SPECjAppServer2004 Result: WebSphere Application Server V7 on IBM xSeries BladeCenter HS21 and DB2 9.5 on IBM System p595

SPECjAppServer®2004 Result
Copyright © 2004 Standard Performance Evaluation Corporation

WebSphere Application Server V7 on IBM xSeries BladeCenter HS21 and DB2 9.5 on IBM System p595

22,634.13 SPECjAppServer2004 JOPS@Standard

Submitter:
IBM Corporation

SPEC license # 11

Test date:
Nov-2008

Software Products
WebSphere Application Server V7.0.0.1
WebSphere Application Server Community Edition 2.0
IBM J9 VM (build 2.4, J2RE 1.6.0 IBM J9 2.4 Linux x86-32)
IBM J9 VM (build 2.3, J2RE 1.5.0 IBM J9 2.3 Linux amd64-64)
IBM J9 VM (build 2.4, J2RE 1.6.0 IBM J9 2.4 AIX ppc-32)
IBM DB2 Universal JDBC Drivers
IBM DB2 9.5 FP3

Software Configurations
J2EE Application Servers
Emulator SW Config
Database SW Config
Primary Driver SW Config

Hardware Systems
J2EE Application Server HW (SUT Hardware)
Database Server HW (SUT Hardware)
Emulator HW (non-SUT hardware)
Load Driver Primary and Satellite (non-SUT hardware)

System Configuration Diagram

Benchmark
Modifications
Configuration
Bill of Materials
Other Info
General Notes
Full Disclosure Archive

SUT Configuration

J2EE Server Nodes:	16	DB Server Nodes:	1
J2EE Server CPUs:	128 cores, 32 chips, 4 cores/chip	DB Server CPUs:	64 cores, 32 chips, 2 cores/chip
J2EE Instances:	64	DB Instances:	1

Other SUT Components:
(4) 3com 4200G 48-port switch

Benchmark Settings

Dealer Injection Rate:	13,600	Ramp Up Time:	1,800 seconds
# of Dealer Agents:	64	Ramp Down Time:	300 seconds
# of Manufacturing Agents:	32	Steady State Time:	3,600 seconds
DB Load Injection Rate:	20,000	Trigger Time:	3,100 seconds

Detailed Results

Dealer Transaction Mix	Count	Tx. Mix
Purchase	12,302,513	25.00%
Manage	12,301,462	25.00%
Browse	24,597,925	49.99%
Total # Dealer Transactions	49,201,900

Total # Manufacturing Transactions	32,280,983

Response Times	Average	Maximum	90th%	Reqd
Purchase	0.23	46.73	0.70	2.00
Manage	0.20	36.54	0.60	2.00
Browse	0.28	94.80	0.90	2.00
Manufacturing	1.97	19.36	4.50	5.00

Reproducibility Run (SPECjAppServer2004 JOPS)	22,645.91

WebSphere Application Server V7.0.0.1

Vendor:	IBM Corporation	Availability:	Dec-2008
CTS Version:	5.0	Date Passed CTS:	Sep-2008
OS Name:	Red Hat Enterprise Linux 5 Server Update 2
EJB Protocol:	RMI/IIOP

WebSphere Application Server Community Edition 2.0

Vendor:	IBM Corporation	Availability:	Dec-2007
CTS Version:	1.5	Date Passed CTS:	Aug-2007
OS Name:	Novell SUSE Linux Enterprise Server 10 SP1
EJB Protocol:	RMI/IIOP

IBM J9 VM (build 2.4, J2RE 1.6.0 IBM J9 2.4 Linux x86-32)

Vendor:	IBM Corporation	Availability:	Dec-2008
OS Name:	Red Hat Enterprise Linux 5 Server Update 2

IBM J9 VM (build 2.3, J2RE 1.5.0 IBM J9 2.3 Linux amd64-64)

Vendor:	IBM Corporation	Availability:	Oct-2007
OS Name:	Novell SUSE Linux Enterprise Server 10 SP1

IBM J9 VM (build 2.4, J2RE 1.6.0 IBM J9 2.4 AIX ppc-32)

Vendor:	IBM Corporation	Availability:	Dec-2008
OS Name:	IBM AIX 5L v5.3 TL9

IBM DB2 Universal JDBC Drivers

Vendor:	IBM Corporation	Availability:	Sep-2008
OS Name:	Red Hat Enterprise Linux 5 Server Update 2

