Intel AS/400 RISC Server Manual de usuario

IBM Power SystemsPerformance Capabilities ReferenceIBM i operating system Version 6.1January/April/October 2008 Thisdocument is intended for use by q

Special NoticesDISCLAIMER NOTICEPerformance is based on measurements and projections using standard IBM benchmarks in a controlledenvironment. This i

Trade Scalability Results:Figure 6.3 Trade Scaling Resultsy Trade 3 chart: V5R2 - 890/2488 32-Way 1.3 GHz, V5R2 was measured with WebSphere 5.0 an

PingServlet2TwoPhase drives a Session EJB which invokes an Entity EJB with findByPrimaryKey(DB Access) followed by posting a message to an MDB through

Figure 6.4 WebSphere Trade 3 primitive results. Note: The measurements were performed on the same machine, an 270-2434 600 MHz 2-Way. All results ar

Accelerator for System iCoinciding with the release of i5/OS V5R4, IBM introduces new entry IBM System i models. Themodels introduce accelerator tech

Figure 6.6 provides insight into response time information regarding low-end System i models. There aretwo key concepts that are displayed in the data

Performance Considerations When Using WebSphere Transaction Processing (XA)In a general sense, a transaction is the execution of a set of related oper

Restriction: You cannot benefit from the one-phase commit optimization in the following circumstances: y If your application uses a reliability attrib

6.4 IBM WebFacing The IBM WebFacing tool converts your 5250 application DDS display files, menu source, and help filesinto Java Servlets, JSPs, JavaB

details on the number of I/O fields for each of these workloads. We ran the workloads on three separatemachines (see table 6.5) to validate the perfo

• (Advanced Edition Only) Struts-compliant code generated by the WebFacing Tool conversionprocess which sets the foundation for extending your Webface

The following terms, which may or may not be denoted by an asterisk (*) in this publication, are trademarks of theIBM Corporation.PowerTM Systems Soft

When set to an appropriate level for the Webfaced application, the Record Definition Cache can provide adecrease in memory usage, and slightly decreas

To enable the servlet that will display the contents of the cache, first add the following segments to theWebfaced application’s web.xml.<servlet&g

Save a list of all the cached record data definitions.This list is saved in the RecordJSPs directory of theWebfaced application. The actual record def

Refer to the following table for the functionality provided by the Record Definition Loader servlet.This option will load the record definitions list

WebSphere Application Server. On System i servers, the recommended WebSphere applicationconfiguration is to run Apache as the web server and WebSphere

You also need to add the directive:SetOutputFilter DEFLATE to the container to be compressed, or globally if the compression can always be done. Ther

PartnerWorld for Developers Webfacing website: http://www.ibm.com/servers/enable/site/ebiz/webfacing/index.htmlIBM WebFacing Tool Performance Update -

6.5 WebSphere Host Access Transformation Services (HATS)WebSphere Host Access Transformation Services (HATS) gives you all the tools you need to quick

customization requires development effort, while Default Rendering requires minimal developmentresources.Default: The screens in the application’s

IBM Systems Workload Estimator for HATSThe purpose of the IBM Systems Workload Estimator (WLE) is to provide a comprehensive System isizing tool for n

Purpose of this DocumentThe intent of this document is to help provide guidance in terms of IBM i operating systemperformance, capacity planning infor

requirements do not take into account the requirement for other web applications, such as customerapplications. You should use IBM Systems Workload Es

6.7 WebSphere PortalThe IBM WebSphere Portal suite of products enables companies to build a portal website serving theindividual needs of their employ

6.9 WebSphere Commerce PaymentsUse the IBM Systems Workload Estimator to predict the capacities and resource requirements forWebSphere Commerce Payme

of access mechanisms. Please see the Connect for iSeries white paper located at the following URL formore information on Connect for iSeries.http://

1. Connector relative capacity: The different back-end connector types are meant to allow users asimple way to connect the Connect for iSeries produc

Chapter 7. Java PerformanceHighlights:y Introductiony What’s new in V6R1y IBM Technology for Java (32-bit and 64-bit)y Classic VM (64-bit)y Determini

option for Java applications which require large amounts of memory. The Classic VM remains availablein V6R1, but future i5/OS releases are expected t

On i5/OS, IBM Technology for Java runs in i5/OS Portable Application Solutions Environment (i5/OSPASE) with either a 32-bit (for the 32-bit VM) or 64-

Fortunately, it is not too difficult to come up with parameter values which will provide good performance.If you are moving an application from the Cl

performance, it pays to apply analysis and optimizations to the Java bytecodes, and the resulting machinecode.One approach to optimizing Java bytecode

Chapter 1. IntroductionIBM System i and IBM System p platforms unified the value of their servers into a single,powerful lineup of servers based on i

applications with a large number of classes. Running CRTJVAPGM with OPTIMIZE(*INTERPRET)will create this program ahead of time, making the first star

display; rates of 20 to 30 faults per second are usually acceptable, but larger values may indicate aperformance problem. In this case, the size of t

later releases the cache is enabled and the maxpgms set to 20000 by default, so no adjustment is usuallynecessary.The verification cache operates by c

libraries and environments may require a particular version. The Classic VM continues to supportJDK 1.3, 1.4, 1.5 (5.0), and 1.6 (6.0) in V5R4, and J

application itself or a reasonably complete subset of the application, using a load generating tool tosimulate a load representative of your planned d

y Beware of misleading benchmarks. Many benchmarks are available to test Java performance, butmost of these are not good predictors of server-side Ja

4. Database Specific. Use of database can invoke significant path length in i5/OS. Invoking itefficiently can maximize the performance and value of

does take advantage of programs created at optimization *INTERPRET. These programs requiresignificantly less space and do not need to be deleted. Pr

y The I/O method readLine( ) (e.g. in java.io.BufferedReader) will create a new String.y String concatenation (e.g.: “The value is: “ + value) will g

int i = 0; try { while (true) { System.out.println (arr[i++]); } } catch (ArrayOutOfBoundsException e) { //

versions. The primary public performance information web site is found at: http://www.ibm.com/systems/i/advantages/perfmgmt/index.htmlIBM i 6.1 Perfor

applications. The Toolbox driver supports remote access, and should be used when accessing thedatabase on a separate system. This recommendation is

ResourcesThe i5/OS Java and WebSphere performance team maintains a list of performance-related documents at http://www.ibm.com/systems/i/solutions/per

