On Wed, Dec 20, 2006 at 06:42:20 +0000, Christian Kujau <lists@xxxxxxxxxxxxxxx> wrote: > On Tue, 19 Dec 2006, ext3@xxxxxxxxxxxxxx wrote: > >Basically I want to know if I can turn off full_page_writes in my postgres > >config. > > if your devices support write barriers, you can turn off this option, > methinks (mount -o barrier=1). Of course, you'll run a few tests before > going live, right? I have tested write barriers in FC5 using ext3 on top of sofware raid (raid 1 is the only type of raid that supports write barriers) and it seems to be working correctly. If you use this with the data=journal option I would expect you would be OK. It might be a good idea to check on the postgres list about the exact semantics you need for this. I also asked about write barriers on the dm-crypt list and they are supported there, but there is probably a problem with it on 2.6.19 kernels on SMP machines relating to a change to use per cpu work queues. _______________________________________________ Ext3-users mailing list Ext3-users@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/ext3-users