IBM DB2 9.5 FP3

Vendor:	IBM Corporation	Availability:	Dec-2008
OS Name:	IBM AIX 5L v5.3 TL9

J2EE Application Servers

J2EE Product:	WebSphere Application Server V7.0.0.1
JVM Product:	IBM J9 VM (build 2.4, J2RE 1.6.0 IBM J9 2.4 Linux x86-32)
JDBC Product:	IBM DB2 Universal JDBC Drivers
Hardware:	J2EE Application Server HW (SUT Hardware)
# of Instances:	16
Interfaces:
	Web Interface for the Dealer Domain
	Web Interface for the Supplier Domain
	EJB Interface for the Dealer Domain
	EJB Interface for the Manufacturing Domain
	EJB Interface for the Supplier Domain

Notes / Tuning Information

JVM Options:
-Djavax.xml.transform.TransformerFactory=org.apache.xalan.processor.TransformerFactoryImpl
-Djavax.xml.parsers.SAXParserFactory=org.apache.xerces.jaxp.SAXParserFactoryImpl
-Djavax.xml.parsers.DocumentBuilderFactory=org.apache.xerces.jaxp.DocumentBuilderFactoryImpl
-Djavax.xml.transform.TransformerFactory=org.apache.xalan.processor.TransformerFactoryImpl
-Dcom.ibm.ws.pm.grouppartialupdate=true -Xss128k -Xgcpolicy:gencon -Xtrace:none
-Xnoloa -Xmo1000m -Xmn1580m -Xgcthreads2 -Xdisableexplicitgc -Djava.net.preferIPv4Stack=true
-Dsun.net.inetaddr.ttl=0 -Xlp
EJB Cache Size = 10000
HTTP Channel maximum persistent requests = unlimited
HTTP Channel readTimeout = 6000
HTTP Channel writeTimeout = 6000
HTTP Channel persistentTimeout = 3000
Minimum Web Container threads = 26
Maximum Web Container threads = 26
Minimum ORB threads = 22
Maximum ORB threads = 22
Minimum Default/SIB threads = 1
Maximum Default/SIB threads = 5
Trace and PMI disabled
Log rotation disabled
Refer to files appservers/resources.xml, and appservers/server.xml
in the archive file.  They contain:
   datasource configuration,
   JVM command line parameters,
   and other J2EE configuration information

Emulator SW Config

J2EE Product:	WebSphere Application Server Community Edition 2.0
JVM Product:	IBM J9 VM (build 2.3, J2RE 1.5.0 IBM J9 2.3 Linux amd64-64)
Hardware:	Emulator HW (non-SUT hardware)
# of Instances:	1

Notes / Tuning Information

JVM Options:
-Xgcpolicy:gencon -Xms20g -Xmx20g -Xmn2g -Xss256k -verbose:gc
-Djava.net.preferIPv4Stack=true -Dsun.net.inetaddr.ttl=0 -Dnetworkaddress.cache.ttl=1
maxKeepAliveRequests = -1
maxThreads = 6000
acceptCount = 10000
connectionTimeout = 20000

Database SW Config

DB Product:	IBM DB2 9.5 FP3
Hardware:	Database Server HW (SUT Hardware)
# of Instances:	1

Notes / Tuning Information
Tuning performed by db2tune.sh script in the FDA

Primary Driver SW Config

JVM Product:	IBM J9 VM (build 2.4, J2RE 1.6.0 IBM J9 2.4 AIX ppc-32)
Hardware:	Load Driver Primary and Satellite (non-SUT hardware)
# of Instances:	17

Notes / Tuning Information
JVM Options: -Xms1024m -Xmx1024m -Xss128k -Dnetworkaddress.cache.ttl=0 -Djava.net.preferIPv4Stack=true -Dsun.net.inetaddr.ttl=0

J2EE Application Server HW (SUT Hardware) (SUT hardware)

Hardware Vendor:	IBM Corporation	OS Vendor:	Red Hat
Model Name:	IBM BladeCenter HS21	OS Name:	Red Hat Enterprise Linux 5 Server Update 2
Processor:	Quad Core Intel(R) Xeon(R) X5470	Filesystem:	EXT3
MHz:	3325	Disks:	1 x 73.4GB SAS 15K rpm
# of CPUs:	8 cores, 2 chips, 4 cores/chip	Network Interface:	4 built-in Gigabit Ethernet ports
Memory (MB):	16384	Other Hardware:	None
L1 Cache:	32KB(I)+32KB(D)	# of Systems:	16
L2 Cache:	2x6MB per chip	H/W Available:	Nov-2008
Other Cache:		OS Available:	Jun-2008

