on Windows NT Server, holding over 50% of SAP AG’s R/3 market share for Windows NT installations worldwide. recently announced a record sales and distribution (SD) benchmark—one of the most demanding systems tests available for SAP solutions—of 350 SD benchmark users on a ProLiant 4500 running Windows NT Server.

In addition, through its two-year-old Client Server Partners Program, Compaq has been working with other software companies like Computer Associates, Dun & Bradstreet Software, PeopleSoft, Platinum Software, SEER Technologies, and Tivoli to port high-end, enterprise applications to Windows NT Server on Compaq ProLiant platforms.

(cont’d)

distributed enterprise

Performance is comparable to the fastest RISC-based midrange systems. Solutions based on industry-standard Pentium platforms cost 50% to 75% less than comparable midrange solutions. Deployment of systems with consistent architectures allows customers to easily manage and redeploy servers depending on their changing business needs. High-availability options for industry-standard systems now meet or exceed those for typical midrange levels of availability. Rapidly increasing numbers of business-critical applications, like SAP R/3, are being ported to x86-based servers, especially under Windows NT Server, yielding outstanding performance. Midrange-class integration, manageability, service and support are available for industry-standard solutions.

Compaq ProLiant

4500 5/166 3849 tpmC

$161 / tpmC

$619,445

4

5

HP 9000

K410

3809 tpmC 3631 tpmC 3406 tpmC 3921 tpmC

$364 / tpmC $289 / tpmC $240 / tpmC $495 / tpmC

$1,384,763 $1,049,656 $816,031 $1,939,674

4878

, a flexible, networked information

2

that is $500,000 to $1,000,000

IBM RS/6000

J30

Data General

AViiON 5800

SNI RM 600

340

4

Compaq

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HE COMPAQ PROLIANT

T

.

ALTERNATIVE FOR THE DISTRIBUTED ENTERPRISE

.

Leveraging its seven years of server expertise, Compaq is introducing a new breakthrough

.

platform for the distributed enterprise: the Compaq ProLiant 5000, offering midrange-class

.

performance and reliability.

.

The new Compaq ProLiant 5000 has 30% to 50% greater database performance than its

.

predecessor, the Compaq ProLiant 4500. The ProLiant 5000 also has 25% to 40% greater file

.

server performance. Customers currently deploying business-critical database applications or

.

doing file server consolidation on a ProLiant 4500 should consider a relatively quick transition to

.

the ProLiant 5000 based on its superior performance and value. In addition, customers who are

.

transitioning from Pentium to Pentium Pro processor-based servers should also strongly consider

.

transitioning from EISA to PCI peripherals to take full advantage of the ProLiant 5000 I/O

.

performance capabilities.

.

The breakthrough database capabilities of the Compaq ProLiant 5000 is dramatically illustrated

.

by the following benchmark. With Windows NT Server 4.0 and Microsoft SQL Server 6.5, the

.

ProLiant 5000 offers transaction performance similar to that of the leading proprietary midrange

.

systems for a total cost that is 35% to 65% less—this translates into a total savings of $400,000 to

.

$1,400,000 over a five-year period. This data also illustrates the challenge vendors such as

.

Hewlett Packard and Sun face when their larger, more costly, proprietary systems are less and less

.

often the best answer for their customers’ applications.

.

TPC-C Throughput

.

Price:Performance

.

Total System Cost

.

Number of

.

Processors

.

4

$500,000

$1,000,000

$1,500,000

greater affordability

$2,000,000

$2,500,000

(cont’d)

5000: T

ProLiant 4500 5/166

4 Processors

ProLiant 4500 5/133

4 Processors

IBM RS/6000 J30

8 Processors

HP9000 K410 4 Processors

3,000 4,000 5,000 6,000 7,000

increasing performance (tpmC)

Compaq ProLiant

5000

5676 tpmC

$136 / tpmC

$770,272

4

HP 9000

K420

4939 tpmC withdrawn 3631 tpmC 5607 tpmC 6444 tpmC

$232 / tpmC withdrawn $289 / tpmC $394 / tpmC $200 / tpmC

$1,144,200 withdrawn $1,049,656 $2,206,688 $1,289,077

4 12 8 16 16

HE NEW MIDRANGE

ProLiant 5000 6/166

4 Processors

save

$400,000

HP9000 K420 4 Processors

save

$1,400,000

NCR WorldMark 5100S

16 Processors

HP 9000

T500

IBM RS/6000

J30

SPARCcenter 2000E

16 Processors

NCR WorldMark

5100S

SPARCCenter

2000E

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Businesses are placing more and more performance demands on today’s file servers. Network

.

services such as messaging, security, routing, and global directory services are being added to the

.

traditional “file server,” making them more business-critical than ever before. These complex

.

multi-function servers may require additional processor performance. Compaq servers delivering

.

Pentium Pro performance are an excellent solution for these growing LAN environments. In

.

addition to enhancing CPU processing power, Compaq servers also provide customers with disk

.

and network subsystems that deliver world-class performance as illustrated by the following

.

NetBench benchmark

.

ProLiant 4500 is expected to improve with the final release of Windows NT Server 4.0.

.

5

10

9

8

7

6

5

4

Peak Throughput (MB/s)

3

NetBench 4.01, Windows NT Server 4.0 beta

2

1

0

File server performance under Novell NetWare shows a similar performance improvement when comparing a single-processor ProLiant 5000 to a similarly-configured ProLiant 4500. The bulk of the NetWare performance improvement is due to the ProLiant 5000 dual, peer PCI architecture rather than increased processor performance.

