Good for you. You have time at hand to find out which one suits you best. Do the testing before you have load that needs another FS..:-)
Kinda my point is that when we've more load, we'd be using RAID-0 over RAID-5, or getting faster SCSI drives, or even turn fsync off if that's a bottleneck, because the different filesystems do not have that much performance difference -- the filesystem is not a bottleneck. Just need to tweak most of them a bit, like noatime,data=writeback.
 That is, AFAIK, from our testing. Please, please correct me if I'm wrong: has anyone found that different filesystems produces wildly different performance for postgresql, FreeBSD's filesystems not included?
Linux homer 2.4.18-14 #1 Wed Sep 4 13:35:50 EDT 2002 i686 i686 i386 GNU/Linux
7:00pm up 207 days, 10:05, 5 users, load average: 5.00, 5.03, 5.06
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