Notes / Tuning Information

fs.file-max = 1048576
kernel.sem = 250 32000 100 128
kernel.shmall = 4294967296
kernel.shmmax = 68719476736
net.core.netdev_max_backlog = 400000
net.core.optmem_max = 30000000
net.core.rmem_default = 30000000
net.core.wmem_default = 30000000
net.core.rmem_max = 30000000
net.core.wmem_max = 30000000
net.core.somaxconn = 300000
net.ipv4.conf.default.rp_filter = 1
net.ipv4.conf.default.accept_source_route = 0
net.ipv4.ip_forward = 0
net.ipv4.ip_local_port_range = 1024 65000
net.ipv4.tcp_fin_timeout = 10
net.ipv4.tcp_max_syn_backlog = 30000
net.ipv4.tcp_max_tw_buckets = 2000000
net.ipv4.tcp_mem  = 30000000 30000000 30000000
net.ipv4.tcp_rmem = 30000000 30000000 30000000
net.ipv4.tcp_wmem = 30000000 30000000 30000000
net.ipv4.tcp_timestamps = 0
net.ipv4.tcp_sack = 0
vm.nr_hugepages = 6000
net.ipv4.conf.all.arp_announce = 2
net.ipv4.conf.all.arp_ignore = 1
ifconfig eth(0-3) txqueuelen 60000
ethtool -K eth(0-3) tso on gso on
service iptables, irqbalance, auditd stop

Database Server HW (SUT Hardware) (SUT hardware)

Hardware Vendor:	IBM Corporation	OS Vendor:	IBM
Model Name:	IBM System p5 595	OS Name:	IBM AIX 5L v5.3
Processor:	POWER5+	Filesystem:	JFS2
MHz:	2100	Disks:	2x146.8GB Ultra320 SCSI, 15K RPM
# of CPUs:	64 cores, 32 chips, 2 cores/chip (SMT on)	Network Interface:	8 IBM 10/100/1000 Base-TX Ethernet PCI-X Adapter
Memory (MB):	393216	Other Hardware:	4 x IBM 4Gb dual-port Fibre Channel HBA connected to two IBM System Storage DS4800 storage controllers containing 96 x 36GB and 96 x 73GB disk drives
L1 Cache:	64KB(I)+32KB(D) on chip per core	# of Systems:	1
L2 Cache:	1920KB on chip per chip	H/W Available:	Aug-2006
Other Cache:	36MB off chip per DCM, 2 DCMs per SUT	OS Available:	Dec-2008

Notes / Tuning Information
vmo -o lgpg_regions=17500 lgpg_size=16777216 -o v_pinshm=1 /specdata1, /specdata2, /specdata3, /specdata4, /specdata5, /specdata6 /flatfiles mounted with "cio" option (-o cio)

Emulator HW (non-SUT hardware) (non-SUT hardware)

Hardware Vendor:	IBM Corporation	OS Vendor:	Novell
Model Name:	IBM System x3850 M2	OS Name:	Novell SUSE Linux Enterprise Server 10 SP1
Processor:	Intel Xeon Processor 7330	Filesystem:	Reiser
MHz:	2400	Disks:	2x73GB SAS, 15K RPM
# of CPUs:	16 cores, 4 chips, 4 cores/chip	Network Interface:	2-Port 10/100/1000 Base-TX PCI-X Adapter
Memory (MB):	32768	Other Hardware:
L1 Cache:	32KB(I)+32KB(D) on chip per core	# of Systems:	1
L2 Cache:	6144KB on chip per chip	H/W Available:	Aug-2007
Other Cache:	N/A	OS Available:	Aug-2007

Notes / Tuning Information

 ulimit -n 1000000
 ulimit -s unlimited
 vm.nr_hugepages = 0
 net.ipv4.ip_forward = 0
 net.ipv4.conf.default.rp_filter = 1
 net.ipv4.conf.default.accept_source_route = 0
 kernel.sysrq = 0
 kernel.core_uses_pid = 1
 kernel.shmmax = 20000000000
 kernel.sem = 250 32000 100 128
 fs.file-max = 262144
 net.ipv4.ip_local_port_range = 1024 65000
 net.core.rmem_default = 10000000
 net.core.wmem_default = 10000000
 net.core.rmem_max = 10000000
 net.core.wmem_max = 10000000
 net.core.optmem_max = 10000000
 net.ipv4.tcp_max_tw_buckets = 2000000
 net.ipv4.tcp_mem = 30000000 30000000 30000000
 net.ipv4.tcp_rmem = 30000000 30000000 30000000
 net.ipv4.tcp_wmem = 30000000 30000000 30000000
 net.ipv4.tcp_timestamps = 0
 net.ipv4.tcp_max_syn_backlog = 12000
 net.ipv4.tcp_fin_timeout = 10
 net.core.somaxconn = 15000
 net.core.netdev_max_backlog = 400000
 net.ipv4.conf.all.arp_announce = 2
 net.ipv4.conf.all.arp_ignore = 1

