Archive for Dezember 23rd, 2010

SourceForge.net: IOMeter 2008-06-22-rc2 – performance analysis tool

Donnerstag, Dezember 23rd, 2010

sourceforge_logo.jpg   IOMeter is an I/O subsystem measurement and characterization tool for single and clustered systems. It is used as a benchmark and troubleshooting tool and is easily configured to replicate the behaviour of many popular applications

 

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IOMeter is a great way of measuring your disk io performance with http://vmktree.org/iometer  a nice way to check if your system is performing optimally and to compare your results with others

The IOmeter Real Life – OpenPerformanceTest.icf (8GB) – use 8KB blocks and perform 65% read and 35% write actions for 2 minutes in a 40% sequential way and thus 60% random way

iometer_reallife_01.jpg 

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To use IOMeter on a linux server

# ./dynamo -i 192.168.1.7 -m 192.168.1.2

where 192.168.1.7 is the IP@ of the windows pc running IOMeter. 192.168.1.2 is IP@ of the linux server running dynamo

 

VMware vSphere 4.1 – Oracle Real Application Cluster Performance

Donnerstag, Dezember 23rd, 2010

vmware_logo.jpg   Oracle Real Application Clusters (RAC) is used to run critical databases with stringent performance requirements. A series of tests recently were run in the VMware performance lab to determine how an Oracle RAC database performs when running on vSphere 4.1

But Oracle has not certified any of its products on VMware virtualized environments. Oracle Support will assist customers running Oracle products on VMware in the following manner – Oracle will only provide support for issues that either are known to occur on the native OS or can be demonstrated not to be as a result of running on VMware