(cont’d)

6

. Both absolute and relative performance of the ProLiant 5000 versus the

File server performance of the Pentium Pro processor-based ProLiant 5000 is 30% faster than the ProLiant 4500 under W indows NT Server 4.0 bet a

7.5

6.3

One

Processor

ProLiant 450 0 5/166 ProLiant 500 0 6/200-25 6

Two

Processors

8.3

One

Processor

9.8

Two

Processors

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OMPARISON WITH THE PROLIANT

C

.

The following table illustrates the similarities and differences between the Compaq ProLiant 5000

.

and the Compaq ProLiant 4500. Where the Compaq ProLiant 5000 has a particular advantage,

.

that feature is

.

Processors

.

L2 Cache

.

Memory

.

Architecture

.

Expansion Slots

.

NIC

.

Disk Controller

.

Pre-Failure Warranty

.

Mass Storage

.

Storage Management

.

Form Factor

.

6

(cont’d)

bold italicized

4 x Pentium (133, 166MHz) 4 x Pentium Pro (166, 200MHz) runs at 66 MHz 2MB, 2-way set associative

64MB ECC standard, 1GB maximum 64 or 128MB ECC standard, 4GB 64-bit processor bus @ 267MB/s

128-bit memory bus

EISA bus @ 33MB/s concurrent processor and I/O operation 8 EISA slots 5 PCI slots

NetFlex-3 NIC installed in an EISA slot 10Mb/s upgradable to 100Mb/s Ethernet

Integrated 32-Bit Fast-Wide SCSI-2 SMART-2/E Array Controller installed in

an EISA slot on some models hard drives and memory hard drives, memory, and processors 5 hot-pluggable drive bays in rack models; 4 hot-pluggable drive bays in tower models over 350GB total storage capacity (1H96); will increase to over 700GB (2H96) supports DAT, DLT, and DLT Array a single DLT Array backs up over 200GB in under 5 hours tower or rack-mountable

4500

.

Compaq ProLiant 4500 Compaq ProLiant 5000

runs at processor speed (166 or 200MHz) up to 512KB, 4-way set associative ECC-protected

1

maximum

64-bit split-transaction, ECC-protected processor bus @ 540MB/s

256-bit memory bus dual, peer PCI buses @ 267MB/s

EISA bus @ 33MB/s concurrent processor and I/O operation

2 Shared PCI/EISA slots 1 EISA slot Netelligent NIC installed in a PCI slot 10/100 Mb/s standard redundant NIC functionality optional

Integrated 32-Bit Fast-Wide SCSI-2

SMART-2/P Array Controller installed in a PCI slot on some models

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OMPETITIVE COMPARISONS

C

.

Performance, price:performance, and partnerships offer only a partial view of a platform’s

.

capabilities. Compaq understands the importance of maximizing the availability of application

.

and file services to clients as well as ease-of-use features in a business-critical environment.

.

Because of this commitment to providing customers with the utmost in system availability and

.

usability, Compaq offers many features that are not currently offered by our competitors in their

.

x86-based product lines.

.

Price:Performance Features

.

Processor

.

Cache Memory Std. (KB)

.

Memory

.

(MB)

.

Expansion Slots

.

Controllers

.

Disk

.

Drive Bays

.

Total

.

Maximum Storage Int / Ext / Total(GB)

.

Dependability Features

.

Fault Prevention

.

Fault Tolerance

.

Rapid Recovery

.

Server Management Tools

.

Warranty

.

Standard

.

Ease-of-Ownership Features

.

Intelligent Software Installation

.

Remote Server Management

.

7

(cont’d)

7

Compaq IBM ALR

ProLiant 5000 PC Server 704 Revolution Quad6

Models Available

Number of Processors Supported 4 4 4

Symmetric Multi-Processing Yes Yes Yes

Standard Memory

Maximum Memory (GB) 4

Dedicated PCI Slots

Shared EISA/PCI Slots 2 0 1

Dedicated EISA Slots 1 4 7

Total PCI Slots 7 6 8

Total Slots 8 10 15

Integrated

Network Interface Controller Netelligent 10/100TX 10/100 Mbps Std. Optional

Removable Media Bays 3 5 2

Hot-Swap Drive Bays 4 1.6” (Tower), 5 1.6” (Rack) 12 (1” high) Optional

3.5" Floppy 1.44MB Std. 1.44MB Std 1.44MB Std.

CD-ROM Drive Standard Standard Standard

Server Environment Tracking

Disk System Tracking Standard Standard No

ECC Memory Standard Standard Standard

Off-Line Backup Processor

Hot-Pluggable Drives Standard Standard Optional

RAID Controller SMART-2 Controller (PCI) PCI Array Controller 3-channel PCI Array Ctrl.

On-Line Spare Yes Yes Yes

Redundant Power Supply Yes Yes Yes

Uninterruptible Power Supply Yes Yes Yes

Standby Recovery Server

On-Line Recovery Server (Clustering) Optional No No

Automatic Server Recovery Yes Yes No

Server Health Logs Yes Yes No

Processor Pre-Failure Warranty Yes No No

6/166, 6/200 6/166 6/166, 6/200

512 (6/166), 256 (6/200) 512 512 (6/166), 256 (6/200)

64 to 128 64 to 128 32 to 64

1

5 6 7

PCI Fast-Wide SCSI-2 PCI Fast-Wide SCSI-2 PCI IDE

7 in tower, 8 in rack 17 13

17.2 (T) 21.5 (R) / 301 / 301 25.68GB / NA 30GB/ NA

Standard Standard No

Yes No No

Optional No No

Insight Manager

3-Year On-Site 3-Year On-Site 5-Year system, 3-Year

SmartStart ServerGuide No

Yes Yes No

1 2

Labor, On-Site Optional

NOTE: NA denotes “Information Not Available.”