Load Driver Primary and Satellite (non-SUT hardware) (non-SUT hardware)

Hardware Vendor:	IBM Corporation	OS Vendor:	IBM
Model Name:	IBM System p 570 (4.7 GHz, 4 core)	OS Name:	IBM AIX 5L V5.3
Processor:	POWER6	Filesystem:	JFS2
MHz:	4700	Disks:	2 x 73.4GB SAS 15K rpm
# of CPUs:	4 cores, 2 chips, 2 cores/chip (SMT on)	Network Interface:	4 built-in Gigabit Ethernet ports
Memory (MB):	16384	Other Hardware:
L1 Cache:	64KB(I)+64KB(D) on chip per core	# of Systems:	17
L2 Cache:	4MB on chip per core	H/W Available:	Nov-2007
Other Cache:		OS Available:	Jun-2007

Notes / Tuning Information
ulimit -n 20000000 ulimit -c -d -f -m -t -v unlimited ulimit -u 262144

Benchmark Modifications
Schema Modifications: Tablespace sizes were increased to support the Injection rate. Scripts to create the DB are included in the FDA in the config and schema directory.
Load Program Modifications: No changes were made to the load program.

Benchmark Configuration Information
Isolation Requirement Info: The following beans: PartEnt, ComponentEnt, AssemblyEnt, BomEnt and LargeOrderEnt in the Manufacturing Domain, ItemEnt in the Orders Domain, and SupplierCompEnt and SupplierEnt in the Supplier Domain were accessed using READ_COMMITTED which is Cursor Stability (CS) for DB2. The remaining beans were accessed using REPEATABLE_READ which translates to DB2 isolation level of Read Stability (RS). The ItemEnt bean was cached for 20 minute intervals using the WebSphere Lifetime in Cache Mechanism. Only the data inside the bean was cached.
Durability Requirement Info: To ensure database durability, RAID1 was used for the database logs maintained on the external storage. A total of 96 x 36GB disks were used for the log.
Storage Requirement Info: Over the course of a 75 minute run at an injection rate of 13600, the database storage for database system increased by 15.04 GB. Given a linear scale, a 24 hour run at the same injection rate would increase storage for database system by 288.88 GB. Six RAID10 disk arrays were used to create the filesystem space for the database. Each array contained 16 x 73.4GB disks providing 587.2 GB of storage. The combined storage available for the database was 3523.2 GB.
Argument Passing Semantics: WebSphere Application Server V7 uses pass-by-value semantics by default.

Bill of Materials


on IBM xSeries BladeCenter HS21 and DB2 9.5 on IBM System p595

Supplier        IBM Blade Center H
     Product    Description                                              Qty
    --------    ---------------------------------------------           -----
    88524XU     IBM BladeCenter H                                       3 
    39Y9320     IBM BladeCenter Copper Passthrough                      6
    21P2165     3 Year Onsite Repair 24x7 2 Hour Response               3    

Supplier        IBM BladeCenter HS21 Blade
     Product    Description                                              Qty
    --------    ---------------------------------------------           -----
    8853-AC1    Blade 1:8853 Model AC                                   16
    0556        2GB PC2-5300 CL5 ECC DDR2 Chipkill FBDIMM 667MHz        128
    6985        Quad-Core Intel Xeon Processor x5470                    32
    2634        60mm High Function Dual Core or 8/12MB L2               16
    2969        Ethernet Expansion Card (CFFv) for IBM BladeCenter      16
    5545        IBM ServerBlade 73GB SAS 15K 2.5-inch SFF               16
    