Chapter 8. Cryptography PerformanceWith an increasing demand for security in today’s information society, cryptography enables us toencrypt the commun

CSP API SetsUser applications can utilize cryptographic services indirectly via i5/OS functions (SSL/TLS, VPN IPSec)or directly via the following APIs

8.3 Software Cryptographic API Performance This section provides performance information for System i systems using the following cryptographicservice

Notes:y Transaction Length set at 1024 bytesy See section 8.2 for Test Environment Information35163204810SHA-1 / RSA3012920481SHA-1 / RSA2401,15510241

which is designed to meet FIPS 140-2 Level 4 security requirements. This new cryptographic card offersthe security and performance required to support

Notes:y Transaction Length set at 1024 bytesy See section 8.2 for Test Environment information465204810SHA-1 / RSA30820481SHA-1 / RSA1,074102410SHA-1

y Supported number of 4764 Cryptographic Coprocessors:88IBM System i5 520, 550, 570 2/4W832IBM System i5 570 8/12/16W, 595Maximum per partitionMaximum

Chapter 9. iSeries NetServer File Serving PerformanceThis chapter will focus on iSeries NetServer File Serving Performance.9.1 iSeries NetServer Fil

Chapter 2. iSeries and AS/400 RISC Server Model Performance Behavior2.1 OverviewiSeries and AS/400 servers are intended for use primarily in client/

Measurement Results:Conclusion/Explanations:IBM i 6.1 Performance Capabilities Reference - January/April/October 2008© Copyright IBM Corp. 2008 Chapt

From the charts above in the Measurement Results section, it is evident that when customers upgrade toV5R4 they can expect to see an improvement in t

Chapter 10. DB2 for i5/OS JDBC and ODBC PerformanceDB2 for i5/OS can be accessed through many different interfaces. Among these interfaces are: Wind

y Use the lowest isolation level required by the application. Higher isolation levels can reduce performance levels as more locking and synchroniza

y Employ efficient SQL programming techniques to minimize the amount of data processedy Prepared statement reuse to minimize parsing and optimization

Packages may be shared by several clients to reduce the number of packages on the System i server. Toenable sharing, the default libraries of the cli

‘All libraries on the system’ will cause all libraries on the system to be used for catalog requests and maycause significant degradation in response

Chapter 11. Domino on iThis chapter includes performance information for Lotus Domino on the IBM i operating system. Someof the information previousl

y IBM Lotus Domino V8 server with the IBM Lotus Notes V8 client: Performance, October 2007 http://www.ibm.com/developerworks/lotus/librar

 Delete documents marked for deletion Create 1 appointment (every 90 minutes) Schedule 1 meeting invitation (every 90 minutes) Close the viewy Dom

interactive utilization - an average for the interval. Since average utilization does not indicate potentialproblems associated with peak activity, a

optimal performance but of course without the function provided in the Domino 7 templates. The following links refer to these articles: y Lotus Do

<1%72ms51.5%20,000Domino 6<1%>5sec96.2%20,000Domino 5.0.11<1%65ms11.0%3,800Domino 6 <1%119ms19.4%3,800Domino 5.0.11<1%64ms24.0%2,000

The 2000 user comparison was done on a model i825-2473 with 6 1.1GHz POWER4 processors, 45GBof memory, and 60 18GB disk drives configured with RAID5,

shopping application, but would provide even better response times than the 270-2423 as projected inFigure 11.3.When using MHz alone to compare perfor

The eServer i5 Domino Edition builds on the tradition of the DSD (Dedicated Server for Domino) and theiSeries for Domino offering - providing great

that the larger the buffer pool size, the higher the fault rate, but the lower the cpu cost. If thefaulting rate looks high, decrease the buffer pool

7. Full text indexesConsider whether to allow users to create full text indexes for their mail files, and avoid the useof them whenever possible. Thes

11.8 Domino Web AccessThe following recommendations help optimize your Domino Web Access environment:1. Refer to the redbooks listed at the beginning

11.10 Performance Monitoring StatisticsFunction to monitor performance statistics was added to Domino Release 5.0.3. Domino will trackperformance me

2. *MINIMIZE The main storage will be allocated to minimize the space used by the object. That is, as little mainstorage as possible will be allocate

2.1.4 V5R2 and V5R1 There were several new iSeries 8xx and 270 server model additions in V5R1 and the i890 in V5R2.However, with the exception of the

The following is an example of how to issue the command: CHGATR OBJ( name of object) ATR(*MAINSTGOPT) VALUE(*NORMAL, *MINIMIZE, or*DYNAMIC)The chart b

During the tests, the *DYNAMIC and *MINIMIZE settings used up to 5% more CPU resource than*NORMAL. Figure 11.5 below shows the response time data rath

NOTE: MCU ratings should NOT be used directly as a sizing guideline for the number of supportedusers. MCU ratings provide a relative comparison metri

users or relatively low transaction rates, response times may be significantly higher for a small LPAR(such as 0.2 processor) or partial processor mod

Chapter 12. WebSphere MQ for iSeries12.1 IntroductionThe WebSphere MQ for iSeries product allows application programs to communicate with each other

enhancement should allow customers to run with smaller, more manageable, receivers with less concernabout the checkpoint taken following a receiver ro

applications using MQ Series are running, you may need to consider adding memory to these pools tohelp performance. y Nonpersistent messages use signi

Chapter 13. Linux on iSeries Performance 13.1 SummaryLinux on iSeries expands the iSeries platform solutions portfolio by allowing customers and softw

y Shared Processors. This variation of LPAR allows the Hypervisor to use a given processor inmultiple partitions. Thus, a uni-processor might be div

iSeries Linux is a program-execution environment on the iSeries system that provides a traditionalmemory model (not single-level store) and allows dir

y The new server algorithm only applies to the new hardware available in V4R5 (2xx, 8xx and SBxmodels). The behavior of all other hardware, such as th

13.4 Basic Configuration and Performance QuestionsSince, by definition, iSeries Linux means at least two independent partitions, questions of configur

13.5 General Performance Information and ResultsA limited number of performance related tests have been conducted to date, comparing the performanceo

Linux ILE PASEComputational Environment00.20.40.60.811.2Relative Performance (Bigger Better)IntegerFloatingPointFraction of ILE PerformanceOne virtue

Here, a model 840 was subdivided into the partition sizes shown and a typical web serving load was used.A "hit" is one web page or one image