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8

(cont’d)

OMPAQ

C

ENTIUM PRO

P

ROCESSOR

P

ASED SERVERS

B

ALANCED

B

YSTEM

S

ERFORMANCE

P

For the distributed enterprise, Compaq Pentium Pro processorbased servers deliver midrange class performance at x86 price:performance levels, surpassing both Pentium processor-based servers and most RISC-based systems. The Pentium Pro processor helps enable this performance but overall system performance is determined by more than just the processor. Application servers make extensive use of all the key subsystems: processor, memory, and I/O subsystems such as the disk and NIC. A powerful engine doesn’t necessarily make a fast car; the same holds true for computers. The rest of the architecture must be tuned and optimized for highest performance.

-

Raw Processor Performance

Application servers are very processor-intensive and, therefore, will benefit much more from the increased performance of the Pentium Pro processor than will traditional file/print servers. In fact, the integer performance of the Pentium Pro processor actually all popular RISC processors.

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that of

8

This means

White Paper

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that applications that make heavy use of a processor’s integer instruction set, such as databases,

.

will significantly benefit.

.

:

.

9

8

7

6

5

4

SPECint95

3

2

1

0

The Pentium Pro processor’s outstanding performance is due in part to the incorporation of a number of

•

Complex new processors, such as the Pentium Pro processor, are expensive to design, debug and produce. The high volume of x86-based product sales, driven by high-volume market leaders such as Compaq, ensures that Compaq can continue to fund the research and development needed for innovation in overall server design and that Intel can continue to fund future generations of very complex chip development comparable to the Pentium Pro processor effort.

(cont’d)

8.09

7.43

Pentium

Pro

200MHz

dynamic execution

superscalar architecture, register renaming, speculative execution, out-of-order execution.

Alpha

300MHz

features borrowed from the leading RISC processors:

10

11

9

and

12

7.11

Pentium

Pro

166MHz

4.76

Pentium 166MHz

4.55

PowerPC

133MHz

4.41

PA-RISC

120MHz

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Memory

.

In an application server, system memory capacity is directly related to overall performance

.

because this memory is used to cache the hard disk and database records. The hard disk is

.

typically the slowest part of the system, so moving as much data to memory as possible results in

.

higher overall system performance. For example, typical installations of SAP R/3 on a Compaq

.

ProLiant 4500 running Oracle and Windows NT Server require 1GB of memory for the highest

.

performance; performance could be further improved by increasing memory. New Compaq

.

ProLiant 5000 servers will support up to 4GB

.

system.

.

In order to most cost-effectively deliver the largest memory capacity, most Pentium Pro processor-

.

based systems, including those from Compaq, will use new, higher-density, industry-standard

.

Dual Inline Memory Modules (DIMMs). DIMM technology offers numerous customer

.

advantages over SIMM technology including:

.

10

•

Maximizing I/O Performance

For compatibility with the broadest range of peripherals, Compaq Pentium Pro processor-based servers feature industry-standard PCI buses as well as an EISA bus for backward compatibility with the large installed base of EISA option boards.

Compaq has engineered the PCI bus implementation to precisely match the needs of different classes of applications. The Compaq ProLiant 5000 uses I/O throughput capability of 267MB/s, throughput necessary to ensure maximum, balanced performance of four-processor systems deployed in the most demanding business-critical environments. By contrast, a delivering a throughput of 133MB/s and is typically more suitable for two-processor systems.

Each subsystem in Compaq Pentium Pro processor-based servers has been fine-tuned for high performance using state-of-the art hardware technology and driver optimization. For example, to ensure high-performance access to critical network data, the new SMART-2 Array Controller is standard in some models of Compaq ProLiant 5000. Compaq was the first company to introduce disk array controllers to the network server marketplace in 1989; the SMART-2 Array Controller represents Compaq’s fifth generation of intelligent array controllers.

Each SMART-2 Array Controller features

•

(cont’d)

13

of memory, one of the largest capacities of any

13

4GB

system capacities using only 16 DIMMs; 33% less power consumption resulting from use of 3.3V logic, the same voltage levels used by the Pentium Pro processor and memory controller; and more cost-effective and flexible memory upgrades.

bridged

a total bandwidth of 40MB/s using two Fast-Wide SCSI-2 channels (20MB/s per channel), an enhanced Array Accelerator with 4MB of ECC-protected read/write cache, a hardware-based RAID engine, On-Line Capacity Expansion that allows storage capacity to be added to an existing RAID configuration without taking the server off-line, a high-performance processor optimized to manage full-featured drive arrays, and a 32-bit PCI bus-master host interface for maximum data burst performance.

PCI bus implementation is a more cost-effective means of

14

dual, peer

PCI buses that provide total

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With database applications typically doubling in size every year, SMART-2 Array Controller

.

technology enables support of very large databases: over 350GB today, using 4GB drives; more

.

than 700GB by second half of 1996, using 9GB drives; and terabytes of storage in 1997 using

.

next-generation controllers based on Fibre-Channel technology.

