-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 On Sat, 01 Mar 2008 10:06:54 -0800 Craig James <craig_james@xxxxxxxxxxxxxx> wrote: > We're upgrading to a medium-sized server, a Dell PowerEdge 2950, > dual-quad CPU's and 8 GB memory. This box can hold at most 8 disks > (10K SCSI 2.5" 146 GB drives) and has Dell's Perc 6/i RAID controller. > > I'm thinking of this: > > 6 disks RAID 1+0 Postgres data > 1 disk WAL > 1 disk Linux > > I've often seen RAID 1 recommended for the WAL. Is that strictly for > reliability, or is there a performance advantage to RAID 1 for the > WAL? > > It seems to me separating the OS and WAL on two disks is better than > making a single RAID 1 and sharing it, from a performance point of > view. This scares me... You lose WAL you are a goner. Combine your OS and WAL into a RAID 1. Sincerely, Joshua D. Drake - -- The PostgreSQL Company since 1997: http://www.commandprompt.com/ PostgreSQL Community Conference: http://www.postgresqlconference.org/ Donate to the PostgreSQL Project: http://www.postgresql.org/about/donate PostgreSQL SPI Liaison | SPI Director | PostgreSQL political pundit -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.6 (GNU/Linux) iD8DBQFHycSzATb/zqfZUUQRAs14AJ9pm3huW+z1j7jUIY7FbIZMzz2IxgCgnOhD yWiDabTYAG+x12JEqrf4q8E= =gBPs -----END PGP SIGNATURE----- ---------------------------(end of broadcast)---------------------------TIP 5: don't forget to increase your free space map settings