As noted above, many distributions are based on the 2.95 gcc compiler. The more recent 3.2 gcc is alsoused by some distributions. Results there show

y Cost. Because the disk is virtual, it can be created to any size desired. For some kinds of Linuxpartitions, a single modern physical disk is over

typically recommended because it allows the Linux partitions to leverage the storage subsystem thecustomer has in the OS/400 hosting partition.2. As

do so, you may wish to compare with the next previous version. This would be especially importantif you have one key piece of open source code largel

substantial amount of Virtual I/O. This is probably on the high side, but can be important to havesomething left over. If the hosting partition uses

Native and Virtual LAN (e.g. from outside the box on Native LAN, through the partition with theNative LAN, and then moving to a second partition via

grows at a rate which can eventually eliminate server/batch capacity and limit additional interactivegrowth. It is best for interactive workloads to

Chapter 14. DASD PerformanceThis chapter discusses DASD subsystems available for the System i platform. There are two separate considerations. Befo

14.1.0 Direct Attach (Native)14.1.1 Hardware Characteristics 14.1.1.1 Devices & ControllersN/AN/AN/A24.03.515K280433DN/AN/AN/A24.03.515K140433

14.1.2 iV5R2 Direct Attach DASDThis section discusses the direct attach DASD subsystem performance improvements that werenew with the iV5R2 release.

14.1.2.225016582Restore25016582Save*SAVF2757 IOA1228341Restore1228341Save*SAVF45 Units30 Units15 Units2778 IOANumber of 35 GB DASD units (Measurement

14.1.3 571B iV5R4 offers two new options on DASD configuration. y RAID6 which offers improved system protection on supported IOAs. y NOTE: RAID6 i

14.1.4 571B, 5709, 573D, 5703, 2780 IOA Comparison ChartIn the following two charts we are modeling a System i 520 with a 573D IOA using RAID5,compar

The charts below are an attempt to allow the different IOAs available to be compared on a singlechart. An I/O Intensive Workload was used for our thr

14.1.5 Comparing Current 2780/574F with the new 571E/574F and 571F/575B NOTE: iV5R3 has support for the features in this section but all of our perf

14.1.6 Comparing 571E/574F and 571F/575B IOP and IOPLessIn comparing IOP and IOPLess runs we did not see any significant differences, including thesys

14.1.7 Comparing 571E/574F and 571F/575B RAID5 and RAID6 and MirroringSystem i protection information can be found at http://www.redbooks.ibm.com/ in

Note!Before using this information, be sure to read the general information under “Special Notices.”Twenty Fifth Edition (January/April/October 2008)

2.3 Server Model Differences Server models were designed for a client/server workload and to accommodate an interactive workload.When the interactive

In comparing Mirroring and RAID one of the concerns is capacity differences and the hardwareneeded. We tried to create an environment where the capac

14.1.8 Performance Limits on the 571F/575BIn the following charts we try to characterize the 571F/575B in different DASD configuration.The 15 DASD ex

14.1.9 Investigating 571E/574F and 571F/575B IOA, Bus and HSL limitations.With the new DASD controllers and IOPLess capabilities, IBM has created man

14.1.9.114.1.9.2IBM i 6.1 Performance Capabilities Reference - January/April/October 2008© Copyright IBM Corp. 2008 Chapter 14 DASD Performance 203La

14.1.10 Direct Attach 571E/574F and 571F/575B ObservationsWe did some simple comparison measurements to provide graphical examples for customers toobs

14.2 New in iV5R4M514.2.1 9406-MMA CEC vs 9406-570 CEC DASD IBM i 6.1 Performance Capabilities Reference - January/April/October 2008© Copyright IBM C

14.2.2 RAID Hot SpareFor the following test, the IO workload was setup to run for 14 hours. About 5 hours afterstarting A DASD was pulled from the

14.2.3 12X Loop Testing A 9406-MMA 8 Way system with 96 GB of mainstore and 396 DASD in #5786 EXP24 DiskDrawer on 3 12X loops for the system ASP were

14.3 New in iV6R1M014.3.1 Encrypted ASPMore CPU and memory may be needed to achieve the same performance once encryption isenabled. IBM i 6.1 Performa

IBM i 6.1 Performance Capabilities Reference - January/April/October 2008© Copyright IBM Corp. 2008 Chapter 14 DASD Performance 209Non Encrypted ASP

0 6/7 FullFraction of Interactive CPW020406080100Available CPU availableCFINTinteractiveCustom Server Model CPU Distribution vs. Interactive Util

14.3.2 57B8/57B7 IOAWith the addition of the POWER6 520 and 550 systems comes the new 57B8/57B7 SAS RaidEnnoblement Controller with Auxiliary Write Ca

The POWER6 520 and 550 also have an external SAS port, that is controlled by the 57B8/57B7,used to connect a single #5886 - EXP 12S SAS Disk Drawer wh

14.3.3 572A IOAThe 572A IOA is a SAS IOA that is mainly used for SAS tape attachment but the 5886 EXP 12SSAS Disk Drawer can also be attached. Perform

IBM i 6.1 Performance Capabilities Reference - January/April/October 2008© Copyright IBM Corp. 2008 Chapter 14 DASD Performance 213

14.4 SAN - Storage Area Network (External) There are many factors to consider when looking at external storage options, you can get moreinformation th

14.5 iV6R1M0 -- VIOS and IVM ConsiderationsBeginning in iV6R1M0, IBM i operating system will participate in a new virtualization strategyby becoming a

14.5.1 General VIOS Considerations14.5.1.1 Generic Concepts520 versus 512. Long time IBM i operating system users know that IBM i operating systemdi

14.5.1.2 Generic Configuration ConceptsThere are several important principles to keep track of in terms of getting good performance.Most of the follo

3. Prefer external disks attached directly to IBM i operating system over those attached viaVIOS This is basically a statement of the Fibre Channel

8. Ensure, within reason, a reasonable number of virtual disks are created and madeavailable to IBM i operating system. One is tempted to simply lum

2.4 Performance Highlights of Model 7xx Servers 7xx models were designed to accommodate a mixture of traditional “green screen” applications and more

14.5.1.3 Specific VIOS Configuration Recommendations -- Traditional (non-blade)Machines1. Avoid volume groups if possible. VIOS "hdisks" m

3. Limited number of virtual devices per virtual SCSI adapter. You will have to configuresome number of virtual SCSI adapters so that VIOS can provi

14.5.1.3 VIOS and JS12 Express and JS22 Express Considerations Most of our work consisted of measurements with the JS22 offering and external disks us