.

To illustrate Compaq’s commitment to performance excellence within each server subsystem, the

.

SMART-2 Array Controller was tested using the NetBench 3.0 Disk Mix Test

.

competitive array controller products.

.

Server Throughput (Bytes/second)

.

In a NetWare 4.1 environment, the Compaq SMART-2 Array Controller delivers

.

For high throughput off the network, the Netelligent 10/100TX NIC features software drivers that

.

are optimized for all major operating systems. The Dynamic Auto-Sensing Device Drivers will

.

allow Netelligent users to automatically switch from 10Mb/s to 100Mb/s operation to ensure the

.

highest performance for the future.

.

11

(cont’d)

15

along with

Compaq SMART-2/P vs. Competition

NetBench 3.0 Disk Mix Test

NETWARE 4.1 RAID 5

5,000,000 4,500,000 4,000,000 3,500,000 3,000,000 2,500,000 2,000,000 1,500,000 1,000,000

500,000

0

0 102030405060708090100110120

up to 156.8% higher throughput than the Adaptec AHA-3985 PCI RAID Adapter,

•

up to 76.9% higher throughput than the DPT SmartRAID PCI SCSI Disk Array

•

Controller, and up to 9.4% higher throughput than the Mylex DAC960P PCI Array Controller.

•

Compaq SMART-2/P Array Controller Mylex DAC960P Array Controller DPT SmartRAID PCI Array Controller Adaptec AHA-3985 Adapter

Number of Clients

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Compaq ProLiant 5000: An Architecture Tuned for Performance

.

The architecture of the Compaq ProLiant 5000 is dramatically different from that of the Compaq

.

ProLiant 4500 in order to take advantage of the full performance and unique characteristics of the

.

Pentium Pro processor as well as the latest in high-performance options.

.

The Compaq ProLiant 5000 features:

.

12

•

(cont’d)

a 66MHz ECC-protected processor bus with a throughput of 540MB/s; four-way set-associative processor speed through a separate, dedicated processor-to-cache bus; split transactions that allow processors to request data from slower I/O peripherals without tying up the Pentium Pro bus until data is available; a 256-bit wide memory bus; dual, peer PCI buses delivering a total available I/O bandwidth of 267MB/s; and, like the Compaq ProLiant 4500, fully concurrent cache, memory and I/O buses to optimize performance for CPU- and I/O-intensive applications such as databases.

64-Bit Processor Bus

16

L2 cache, up to 512KB per processor, that is accessed at full

17

540 MB/s + ECC

133 MB/s

PCI Bus

EISA Bus

133 MB/s

PCI Bus

256-Bit Memory Bus

18

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IGH-AVAILABILITY

H

.

Compaq understands that a company’s application servers manage its most critical data, that they

.

contain the heart of their business and are their lifeline to operations and productivity. Compaq’s

.

goal is to meet or exceed the levels of availability to which corporate customers were accustomed

.

with proprietary midrange solutions, but at more cost-effective price points. With that goal in

.

mind, Compaq is continually searching for new ways to deliver high-availability solutions to

.

protect business-critical data in the most cost-effective manner.

.

Compaq delivers value-add availability features and programs for its entire Compaq ProLiant

.

server line that are especially critical for solutions likely to be built on Compaq Pentium Pro

.

processor-based servers:

.

13

Fault-tolerant subsystems and rapid recovery features ensure that stand-alone Compaq

•

ProLiant servers have industry-leading system availability. Compaq Server Array products allow customers to cluster these servers to create even more

•

highly-available platforms. Cost-effective, two-node Server Arrays (next-generation clustering) serve the needs of branch offices and replicated sites, while multi-node Server Arrays will provide additional solution scalability for the data center.

Compaq servers undergo extensive pre-production testing by Compaq, by its industry

•

partners, and by its customers. This testing ensures that Compaq Pentium Pro processorbased servers are reliable and compatible with the large installed base of applications; it also ensures that customers’ transition from Pentium to Pentium Pro will be smooth.

The Utmost in Single-System Availability

The following chart illustrates the evolution of high-availability features that Compaq began implementing with the original Compaq Systempro in 1989.

Server Arrays

•

On-Line Recovery Server

Processor/Memory

•

Automatic Server Recovery

•

Off-Line Backup Processor

Power

•

Redundant Power Supply

Array Controller (SMART)

•

RAID 0, 1, 4, 5

•

Hot-pluggable drives

•

On-line disk spare

(cont’d)

1989-1995

1996

Processor (Pentium Pro)

•

ECC processor bus

•

ECC cache

•

parity address bus

Network Interface Controller

•

redundant Netelligent NICs

Power

•

N+1 redundant Processor Power Modules

Array Controller (SMART-2)

•

ECC-protected read/write cache

•

modular, battery-backed cache

•

On-Line Capacity Expansion

Storage Management

•

DLT Array

1997

Server Arrays

•

Multi-Node Clusters

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Six examples of unique, new Compaq features that maximize availability are

.

1.

.

14

Redundant NICs.

standby Netelligent NIC to become the active network controller in case of a primary failure.

2.

N+1 Redundant Processor Power Modules.

input voltage requirements; therefore, each Pentium Pro processor requires its own independent power. An optional, N+1 redundancy scheme supports up to three Processor Power Modules for every two processors; if one fails, there is a seamless, on-line backup.

3.

Expanded Pre-Failure Warranty.

