Jeff, > Let's say you had a server with 6 separate 15k RPM SCSI disks, what raid > option would you use for a standalone postgres server? > > a) 3xRAID1 - 1 for data, 1 for xlog, 1 for os? > b) 1xRAID1 for OS/xlog, 1xRAID5 for data > c) 1xRAID10 for OS/xlong/data > d) 1xRAID1 for OS, 1xRAID10 for data > e) ..... > > I was initially leaning towards b, but after talking to Josh a bit, I > suspect that with only 4 disks the raid5 might be a performance detriment > vs 3 raid 1s or some sort of split raid10 setup.
Knowing that your installation is read-heavy, I'd recommend (d), with the WAL on the same disk as the OS, i.e. RAID1 2 disks OS, pg_xlog RAID 1+0 4 disks pgdata -- --Josh Josh Berkus Aglio Database Solutions San Francisco ---------------------------(end of broadcast)--------------------------- TIP 1: subscribe and unsubscribe commands go to [EMAIL PROTECTED]