The chart above shows some basic performance scaling for 1, 2, 3 and 4 processors. For thiscomparison both partition measurements were done with the

The following charts are a view of the characteristics we observed during our CommercialPerformance Workload testing on our JS22 Express. The first c

In following single partition Commercial Performance Workload runs the average VIOS CPUstayed under 40%. So we seem to have VIOS resource available b

The following chart shows two IBM i operating system partitions using 14GB of memory and1.7 processors each served by 1 VIOS partition using 2GB of me

14.5.1.3.2 BladeCenter S and JS12 ExpressThe IBM i operating system is now supported on a JS12 Express in a BladeCenter S. Thesystem is limited to 1

14.5.1.3.3 JS12 Express and JS22 Express Configuration Considerations1. The aggregate total of virtual disks (LUNs) will be sixteen at most. Many c

14.5.1.3.4 DS3000/DS4000 Storage Subsystem Performance TipsPhysical disks can be configured various ways with RAID levels, number of disks in eacharr

2.5 Performance Highlights of Model 170 Servers iSeries Dedicated Server for Domino models will be generally available on September 24, 1999. Please

IBM i 6.1 Performance Capabilities Reference - January/April/October 2008© Copyright IBM Corp. 2008 Chapter 14 DASD Performance 230Blade Center H wit

14.6 IBM i operating system 5.4 Virtual SCSI PerformanceThe primary goal of virtualization is to lower the total cost of ownership of equipment byimp

In the test results that follow, we see the CPU required for IBM i operating system Virtual SCSIserver and the benefits of the IBM i operating system

14.6.1 IntroductionIn general, applications are functionally isolated from the exact nature of their storagesubsystems by the operating system. An ap

All measurements were completed on a POWER5 570+ 4-Way (2.2 GHz). Each system isconfigured as an LPAR, and each virtual SCSI test was performed betwe

14.6.2.1 Native vs. Virtual Performance Figure 1 shows a comparison of measured bandwidth using virtual SCSI and local attachedDASD for reads with va

14.6.2.3 Virtual SCSI Bandwidth-Network Storage Description (NWSD) ScalingFigure 3 shows a comparison of measured bandwidth while scaling network sto

14.6.2.4 Virtual SCSI Bandwidth-Disk ScalingFigure 4 shows a comparison of measured bandwidth while scaling disk drives with varyingblock sizes of op

14.6.3 SizingSizing methodology is based on the observation that processor time required to perform an I/Oon the IBM i operating system Virtual SCSI

To calculate IBM i operating system Virtual SCSI CPU requirements the following formula isprovided. The number of transactions per second could be co

The next chart shows the performance capacity of the current and previous Model 170 servers.Previous vs. Current AS/400e server 170 Performance* Uncon

14.6.3.2 Sizing when using Micro-Partitioning Defining Virtual SCSI servers in micro-partitions enables much better granularity of processorresource

14.6.3.3 Sizing memoryThe IBM i operating system Virtual SCSI server supports data read caching on the virtual hosteddisk server partition. Thus all

14.6.4 AIX Virtual IO Client Performance GuideThe following is a link which will direct you to more in-depth performance tuning for AIXvirtual SCSI c

Chapter 15. Save/Restore PerformanceThis chapter’s focus is on the IBM i operating system platform. For legacy system models, olderdevice attachment

15.2 Save Command Parameters that Affect PerformanceUse Optimum Block Size (USEOPTBLK)The USEOPTBLK parameter is used to send a larger block of data

15.3 WorkloadsThe following workloads were designed to help evaluate the performance of single, concurrent andparallel save and restore operations fo

15.4 Comparing Performance DataWhen comparing the performance data in this document with the actual performance on your system,remember that the perf

15.5 Lower Performing Backup DevicesWith the lower performing backup devices, the devices themselves become the gating factor so the saverates are ap

15.8 The Use of Multiple Backup DevicesConcurrent Saves and Restores - The ability to save or restore different objects from a singlelibrary/directo

15.9 Parallel and Concurrent Library Measurements This section discusses parallel and concurrent library measurements for tape drives, while sections

and higher than normal CFINT values. The goal is to avoid exceeding the threshold (knee of the curve)value of interactive capacity.2.8 Interactive U

15.9.2 Large File ConcurrentFor the concurrent testing 16 libraries were built, each containing a single 320 GB file with 80 4 GBmembers. The file s

15.9.3 Large File ParallelFor the measurements in this environment, BRMS was used to manage the save and restore, takingadvantage of the ability buil

15.9.4 User Mix ConcurrentUser Mix will generally portray a fair population of customer systems, where the real data is a mixture ofprograms, menus,

15.10 Number of Processors Affect Performance With the Large Database File workload, it is possible to fully feed two backup devices with a singlepro

15.11 DASD and Backup Devices Sharing a TowerThe system architecture does not require that DASD and backup devices be kept separated. Testing in the

15.12 Virtual TapeVirtual tape drives are being introduced in iV5R4 so those customers can make use of the speed ofsaving to DASD, then save the dat

The following measurements were done on a system with newer hardware including a 3580 Ultrium 34Gb Fiber Channel Tape Drive, 571E storage adapters, an

15.13 Parallel Virtual TapesNOTE: Virtual tape is reading and writing to the same DASD so the maximum throughput with ourconcurrent and parallel meas

15.14 Concurrent Virtual TapesNOTE: Virtual tape is reading and writing to the same DASD so the maximum throughput with ourconcurrent and parallel me

15.15 Save and Restore Scaling using a Virtual Tape Drive. A 570 8 way System i was used for the following tests. A user ASP was created using up to

Now if the interactive CPU is held to less than 4% CPU (the knee), then the CPU available for theSystem, Batch, and Client/Server work is 100% - the I

15.16 Save and Restore Scaling using 571E IOAs and U320 15K DASD units to a 3580Ultrium 3 Tape Drive.A 570 8 way System i was used for the following

IBM i 6.1 Performance Capabilities Reference - January/April/October 2008© Copyright IBM Corp. 2008 Chapter 15. Save/Restore Performance 261User Mix

15.17 High-End Tape Placement on System i The current high-end tape drives (ULTRIUM-2 / ULTRIUM-3 and 3592-J / 3592-E) need to be placedcarefully on

15.18 BRMS-Based Save/Restore Software Encryption and DASD-Based ASP Encryption The Ultrium-3 was used in the following experiments, which attempt to

Performance will be limited to the native drive rates (shown in table 15.1.1) because encrypted datablocks have a very low compaction ratio.IBM i 6.1

