Mark Kirkwood <mark(dot)kirkwood(at)catalyst(dot)net(dot)nz> writes:
> I'm helping set up a Red Hat 5.5 system for Postgres. I was going to
> recommend xfs for the filesystem - however it seems that xfs is
> supported as a technology preview "layered product" for 5.5. This
> apparently means that the xfs tools are only available via special
> channels.
It also means that it's probably not production grade, anyway.
> What are Red Hat using people choosing for a good performing filesystem?
What's your time horizon? RHEL6 will have full support for xfs.
On RHEL5 I really wouldn't consider anything except ext3.
regards, tom lane