Warranty by now including the Pentium Pro processor. Pre-Failure Warranty ensures that when customers using Compaq Insight Manager receive notification that a critical server component may fail, the component is replaced for free under Compaq’s three-year, onsite warranty. System administrators can proactively schedule downtime for maintenance and not interrupt critical business operations that rely on these enterprise-class servers.

4.

Optimized system signal path and air flow routing.

the ground up, Compaq has leveraged its seven years of server design experience to uniquely ensure highly reliable operation under the heaviest electrical and thermal loading conditions.

5.

On-Line Capacity Expansion.

to be added to an existing RAID configuration without taking the server down.

6.

DLT Array.

This high-performance backup capability is ideal for Compaq application servers with Pentium Pro processors because they will typically store large amounts of critical data. With RAID 5 redundancy, one tape drive can fail and backup or restore can continue interrupted.

Compaq Server Arrays

In 1995 Compaq announced phased delivery for clustering Compaq servers that will result in cost-effective high-availability and scalability. This plan allows customers to grow their computing platforms as their applications grow, in a cost-effective manner. The delivery of these products began in mid-1995 with On-Line Recovery Server for Windows NT Server.

Compaq quickly followed up by driving the establishment of a new industry standard for Windows NT Server clustering. In October, 1995 Compaq, Microsoft and Tandem announced an alliance with other industry partners to grow the support base for new cluster-aware applications that will take advantage of this new Windows NT Server clustering platform.

Compaq’s Server Array products will provide customers with the components they need to build robust database solutions for both the branch office and data center at cost-effective, industrystandard prices.

High-Availability for the Branch Office

With the introduction of On-Line Recovery Server, many more customers are choosing to deploy business-critical, branch office or replicated site applications on industry-standard Compaq platforms. On-Line Recovery Server minimizes cost of ownership and increases availability for Windows NT Server customers by allowing either server in this two-node Server Array to take on the work load of both servers in the unlikely event of a failure. Because it automates the process for detecting and recovering from a server failure, On-Line Recovery Server eliminates the need for an immediate service call, making it ideal for branch offices or replicated sites where the support staff may not always be on site.

On-Line Recovery Server is the first high-availability, clustering solution to be supported under Microsoft SQL Server 6.5.

(cont’d)

This high-availability operating mode for Netelligent NICs allows a hot,

Intel Pentium Pro processors have stringent

Compaq is also broadening the scope of its Pre-Failure

By designing its own systems from

The SMART-2 Array Controller allows new storage capacity

The new Compaq DLT Array can back up over 200GB in less than 5 hours.

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Clusters for the Data Center

.

Clustering used to mean cost-prohibitive, proprietary hardware and software. The Compaq,

.

Microsoft, and Tandem initiative is focused on achieving the highest levels of availability and

.

scalability in a cost-effective, industry-standard solution for Windows NT Server platforms. For

.

its multi-node Server Arrays, Compaq will use Tandem’s highly-reliable ServerNet technology as

.

the standard server interconnect. With high-availability intrinsic to its approach, ServerNet

.

delivers high-bandwidth with low-latency, ensuring good scalability as nodes are added to the

.

cluster. ServerNet-based solutions will also benefit from low entry and incremental costs.

.

Ensuring Tested Transitions To Pentium Pro Processor-Based Systems

.

Compaq takes no chances with server reliability. Exhaustive application testing, third party

.

hardware testing, stand-alone testing and network testing on Compaq hardware is extensive. For

.

example, the Compaq plan for Pentium Pro processor-based servers calls for over 16 machine-

.

years, 95 man-months, and thousands of hours of testing with all major operating systems.

.

Compaq has supplemented this in-house testing by taking a leadership role in working with

.

major software vendors and integrators, and with Intel, to bring Compaq ProLiant servers,

.

Pentium Pro processor technology, and third-party applications together to ensure confident

.

deployment of business-critical applications on this platform. These programs ensure that not

.

only are Compaq Pentium Pro processor-based systems compatible with applications on the

.

market, but also that these and future applications are optimized to run on Compaq ProLiant

.

servers.

.

DAVINCI

.

In a series of business strategy workshops and technology demonstrations, Compaq and Andersen

.

Consulting, Intel, SAP AG and Bay Networks are demonstrating line-of-business solutions based

.

on industry-standard environments. These DAVINCI workshops demonstrate a working model of

.

a virtual corporation that illustrates how new, best-of-breed technologies enable businesses to

.

deploy industry-standard, business-critical solutions in a multi-vendor environment. These

.

workshops feature Pentium Pro processor-based servers and desktops from Compaq running a

.

three-tier SAP R/3 application on Microsoft Windows NT Server.

.

Pacesetter ’96

.

With the Pacesetter ’96 program, Compaq and Intel have placed Compaq ProLiant 5000 systems

.

with ISVs and integrators so that these companies can gain insight into optimization and

.

integration techniques that are invaluable for providing a well-integrated platform for deploying

.

business-critical applications. Some of the companies participating in Pacesetter ’96 include:

.

• Andersen Consulting

.

• Arbor Software

.

• Dun & Bradstreet

.

Software

.

Server Evaluation Program

.

Compaq and Intel have also initiated the Pentium Pro Server Evaluation Program (SEP) to

.

validate the Pentium Pro processor-based Compaq ProLiant 5000. Compaq is choosing

.

representative customers such as Carl Karcher Enterprises, Countrywide Home Loans, MCI, and

.

