My use case for opensolaris is as a storage server for a VM environment (we also use EqualLogic, and soon an EMC CX4-120). To that end, I use iometer within a VM, simulating my VM IO activity, with some balance given to easy benchmarking. We have about 110 VMs across eight ESX hosts. Here is what I do:
* Attach a 100G vmdk to one Windows 2003 R2 VM * Create a 32G test file (my opensolaris box has 16G of RAM) * export/import the pool on the solaris box, and reboot my guest to clear caches all around * Run a disk queue depth of 32 outstanding IOs * 60% read, 65% random, 8k block size * Run for five minutes spool up, then run the test for five minutes My actual workload is closer to 50% read, 16k block size, so I adjust my interpretation of the results accordingly. Probably I should run a lot more iometer daemons. Performance will increase as the benchmark runs due to the l2arc filling up, so I found that running the benchmark starting at 5 minutes into the work load was a happy medium. Things will get a bit faster the longer the benchmark runs, but this is good as far as benchmarking goes. Only occasionally due I get wacko results, which I happily toss out the window. Scott -- This message posted from opensolaris.org _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