15.19 5XX Tape Device RatesNote: Measurements for the high speed devices were completed on a 570 4 way system with 2844 IOPsand 2780 IOA’s and 180

3419R3419SNetwork Storage Space2915R2915SDomino Mail Files97R2515SMany DirectoriesMany Objects128R2312S1 Directory Many Objects3237R3239SLarge File 3

15.20 5XX Tape Device Rates with 571E & 571F Storage IOAs and 4327 (U320) Disk UnitsSave/restore rates of 3580 Ultrium 3 (2Gb and 4Gb Fiber Chann

15.21 5XX DVD RAM and Optical Library9.89.89.89.89.69.6R2.62.62.02.01.81.8SNetwork Storage Space9.89.89.89.89.69.6R2.62.62.02.01.81.8SDomino Mail Fil

15.22 Software CompressionThe rates a customer will achieve will depend upon the system resources available. This test was run in avery favorable en

If customers modify an IBM-supplied class description, they are responsible for ensuring the priorityvalue is 35 or less after each new release or cu

15.23 9406-MMA DVD RAM 14.014.0R2.22.2SNetwork Storage Space14.514.5R2.32.3SDomino Mail Files5.55.5R2.22.2SMany DirectoriesMany Objects9.09.0R2.32

15.24 9406-MMA 576B IOPLess IOA 700700750650650650450R700330650550580575450SDomino Mail Files26262727272826R38384040404040SManyDirectoriesMany Obj

15.25 What’s New and Tips on PerformanceWhat’s NewiV6R1M0March 2008BRMS-Based Save/Restore Software Encryption and DASD-Based ASP Encryption576B IOPL

Chapter 16 IPL Performance Performance information for Initial Program Load (IPL) is included in this section. The primary focus of this section is

16.3 9406-MMA System Hardware Information 16.3.1 Small system Hardware Configuration 9406-MMA 7051 4 way - 32 GB Mainstore DASD / 30 70GB 15K rpm arms

16.4 9406-MMA IPL Performance Measurements (Normal) The following tables provide a comparison summary of the measured performance data for a normal an

16.6 NOTES on MSDMSD is Mainstore Dump. General IPL phase as it relates to the SRCs posted on the operation panel: Processor MSD includes the D2xx xx

16.7 5XX System Hardware Information16.7.1 5XX Small system Hardware Configuration520 7457 2 way - 16 GB MainstoreDASD / 23 35GB 15K rpm arms,RAID Pro

16.8 5XX IPL Performance Measurements (Normal)The following tables provide a comparison summary of the measured performance data for a normal andabnor

16.10 5XX IOP vs IOPLess effects on IPL Performance (Normal)Measurement units are in minutes and seconds. 28:1826:59Total2:522:32OS/4007:206:43SLIC1

Server Dynamic Tuning RecommendationsOn the new systems and mixed mode servers have the QDYNPTYSCD and QDYNPTYADJ systemvalue set on. This preserves

Chapter 17. Integrated BladeCenter and System x PerformanceThis chapter provides a performance overview and recommendations for the Integrated xSeri

Integrated xSeries Servers (IXS)An Integrated xSeries Server is an Intel processor-based server on a PCI-based interface card that plugsinto a host sy

y Write Cache PropertyWhen the disk device write cache property is disabled, disk operations have similar performancecharacteristics to shared disks.

y With iSCSI, there are some Windows side disk configuration rules you must take into account toenable efficient disk operations. Windows disks should

2. Vary on any Network Server Description (NWSD) with a Network server connection type of *ISCSI.During the iSCSI network server vary on processing th

IXS and IXA I/O operations (disk, tape, optical and virtual Ethernet) communications occur through theindividual IXS and IXA IOP resource. This IOP i

2.5 MBytes22.5 MBytesTotal:1 MByte120.5 MByteQFPHIS Private Pool:0.5 MByte1 MByteBase Pool: 1 MByte21 MBytes Machine Pool: For Each NWSDFor Each Targe

CPW per 1k Disk Operations0100200300400500600512 Write1k Write2k Write4k Write8k Write16k Write24k Write32k Write64k Write512 Read1k Read2k Read4k Rea

y A storage space which is linked as shared, or a disk with caching disabled, requires more CPU toprocess write operations (approx. 45%). y Sequential

The blue square line shows an iSCSI connection with a single target iSCSI HBA - single initiator iSCSIHBA connection, configured to run with standard

2.10 Managing Interactive CapacityInteractive/Server characteristics in the real world.Graphs and formulas listed thus far work perfectly, provided t

than an IXS or IXA attached VE connection. “Stream” means that the data is pushed in one direction,with only the TCP acknowledge packets running in th

The chart above shows the CPW efficiency of operations (larger is better). Note the CPW per Mbits/secscale on the left - as it’s different for each c

The legend label “Mixed Files” indicates a save of many files of mixed sizes - equivalent to the save ofthe Windows system file disk. “Large files” in

Choose V5R4. In the “Contents” panel choose “iSeries Information Center”.Expand “Integrated operating environments” and then “Windows environment on i

Chapter 18. Logical Partitioning (LPAR)18.1 IntroductionLogical partitioning (LPAR) is a mode of machine operation where multiple copies of operating

y Allocate fractional CPUs wisely. If your sizing indicates two partitions need 0.7 and 0.4 CPUs, see ifthere will be enough remaining capacity in on

The reasons for the LPAR overhead can be attributed to contention for the shared memory bus on apartitioned system, to the aggregate bandwidth of the

Also note that part of the performance increase of an larger system may have come about because of areduction in contention within the CPW workload it

LPAR Throughput Increase12-way 8-way+4-way 2 x 6-way 3 x 4-wayLPAR Configuration460047004800490050005100520053005400Total CPW of all PartitionsTotal

18.4 LPAR MeasurementsThe following chart shows measurements taken on a partitioned 12-way system with the system’s CPUutilized at 70 percent capacity

Table of Contents624.14 Performance References for DB2...614.13 Reuse Deleted Record Space...