SmithKline Beecham from a variety of industries to ensure that Pentium Pro-based solutions are

.

integrated successfully in customers’ “real world” environments. By the time it becomes

.

generally available, the ProLiant 5000 will have hundreds of hours of testing in some of the most

.

demanding multiprocessor server environments to ensure that solutions based on the Compaq

.

15

(cont’d)

• Baan

• BMC

• Informix

• ISOCOR

• Lotus

• Oracle

• Price Waterhouse

• SAP

• SHL

• Sybase

• Tivoli

• ViewStar

ProLiant 5000 platform are reliable, robust and ready to be deployed in today’s business-critical environments.

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NVESTMENT

I

ROTECTION

P

Compaq has always recognized investment protection as a key customer requirement. Traditionally, Compaq has focused on delivering the correct balance of introducing new technologies to the market as soon as possible, while at the same time maintaining investment protection for the large installed base of Compaq servers. To smooth customer transitions, Compaq has offered processor board upgrades which allow customers to receive credit for their existing processor boards towards the purchase of newer processor boards. As Compaq continues to move into the larger, more demanding, midrange market, a new and expanded Compaq Investment Protection Program will better protect customers' investments and offer more flexible, more cost-effective upgrade options.

Compaq ProLiant customers will continue to benefit from the flexible board-level upgrades to next-generation processor technologies that Compaq has traditionally offered. In addition to offering these board-level upgrades, Compaq will offer ProLiant 4500 customers the option to upgrade their servers to include Pentium Pro and PCI technologies.

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17

One of the many reasons Compaq designed its own system board for the Compaq ProLiant

•

5000 is to allow customers that have rack-mountable Compaq ProLiant 4500 servers a flexible board-level upgrades that deliver 100% of the performance they would expect from a Pentium Pro processor/PCI-based server from Compaq.

Compaq ProLiant 4500 tower customers can also migrate to the ProLiant 5000.

•

And, of course, Compaq ProLiant 1500 customers can upgrade their current systems to the

•

Pentium Pro processor with processor board upgrades available later in 1996.

In all cases, the level of investment protection from Compaq is even greater today than it has been in the past. As market share leader, Compaq servers are providing business-critical service to thousands of the world’s largest businesses. Expect a continued commitment to investment protection as Compaq continues to deliver more exciting possibilities for the midrange market.

Note on Intel XXpress Upgrades

Competitive four-processor Pentium systems based on the Intel XXpress architecture, such as those from HP, DEC, NCR and Dell, may be limited in their upgradability to Pentium Pro processors. The XXpress processor bus, designed for Pentium processors, does not have the bandwidth to support multiple Pentium Pro processors if they are interfaced directly with that processor bus. If the existing XXpress system board is kept, upgradability will be limited to two Pentium Pro processors. To upgrade an Intel XXpress-based Pentium system to a system capable of supporting four Pentium Pro processors May require an entire system board swap or complete system exchange.

(cont’d)

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ARTNERSHIPS FOR INTEGRATION AND COMPATIBILITY

P

.

Compaq servers are the best choice for business-critical solutions because there’s a lot more to a

.

platform than just the hardware. Compaq maintains seamless partnerships with other leaders in

.

the industry, such as Microsoft, Novell, Oracle, and SAP, that result in optimized integration of

.

leading software products running on Compaq servers. And Compaq management tools help

.

assure the high availability and reliability that business-critical applications require.

.

Microsoft

.

Compaq and Microsoft are working together to accelerate the acceptance of client/server solutions

.

using Windows NT Server on industry-standard platforms. One example of a Windows NT site is

.

USF&G, a property and casualty company. USF&G is building its next-generation business-

.

critical applications around Windows NT, Sybase SQL Server, Replication Server and OmniSQL

.

Gateway running on Compaq ProLiant servers. The company uses this industry-standard solution

.

to create business-critical policy-writing systems that underwrite and issue new policies to

.

businesses they insure. To address the requirements of Windows NT Server customers requiring

.

a high-availability, multiprocessing server, Compaq introduced the ProLiant 4500 models

.

featuring tight integration and performance optimization for BackOffice, Microsoft’s client/server

.

solutions, using Compaq SmartStart.

.

Novell

.

Compaq’s long-standing partnership with Novell means that the two companies not only work

.

together on a technical, product level but also in many other areas, including service and support.

.

If a customer has a problem installing, integrating or running a Compaq server with NetWare,

.

Compaq will take responsibility for the problem and come back to the customer with a solution

.

after working with Novell. Client/server customers require this level of partnership and Compaq

.

is one of the few companies that can provide this service.

.

Oracle

.

In 1994 Oracle established a Compaq Products Division. The first tangible result was support for

.

and integration of Oracle 7 via SmartStart. At the Intel Pentium Pro processor press conference,

.

Oracle, Novell and Compaq demonstrated the first parallel database server technology running on

.

industry-standard platforms. Four Compaq ProLiant servers, each with four Pentium Pro

.

processors, ran Oracle 7 Parallel Server and Novell’s UnixWare Cluster Management System.

.

The demonstration showed a performance increase of at least 80 % each time a server was added

.

to the cluster. In the second half of 1996 Oracle and Compaq plan to bring resilient parallel

.

server solutions to branch offices and distributed departments at unprecedented prices and also to

.

optimize Oracle’s Enterprise and Workgroup InterOffice software solutions for Compaq servers.

.

Compaq SmartStart

.

Instead of requiring the use of on-site technicians (which the customer ultimately ends up paying

.

for) to install a network operating system and ensure it is configured for maximum performance,

.