Supplier        IBM System p5 595 Database Hardware
     Product    Description                                              Qty
    --------    ----------------------------------------------------    -----
    9119-595    Server 1:9119 Model 595                                 1 
    0265        AIX Partition Specify                                   1                     
    0319        FSP/Node Redundancy Enablement                          1                     
    2137        SCSI Cable, B&C TO Media Drawer, 1.5M, Mini-            1                     
                68P TO 68P                                                                                  
    3147        RIO-2 (Remote I/O-2) Cable, 3.5M                        4                     
    3279        146.8 GB 15,000 RPM Ultra320 SCSI Disk Drive            2                     
                Assembly                                                                                    
    3757        Service Shelf Tool Kit                                  1                     
    4502        0/16 GB 533MHz DDR2 CUoD Memory Card                    24                     
    5005        Software Preinstall                                     1                     
    5701        IBM 10/100/1000 Base-TX Ethernet PCI-X Adapter          4                     
    5736        PCI-X Dual Channel Ultra320 SCSI Adapter                1                     
    5752        4.7 GB SCSI DVD-RAM Drive                               1                     
    5759        4 Gb Dual-Port Fibre Channel PCI-X 2.0 DDR              2                     
                Adapter                                                                                     
    5791        I/O Drawer, 20 Slots, 16 Disk Bays                      1 
    5795        Media Drawer, Rack Mounted                              1                     
    6122        I/O Drw.Cbl.Grp, Prim.Rck/5U                            1                     
    6179        Power Cable, I/O Drawer to Media Drawer                 1                     
    6186        Bulk Power Regulator                                    6                     
    6861        Slim Line Doors for System Rack, Blue Stripe            1                     
    7668        Activation, #8968 #7705 CUoD Processor Book,            64      
                One: PROCESSOR 
    7669        1 GB Memory Activation for #4500, #4501,                384                     
                #4502 and #4503 Memory Cards                                                                
    7802        Ethernet Cable, 15M, Hardware Management                2                     
                Console to System Unit                                                                      
    7803        Bulk Power Controller Assembly                          2                     
    7807        Cooling Group, 2-4 Processor Books                      1                     
    7809        DC Power Converter, Processor Book                      9                     
    7810        Processor Clock Card, Programmable                      2                     
    7811        System Service Processor                                2                     
    7812        Multiplexer Card                                        3                     
    7818        Remote I/O-2 (RIO-2) Loop Adapter, Two Port             4                     
    7821        Pwr.Cbl.Grp, CEC Primary Fans                           1                     
    7822        Pwr.Cbl.Grp, 1st CEC Book                               1                     
    7823        Pwr.Cbl.Grp, 2nd CEC Book                               1                     
    7824        Pwr.Cbl.Grp, 3rd CEC Book                               1
    7825        Pwr.Cbl.Grp, 4rd CEC Book                               1                                          
    7826        Pwr.Cbl.Grp, 7807 Cooling Grp.                          1                     
    7837        Bulk Power Distribution Assembly                        4                     
    7992        Advanced POWER Virtualization                           64                     
    8688        Line Cord, 6AWG/Type W, 14ft, IEC309 60A                2                     
                Plug                                                                                        
    8970        16-Way POWER5+ 2.1GHz Turbo CUoD Processor              4      
                Book: 0-Way Active                                 
    9300        Language Group Specify - US English                     1
    21P2165     3 Year Onsite Repair 24x7 2 Hour Response               1
 
    1812-81A    DS4000 EXP810 Expansion Unit Model 81                   6  
    2410        SW 4Gbps SFP transcvr pair                              6                        
    5412        4 Gbps FC, 36.4 GB/15K E-DDM                            96                          
    5605        5m 50u Fiber Optic Cable (LC-LC)                        6                         
    9018        Attach to DS4800 (1815)                                 6                           
    9202        Field Integrate EXP810                                  6                              
    9800        Power Cord 125V/10A/2.8m,                               6 
    
    1812-81A    DS4000 EXP810 Expansion Unit Model 81                   6  
    2410        SW 4Gbps SFP transcvr pair                              6                          
    5433        4 Gbps FC, 73.4 GB/15K E-DDM                            96                          
    5605        5m 50u Fiber Optic Cable (LC-LC)                        6                         
    9018        Attach to DS4800 (1815)                                 6                           
    9202        Field Integrate EXP810                                  6                              
    9800        Power Cord 125V/10A/2.8m,                               6
        
    1815-82A    DS4800 Disk System Model 82 (4 GB Cache)                2     
    2410        SW 4Gbps SFP transcvr pair                              4                         
    5605        Fiber Cable 5m Multimode (LC-LC)                        4                      
    7711        DS4800 AIX Host Kit                                     2                       
    8870        DS4800 8-Storage Partitions                             2                       
    9202        Field Integrate DS4800                                  2                     
    9800        Power Cord 125V/10A, (Group 1)                          2                                   