There are other means for determining interactive utilization. The easiest of these is the performancemonitoring function of Management Central, which

The following chart shows projected LPAR capacities for several LPAR configurations. The projectionsare based on measurements on 1 and 2 way measurem

Chapter 19. Miscellaneous Performance Information19.1 Public Benchmarks (TPC-C, SAP, NotesBench, SPECjbb2000, VolanoMark)iSeries systems have been r

The most commonly run of these is the SAP-SD (Sales and Distribution) benchmark. It can be run in a2-tier environment, where the application and datab

This web site is primarily focused on results for systems that the Volano company measures themselves.These results tend to be for much smaller, Intel

of relatively lower delay cost.y Waiting TimeThe waiting time is used to determine the delay cost of a job at a particular time. The waiting time ofa

y Priority 47-51y Priority 52-89y Priority 90-99Jobs in the same group will have the same resource (CPU seconds and Disk I/O requests) usagelimits. I

less CPU utilization resulting in slightly lower transaction rates and slightly longer response times.However, the batch job gets more CPU utilization

of printers in the configuration. 70% of the remaining memory is allocated to the interactive pool; 30% tothe base pool.A QPFRADJ value of 1 ensures t

files of differing characteristics are being accessed. The pool attribute can be changed from *FIXED to*CALC and back at any time, so making a change

To determine a reasonable level of page faulting in user pools, determine how much the paging isaffecting the interactive response time or batch throu

2. A similar effect can be found with index builds. If parallelism is enabled, index creation (CRTLF,Create Index, Open a file with MAINT(*REBUILD), o

NOTE:It is very difficult to predict the improvement of adding storage to a pool, even if the potential gaincalculated above is high. There may be in

0 100 200 300 400 500 600Number of PC Clients020406080100120140160180200220240Total Collection Time (min)AS/400 NetFinity Software Inventory Performan

Conclusions/Recommendations for NetFinity1. The time to collect hardware or software information for a number of clients is fairly linear.2. The size

Chapter 20. General Performance Tips and Techniques This section's intent is to cover a variety of useful topics that "don't fit"

ProblemIt is too easy to use the overall pool's value of MAXACT as a surrogate for controlling the number of Jobs. That is, you can forget the

20.2 General Performance Guidelines -- Effects of CompilationIn general, the higher the optimization, the less easy the code will be to debug. It may

20.3 How to Design for Minimum Main Storage Use (especially with Java, C, C++)The iSeries family has added popular languages whose usage continues to

Where a and b are constants. “a” is determined by adding up things like the static storage taken up by theapplication program. “b” is the size of th

SQL records in a resultsetProgram stack storageJava Virtual Machineand most WebSpherestorageSystem valuesOperating Systemcopies (e.g. Data Base)copies

How practical this change would be, if it represented a large, existing data base, would be a separatequestion. If this is at the initial design, how

2.11 Migration from Traditional ModelsThis section describes a suggested methodology to determine which server model is appropriate tocontain the in

One thing easily misunderstood is variable length characters. At first, one would think every characterfield should be variable length, especially if

20.4 Hardware Multi-threading (HMT)Hardware multi-threading is a facility present in several iSeries processors. The eServer i5 modelsinstead have th

HMT and SMT Compared and ContrastedSome key similarities and differences are:ySMT can improve throughput up to 40 per cent,in rare cases, higher.yHMT

20.5 POWER6 520 Memory ConsiderationsBecause of the design of the Power6 520 system, there are some key factors with the memorysubsystem that one shou

activation time. This means that a partition that requires 4 GB of memory could be assigned 2 GB fromthe quad with 4 GB DIMMs and the other 2 GB from

floating-point data may be copied using the floating-point loads and store, resulting in an alignmentinterrupt. As an example, consider the followin

Chapter 21. High Availability PerformanceThe primary focus of this chapter is to present data that compares the effects of high availability scenarios

· Inactive switchover - The switching time is measured from the point at which the CHGCRGPRIcommand is issued from the primary system which has no wor

Switchover MeasurementsNOTE: The information that follows is based on performance measurements and analysis done in theServer Group Division laborator

Active State: In geographic mirroring, pertaining to the configuration state of a mirror copy that indicatesgeographic mirroring is being performed,

*********************************************************************************** Compo

Workload ConfigurationThe wide variety of hardware configurations and software environments available make it difficult tocharacterize a ‘typical’ hig

Geographic Mirroring MeasurementsNOTE: The information that follows is based on performance measurements and analysis done in theIBM Server Group Divi

Geographic Mirroring Tips• For a quicker switchover time, keep the user-ID (UID) and group-ID (GID) of user profiles that own objects on the IASP the

Chapter 22. IBM Systems Workload Estimator 22.1 OverviewThe IBM Systems Workload Estimator (a.k.a., the Estimator or WLE), located at: http://www.ibm

typical disclaimers that go with any performance estimate ("your experience might vary...") are especiallytrue. We provide these sizing esti

account features like detailed journaling, resource locking, single-threaded applications, time-limitedbatch job windows, or poorly tuned environments

Appendix A. CPW and CIW Descriptions"Due to road conditions and driving habits, your results may vary." "Every workload is different.&

CPW Application DescriptionThe CPW application simulates the database server of an online transaction processing (OLTP)environment. Requests for trans

A.2 Compute Intensive Workload - CIWUnlike CPW values, CIW values are not derived from specific measurements of a single workload. Theyare modeled pr

category that often fits into the CIW-like classification is overnight batch. Even though batch jobs oftenprocess a great deal of database work, there

one third of the total possible interactive workload, for non-custom models. The equation shown in thissection will migrate a traditional system to a

Appendix B. System i Sizing and Performance Data Collection Tools The following section presents some of the alternative tools available for sizing a

B.1 Performance Data Collection ServicesCollecting performance data with Collection Services is an operating system function designed to runcontinuou

predefined profile containing commonly used categories. For example, if you do not have a need tomonitor the performance of SNADS transaction data on

http://www.ibm.com/servers/eserver/iseries/perfmgmt/batch.htmlUnzip this file, transfer to your System i platform as a save file and restore library Q

Appendix C. CPW and MCU Relative Performance Values for System iThis chapter details the relative system performance values: y Commercial Processing

C.1 V6R1 Additions (October 2008)C.1.1 CPW values for the IBM Power Systems - IBM i operating system77600568004030021600110002x4MB / 32MB5.07388570

2. Memory speed differences account for some slight variations in performance differencebetween models. 3. CPW values for Power System models introd

4800-180001 - 42x4MB / 32MB42004966550 (9409-M50)4300-83001 - 22x4MB / 0MB42005634520 (9408-M25)430012x4MB / 0MB42005633520 (9407-M15)Processor CPWCPU

138003.7 of 4 (3)2x4MB / 0 MB400052BEn/an/aJS22 (7998-61X)110403 of 4 (2)2x4MB / 0 MB400052BEn/an/aJS22 (7998-61X)Processor CPWCPUsL2/L3 cache (1)per