Compaq developed SmartStart. SmartStart is a software tool on CD-ROM that provides the same

.

level of integration and expertise at a fraction of the cost of a technician. SmartStart provides

.

instant access to thousands of hours of Compaq integration testing, tight partnerships with the

.

leading software vendors, and intimate knowledge of Compaq hardware.

.

Compaq SmartStart is an intelligent, CD-ROM-based method for configuring, installing,

.

integrating, and optimizing network operating systems, relational databases and other

.

18

(cont’d)

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client/server-related software on Compaq servers. While Compaq now offers an advanced version

.

of SmartStart that has evolved since its introduction over two years ago, competitors such as IBM

.

and HP have attempted to follow Compaq’s efforts in this area by introducing first-generation

.

imitations that don’t deliver the level of integration value provided by today’s SmartStart.

.

For more information on SmartStart, see SmartStart 2.50 QuickSpecs, the SmartStart Catalog and

.

the Compaq SmartStart 2.3/IBM ServerGuide 2.0 Competitive Analysis.

.

Compaq Insight Manager

.

Compaq Insight Manager, standard with all Compaq servers, is an easy-to-use, standards-based

.

application that allows network administrators to remotely manage and maintain Compaq servers.

.

Together with Compaq Insight Management Agents and the management capabilities built into

.

Compaq Servers, Insight Manager maximizes the effectiveness of network support staff while

.

increasing network dependability.

.

As a pioneer in server management, Compaq realizes the need to incorporate servers into a

.

multivendor networking environment as seamlessly as possible. That’s why Insight Manager

.

supports a wide variety of network operating systems and incorporates management standards

.

that allow integration with the leading network management platforms including Microsoft SMS,

.

SunNet Manager, IBM NetView for AIX, HP OpenView for Unix and Novell’s ManageWise.

.

Among the many features it offers, Compaq Insight Manager provides in-depth monitoring,

.

analysis and control of the fault, performance and configuration aspects of Compaq servers locally

.

or remotely, on or off the network. These capabilities allow confident and cost-effective

.

deployment of Compaq servers for business-critical networks. And Insight Version Control

.

updates lower the cost of managing a customer’s network by consistently providing the latest

.

drivers and firmware from Compaq.

.

For more information on Insight Manager, see Insight Manager 2.61 QuickSpecs, the Compaq

.

Insight Manager2.4/IBM NetFinity 2.01 Competitive Analysis and the HP NetServer Assistant

.

2.0 Competitive Analysis.

.

OMPAQ GLOBAL SYSTEMS-CLASS SERVICE AND SUPPOR T

C

.

Compaq provides the services that customers require for their critical distributed enterprise

.

environments, reaching a class traditionally reserved for midrange computer companies. Strong

.

partnerships with established leaders in service and support, infrastructure investments in three

.

worldwide Technical Support Centers, and utilization of Compaq tools and technology ensures

.

customers access to comprehensive service and support when and where they need it.

.

With its systems-class service providers and programs, Compaq provides a tight linkage of service

.

and support structures. In North America, for example, the System Service Provider (SSP)

.

program selects service providers from within the indirect channel who have invested in the

.

capability to provide enterprise levels of service. Compaq supports these service providers in

.

meeting customers’ enterprise-level service and support needs through dedicated account

.

management, specialized training, and priority access to spare parts and technical support.

.

Compaq's relationships with its SSPs and Global Service and Support Provider (GSSP), offer

.

customers many alternatives for obtaining service and support, ranging from basic repair

.

warranty service to multinational enterprise-level value-added services.

.

For customers who require services which are unavailable from local SSPs—due to geographic or

.

capability constraints—Compaq has developed Compaq-branded Service and Support Offerings

.

(CSSO). These offerings are provided by our Global Service and Support Provider, Digital

.

Multivendor Customer Services.

.

19

(cont’d)

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Integration and Implementation Services

.

20

Installation Services

•

Compaq systems. Compaq experts that understand your IT environment install and ensure proper integration of your Compaq hardware, software, and networking solutions.

Interoperability Services

•

free integration of Compaq systems in a multivendor hardware and software environment.

Technical Consulting Services

•

knowledge and expertise with specialized information as they integrate and implement new Compaq systems into their IT environment.

Maintenance Services

Onsite Hardware Maintenance

•

customers’ specific availability requirements. Customers can select from a range of flexible service coverage, response time, and delivery methods. Options include 2 or 4 hour response, 7x24 coverage including holidays, and a resident engineer.

Enhanced Software Support

•

customers who require assistance in resolving complex problems as they apply to CSSOsupported Network Operating Systems, Database Management Systems products, Application Server products, and Network Management products.

Maximizing and Optimizing Services

LAN Management Support

•

resources by having Compaq experts assist with LAN monitoring and administration support.

Remote System Management

•

activity to identify potential problem areas.

System Management Support

•

also helps focus on operations review, performance analysis and tuning, security assessment, and implementation of System Healthcheck recommendations.

System Healthcheck

•

cause any performance degradation. Compaq will provide expert recommendations for addressing problems and optimizing performance.

Compaq’s service and support partnerships and comprehensive programs make Compaq servers among the best supported industry standard platforms for deploying business-critical applications.