Supplier        Miscellaneous Hardware
     Product    Description                                              Qty
    --------    -----------------------------------------------------   -----
    7310-C03    HMC 1:7310-C03 Desktop Hardw.Mgmt.Console               1
        8800    Quiet Touch Keyboard - USB, Business Black              1
        8841    Mouse - Business Black with Keyboard Attachment Cable   1
        3631    IBM C117 17" CRT Monitor                                1
        0569    HMC Support, 3 year, 24x7x4                             1
     1020899    3Com Switch 4200G 48-Port                               4
  3CXENPAK95    10GBASE-CX4 XENPAK Infiniband 4x Module                 6
      819638    3Com Switch 4200G 48-Port Support 1 year, 24x7x4        12
      
Supplier        Operating System Software	
     Product    Description                                                          Qty
    --------    ------------------------------------------------------------------  ----- 
    5692-A5L    IBM AIX 5L V5.3                                                       1
			
Supplier        Passport Advantage Software	
     Product    Description                                                          Qty
    --------    ------------------------------------------------------------------  ----- 
     D51NDLL    DB2 Enterprise Server Edition 9.5 Lic+SW Maint 12 Months              64  *
     E00BILL    DB2 Enterprise Server Edition 9.5 SW Maint Rewl 1 Anniv               128 *
     D55W8LL    IBM WebSphere Application Server V7 Lic+SW Maint 12 Months            128 **
     E1CBBLL    IBM WebSphere Application Server V7 SW Maintenance 12 Months          256 **
         		
* Note:  Pricing for DB2 is based on Value Units (VU).  Each Power5+ core is 100 VU.  
         64 core = 100 VU x 64 = 6400 VU.
** Note:  Pricing for WebSphere is based on Value Units (VU).  Each Intel x86 Xeon core is 50 VU.  
          128 core = 50 VU x 128 = 6400 VU.

Other Benchmark Information

  The switch ports and all network adapters are 1Gb/sec.
  
  This submission used the xerces implementation (version - XML4J 4.5) provided
  with WebSphere Application Server V7 in the IBM 1.6.0 JDK.
  
  Requests were sent to the AppServers using DNS round robin, with the
  database node acting as the DNS server.

General Notes

The only errors in the driver log files were those that are normally generated by this
benchmark.

The IBM DB2 Universal JDBC Drivers is a type 4 driver.

DB2 uses "Soft" checkpoint to ensure that no updates remain unflushed for
longer than the allowed time.

When DB2 UDB Server changes a database table with an update, insert, or delete
operation, the change is initially made in memory, not on disk. When there is
not enough space in the memory buffer to read in or write additional data pages,
DB2 UDB Server will make space by flushing some modified pages to disk.
Modified pages are also written to disk as part of the "Soft" checkpoint to
ensure that no updates remain unflushed for longer than the allowed time.
Before a change is made to the database, it is first recorded in the
transaction log. This ensures that the database can be recovered completely
in the event of a failure. Using the transaction log, transactions that
started but did not complete prior to a failure can be undone, and
transactions recorded as complete in the transaction log but not yet written
to disk can be redone.

DB2 UDB uses a write-ahead-logging protocol to guarantee recovery. This
protocol uses "Soft" checkpoint to write least-recently-used database pages
to disk independent of transaction commit. However, enough log information to
redo/undo the change to a database pages is committed to disk before the
database page itself is written. This protocol therefore renders checkpoint
unnecessary for DB2 UDB. For a more detailed description of the general
principles of the write-ahead-logging protocol, see the IBM research paper,
ARIES: A Transaction Recovery Method Supporting Fine Granularity Locking and
Partial Rollbacks Using Write-Ahead Logging," by C. Mohan, Database Technology
Institute, IBM Almaden Research Center. (http:// portal.acm.org/citation.cfm
?id=128770&coll=portal&dl=ACM&CFID=10343790&CFTOKEN=42047146)

1-phase transactions were used to coordinate the interaction between the database
server and JMS servers.

For questions about this result, please contact the submitter: IBM Corporation
For other inquiries, please contact webmaster@spec.org

Benchmark run on Fri Nov 07 08:24:41 CST 2008 by SPECjAppServer2004 v1.08
Result submitted on Wed Dec 17 03:33:21 EST 2008
Report generated by SPECjAppServer2004 Reporter v1.03

First published at SPEC.org on 31-Dec-2008