6100280028001(3)1.9/36MB1900NA77359406-520 6100280028001(3)1.9/36MB1900NA7374(5)9406-520 82000380011.9/36MB1900NA7691(10)9406-52082000380011.9/36MB190

2.13 iSeries for Domino and Dedicated Server for Domino Performance Behavior In preparation for future Domino releases which will provides support

NR - 6600 (9)30600-3100 9 1(3)1.9MB/NA1900768071409405-520NR - 6600 (9)30600-3100 9 1(3)1.9MB/NA1900768171419405-520 NR - 6600 (9)30600-3100 9 1(3)1

NA recommended30500 1 (3) NA1.9 MB1500520-0900 (7450)2300601000 1 (3) NA1.9MB1500 520-0901 (7451)230010001000 1 (3) NA1.9 MB1500520-0902 (7552)5230

8. The 64-way is measured as two 32-way partitions since i5/OS does not support a 64-way partition. 9. IBM stopped publishing CIW

C.8.2 Model 810 and 825 iSeries for Domino (February 2003)31003800102012 MB540810-2466 (7407)42005300147014 MB750810-2467 (7410)79009500270024 MB750

10680 - 209101630 - 322045504200-73504 - 84 MB540830-2349 (1537)10680 - 209101630 - 322020004200-73504 - 84 MB540830-2349 (1536)10680 - 209101630 -

C.10.1 Model 8xx Servers77800109502000202002416 MB600840-2461 (1544)77800109501050202002416 MB600840-2461 (1543)7780010950560202002416 MB600840-24

778001095020200202002416 MB600840-2461 (1548)778001095016500202002416 MB600840-2461 (1547)778001095010000202002416 MB600840-2461 (1546)778001095045

C.10.4 Capacity Upgrade on-demand ModelsNew in V4R5 (December 2000) , Capacity Upgrade on Demand (CUoD) capability offered for the iSeries Model 84

59600 - 778008380 - 109502020016500 - 2020018 - 2416 MB600840-2354 (1548)59600 - 778008380 - 109501650016500 - 2020018 - 2416 MB600840-2354 (1547)59

C.11 V4R5 AdditionsFor the V4R5 hardware additions, the tables show each new server model characteristics and itsmaximum interactive CPW capacity. Fo

Domino-Complementary ProcessingPrior to V5R1, processing that did not spend the majority of its time in Domino code was considerednon-Domino processin

1650016500248 MB500840-2420 (1547)1000016500248 MB500840-2420 (1546)455016500248 MB500840-2420 (1545)200016500248 MB500840-2420 (1544)105016500248

C.11.4 SB Models12016500248 MB500SB3-231812010000128 MB500SB3-231670735084 MB540SB2-2315Interactive CPWProcessor CPW* CPUsL2 cache per CPUChip Speed

5308.345504550128 MB262740-2070 (1513)427036604550128 MB262740-2070 (1512)2333.320004550128 MB262740-2070 (1511)122510504550128 MB262740-2070 (151

Note: the CPU not used by the interactive workloads at their Max CPW is used by the system CFINTnnjobs. For example, for the 2386 model the interacti

C.13 AS/400e Model Sxx Servers For AS/400e servers the knee of the curve is about 1/3 the maximum interactive CPW value. 0.92.721.36423401222611.23.6

2.67.710.932.2650.04n/a21573910.732.2598.04n/a21564.513.510.732.2319.02n/a21556.820.315.932.2188.21n/a215453S8.923.812.032.2138.01n/a2122103010.732.21

238,073.64 95,229.464.0B396,789.40158,715.763.1H122313164,655.74 65,862.294.0B274,426.23109,770.493.1H82312FI ds/hr @ 65% CPU UtilizationSD ds/hr @

C.18 AS/400 CISC Model Capacities16.83.9356121179.63.9340121157.32.992412114P037.32.1161n/a P02CPWDisk (GB) MaximumMemory (MB) MaximumCPUsFeatureM

177.425615364F97148.825612804F95127.725610243F90116.625611524E9597.12567682F8096.725610243E9069.42565122E8057.02565121F7056.62563842D8040.01463841F603

Similar to previous DSD performance behavior for interactive processing, the Interactive CPW rating of 0allows for system administrative functions to

processing present in the Linux logical partition, and all resources allocated to the Linux logical partitioncan essentially be used as though it were

Chapter 3. Batch PerformanceIn a commercial environment, batch workloads tend to be I/O intensive rather than CPU intensive. Thefactors that affect

154References for JDBC ...153JDBC Performance Tuning Tips...

3.3 Tuning Parameters for BatchThere are several system parameters that affect batch performance. The magnitude of the effect for eachof them depend

improve performance by eliminating disk I/O operations.y If communications lines are involved in the batch application, try to limit the number ofcomm

Chapter 4. DB2 for i5/OS PerformanceThis chapter provides a summary of the new performance features of DB2 for i5/OS on V6R1, V5R4 andV5R3, along wi

y DB2 Multisystem tablesNew function available in V6R1 whose use may affect SQL performance are derived key indexes,decimal floating point data type s

the statement is complete. The implementation to invoke the locking causes a physical DASD write tothe journal for each record, which causes journal

Table Expressions (RCTE) which allow for more elegant and better performing implementations ofrecursive processing. In addition, enhancements have be

Enhancements to extend the use of materialized query tables (MQTs) were added in i5/OS V5R4. Newsupported function in MQT queries by the MQT matching

SQL queries which continue to be routed to CQE in i5/OS V5R3 have the following attributes:y Tables with select/omit logicals over themy References to

Partitioned Table SupportTable partitioning is a new feature introduced in i5/OS V5R3. The design is localized on an individualtable basis rather tha

y Statistical Strategiesy SMP Considerationsy Administration Examples (Adding a Partition, Dropping a Partition, etc.)Materialized Query Table Support

19514.1.3 571B ...19314.1.2 iV5R2 Direct Attach DASD...

more information may be used in the query plan costing phase than was available to the optimizerpreviously. The optimizer may now use newly implement

should be made to determine if the needed statistics are available. Also in environments where longrunning queries are run only one time, it may be b

SQE for V5R2 SummaryEnhancements to DB2 for i5/OS, called SQE, were made in V5R2. The SQE enhancements are objectoriented implementations of the SQE o

4.6 DB2 Symmetric Multiprocessing feature IntroductionThe DB2 SMP feature provides application transparent support for parallel query operations on a

limit the amount of data it brings into and keeps in memory to a job’s share of memory. The amount ofmemory available to each job is inversely propor

y Allows customers to replace current programming methods of capturing and transmitting journalentries between systems with more efficient system prog

There are 3 sets of tasks which do the SMAPP work. These tasks work in the background at low priorityto minimize the impact of SMAPP on system perfor

multiple nodes in the cluster, access to the database files is seamless and transparent to the applicationsand users that reference the database. To t

4.10 Referential IntegrityIn a database user environment, there are frequent cases where the data in one file is dependent upon thedata in another fi

The following are performance tips to consider when using triggers support:y Triggers are activated by an external call. The user needs to weigh the b

244Data Compaction (COMPACT)...244Data Compression (DTACPR)...

To create the variable length field just described, use the following DB2 statement:CREATE TABLE library/table-name (field VARCHAR(50) ALLOCATE(

01 DESCR. 49 DESCR-LEN PIC S9(4) COMP-4. 49 DESCRIPTION PIC X(40). EXEC SQL FETCH C1 INTO DESC

In contrast, when reuse is active, the database support will process the added record more like an updateoperation than an add operation. The databas

2. The System i information center section on DB2 for i5/OS under Database and file systems hasinformation on all aspects of DB2 for i5/OS including t

Chapter 5. Communications PerformanceThere are many factors that affect System i performance in a communications environment. This chapterdiscusses

y IBM’s Host Ethernet Adapter (HEA) integrated 2-Port 10/100/1000 Based-TX PCI-E IOA supportschecksum offloading, 9000-byte jumbo frames (1 Gigabit on

Notes:1. Unshielded Twisted Pair (UTP) card; uses copper wire cabling2. Uses fiber optics3. Custom Card Identification Number and System i Feature Cod

To demonstrate communications performance in various ways, several workload scenarios are analyzed.Each of these scenarios may be executed with regula

75.010.43 Sessions70.010.52 Sessions42.010.81 Session 15 Disk Units ASP on 2757 IOA1 Disk Unit ASP on 2757 IOAFTPPerformance in MB per secondVirtual E

Notes:y Capacity metrics are provided for nonsecure transactionsy The table data reflects System i as a server (not a client)y The data reflects Socke

28317.2.3 iSCSI virtual I/O private memory pool...28217.2.2 iSCSI Disk I/O Operations:...

Notes:y Capacity metrics are provided for nonsecure and each variation of security policyy The table data reflects System i as a server (not a client)

Notes:y Capacity metrics are provided for nonsecure and each variation of security policyy The table data reflects System i as a server (not a client)

Notes:y Capacity metrics are provided for nonsecure and each variation of security policyy The table data reflects System i as a server (not a client)

y For additional information regarding your Host Ethernet Adapter please see your specificationmanual and the Performance Management page for future w

only a few seconds may perform best. Setting this value too low may result in extra error handlingimpacting system capacity. y No single station can

there is network congestion or overruns to certain target system adapters, then increasing the valuefrom the default=*NONE to 2 or something larger ma

• FTS is a less efficient way to transfer data. However, it offers built in data compression for linespeeds less than a given threshold. In some con

5.9 Additional InformationExtensive information can be found at the System i Information Center web site at: http://www.ibm.com/eserver/iseries/infoc

Chapter 6. Web Server and WebSphere Performance This section discusses System i performance information in Web serving and WebSphere environments.Spe

Information source and disclaimer: The information in the sections that follow is based onperformance measurements and analysis done in the internal

327Chapter 21. High Availability Performance ...32520.6 Aligning Floating Point Data on Power6...

y CGI: HTTP invokes a CGI program which builds a simple HTML page and serves it via the HTTPserver. This CGI program can run in either a new or a na

Notes/Disclaimers:y Data assumes no access logging, no name server interactions, KeepAlive on, LiveLocalCache offy Secure: 128-bit RC4 symmetric ciphe

Notes/Disclaimers:y Data assumes no access logging, no name server interactions, KeepAlive on, LiveLocalCache offy Secure: 128-bit RC4 symmetric ciphe

Notes/Disclaimers:y These results are relative to each other and do not scale with other environments.y IBM System i CPU features without an L2 cache

a. V5R4 provides similar Web server performance compared with V5R3 for most transactions (withsimilar hardware). In V5R4 there are opportunities to e

variable overhead of encryption/decryption, which is proportional to the number of bytes in thetransaction. Note the capacity factors in the tables a

11. HTTP and TCP/IP Configuration Tips: Information to assist with the configuration for TCP/IPand HTTP can be viewed at http://publib.boulder.ibm.

13. File System Considerations: Web serving performance varies significantly based on which filesystem is used. Each file system has different overhe

6.2 PHP - Zend Core for iThis section discusses the different performance aspects of running PHP transaction based applicationsusing Zend Core for i,

y Throughput - Orders Per Minute (OPM). Each order actually consists of 10 web requests to completethe order. y Order response time (RT) in millisecon

368C.18 AS/400 CISC Model Capacities...367C.17 AS/400 Models 4xx, 5xx and 6xx Systems...

Conclusions:1. The performance of each DB connection interface provides exceptional response time at very highthroughput. Each order processed consist

Conclusions:1. As stated earlier, persistent connections can dramatically improve overall performance. When usingpersistent connections for all transa

Conclusions:1. In both cases above, the overall system capacity improved significantly when using Zend Platform, byabout 15-35% for this workload. Wit

6.3 WebSphere Application ServerThis section discusses System i performance information for the WebSphere Application Server,including WebSphere Appl

because the improvements largely resulted from significant reductions in pathlength and CPU,environments that are constrained by other resources such

For WebSphere 5.1 and earlier refer to the Performance Considerations guide at:www.ibm.com/servers/eserver/iseries/software/websphere/wsappserver/prod

Trade 6 Benchmark (IBM Trade Performance Benchmark Sample for WebSphere Application Server)Description:Trade 6 is the fourth generation of the WebSphe

The Trade 6 application allows a user, typically using a Web browser, to perform the following actions:y Register to create a user profile, user ID/pa

WebSphere Application Server V6.1Historically, new releases of WebSphere Application Server have offered improved performance andfunctionality over p

Trade3 Measurement Results:Figure 6.2 Trade Capacity Resultsy Trade3 chart: WebSphere 5.0 was measured on both V5R2 and V5R3 on a 4 way (LPAR