On Fri, Aug 15, 2008 at 12:22 PM, Bruce Momjian <bruce@xxxxxxxxxx> wrote: > Mark Wong wrote: >> On Mon, Aug 4, 2008 at 10:04 PM, <david@xxxxxxx> wrote: >> > On Mon, 4 Aug 2008, Mark Wong wrote: >> > >> >> Hi all, >> >> >> >> We've thrown together some results from simple i/o tests on Linux >> >> comparing various file systems, hardware and software raid with a >> >> little bit of volume management: >> >> >> >> http://wiki.postgresql.org/wiki/HP_ProLiant_DL380_G5_Tuning_Guide > > Mark, very useful analysis. I am curious why you didn't test > 'data=writeback' on ext3; 'data=writeback' is the recommended mount > method for that file system, though I see that is not mentioned in our > official documentation. I have one set of results with ext3 data=writeback and it appears that some of the write tests have less throughput than data=ordered. For anyone who wants to look at the results details: http://wiki.postgresql.org/wiki/HP_ProLiant_DL380_G5_Tuning_Guide it's under the "Aggregate Bandwidth (MB/s) - RAID 5 (256KB stripe) - No partition table" table. Regards, Mark
