I've started collecting various data (including oprofile) using our DBT-2 (OLTP) workload with lvm2 on linux 2.6.2 and 2.6.3 on ia32 and ia64 platforms: http://developer.osdl.org/markw/lvm2/ So far I've only varied the stripe width with lvm, from 8 KB to 512 KB, for PostgreSQL that is using 8 KB sized blocks with ext2. It appears that a stripe width of 16 KB through 128KB on the ia64 system gives the best throughput for the DBT-2 workload on a volume that should be doing mostly sequential writes. I'm going to run through more tests varying the block size that PostgreSQL uses, but I wanted to share what I had so far in case there were other suggestions or recommendations. -- Mark Wong - - markw@osdl.org Open Source Development Lab Inc - A non-profit corporation 12725 SW Millikan Way - Suite 400 - Beaverton, OR 97005 (503) 626-2455 x 32 (office) (503) 626-2436 (fax) http://developer.osdl.org/markw/ _______________________________________________ linux-lvm mailing list linux-lvm@redhat.com https://www.redhat.com/mailman/listinfo/linux-lvm read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/