ONCLUSION

C

The computing environment is rapidly changing. And customers are moving from proprietary systems onto industry-standard platforms. No longer locked into expensive, proprietary singlevendor solutions, companies can mix and match industry-standard components to create extremely cost-effective, business-critical solutions. New Pentium Pro processor-based solutions from Compaq not only deliver the performance and price:performance you would expect, but also feature the high-availability,scalability, and management attributes of midrange solutions.

It takes more than just hardware to deliver a complete solution. Compaq’s leadership in forging strong, strategic partnerships with key industry players dramatically enhances the value of awardwinning Compaq servers. Because of this leadership, customers can trust Compaq for an integrated, reliable, high-performance Compaq server solution—now and in the future.

(cont’d)

ensure the most efficient and cost-effective implementation of your

offered by Compaq provide distributed enterprise customers error-

are available to customers to complement their internal

offers custom-tailored service agreements that meet

provides up to 7x24 comprehensive remote support to

allows customers to cost-effectively augment their internal

Customers benefit from day-to-day monitoring of system

helps not only monitor and manage day-to-day activities, but

services help customers uncover potential trouble spots before they

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OTES

.

N

.

1

.

The Compaq ProLiant 5000 supports 4GB architecturally; system configurations of more than

.

2GB will be possible when future memory technology becomes available; availability is

.

currently expected to be in late 1996 or early 1997.

.

2

.

The Transaction Processing Council defines the total cost of ownership to include all hardware

.

and software costs to support the benchmark as well as all service and support costs to cover a

.

five year maintenance period.

.

3

.

Market share data are from International Data Corporation, February 1996: Compaq = 36%;

.

IBM = 14%; HP = 12%.

.

4

.

Market share data are from SAP AG.

.

5

.

SD benchmark was run with a 3-tiered client/server architecture using Microsoft Windows NT

.

Server 3.51, Microsoft SQL Server 6.0, and SAP R/3 v.2.2F.

.

6

.

The full disclosure report on the NetBench benchmark can be found in the ProLiant 5000

.

Performance Brief (Document number 123A/0696). System configurations were

.

ProLiant 4500

.

21

•

ProLiant 5000

•

7

Based on data as of February, 1996.

8

SPECint95 benchmark data for Alpha, PowerPC, and PA-RISC processors were found on the

SPEC Web page as of April 29, 1996. The Intel processor data is from Intel.

9

A processor with a superscalar architecture has the ability to execute multiple instructions per

clock cycle. The Pentium Pro processor can schedule as many as five instructions simultaneously due to the dual integer execution units, the dual address generation units, and the single floating point execution unit.

10

Register renaming is required to support the execution of concurrent instructions. For

example, two instructions, which have no outstanding dependencies, might use the same programmer-visible register. Internal to the processor, however, the registers will be dynamically renamed to allow the instructions to execute simultaneously rather then executing them serially.

11

The Pentium Pro processor, via its branch target buffer, supports speculative execution of

branches. By predicting the correct branch most of the time, the number of instructions that are available to be scheduled at any particular time is increased, thus increasing the potential number of instructions that can be executed out of order.

12

The Pentium Pro architecture fetches and decodes a large number of instructions that are then

sent to an for dependencies on prior instructions. If there are no dependencies, the instruction is scheduled and executed, even if it is "out of order". This minimizes the impact of cache misses

(cont’d)

One or two 5/166 processors; each with 2MB L2 cache One NetFlex-3/E NIC One SMART-2/E array controller Six 2GB Fast-Wide SCSI-2 drives

One or two 6/200 processors; each with 256KB L2 cache One Netelligent 10/100 TX PCI NIC One SMART-2/P array controller Six 2GB Fast-Wide SCSI-2 drives

instruction pool

. These instructions are then evaluated by the dispatch/execute unit

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OTES (CONTINUED

N

.

since the processor can potentially continue to execute code while memory services a cache

.

miss.

.

13

.

The Compaq ProLiant 5000 supports 4GB architecturally; system configurations of more than

.

2GB will be possible when future memory technology becomes available; availability is

.

currently expected to be in late 1996 or early 1997.

.

14

.

DIMMs are added in groups of four for the ProLiant 5000; SIMMs would require the less

.

flexible addition in groups of eight.

.

15

.

All controllers were configured for RAID 5 with six 2.1-GB hard drives and 4MB of controller

.

cache; controller were installed in a ProLiant 1500 with one 133-MHz Pentium processor and

.

one Netelligent/P Controller. See the SMART-2 Array Controller Performance Brief

.

(document number 034B/0296) for more details.

.

16

.

Four-way set-associativity allows four memory blocks within the same cache line to be cached

.

simultaneously. In typical applications such as databases, and with all other factors equal, this

.

results in an effective cache size that is double that of a two-way set-associative cache (such as

.

that found on the Compaq ProLiant 4500). For example, a 512KB 4-way cache effectively

.

behaves like a 1MB 2-way cache.

.

17

.

While the I/O peripheral is assembling its data, the Pentium Pro bus can be used for other

.

memory or I/O transfers. Only when the peripheral is ready to return data to the requesting

.

processor does that I/O peripheral again require access to the Pentium Pro bus.

.

18

.

Concurrency allows independent operation of the I/O bus and the CPU. Bus master devices

.

transfer data to and from memory simultaneous with CPU accesses through use of multi-level

.

buffers that control the data flow and perform burst operations to maximize the memory and

.

I/O bandwidth. High throughput I/O devices, such as the SMART-2 Array Controller, achieve

.

full performance without interfering with CPU execution.

.

22

(cont’d)

)

HP COMPAQ PROLIANT 5000 SERVER User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual