On Friday 23 Jul 2004 11:41 am, Steve wrote:
> Currently, the postgresql installation is on a single disk and so all
> the tables have their data read from a single disk. Searching on
> different tables by multiple users at the same time results in very slow
> searches, as it's mainly dependant on the spindle speed. I recently
> gained access to another server which has 3 SCSI disks. I know there is
> a way to mirror the tables across the three different disks but I'm not
> sure if it's as easy as symlinking the files (WAL files only?) across.
> Can anyone please tell me what to do here and how to harness the power
> of the three SCSI drives that I have. Which files in the data directory
> need to be moved? Is this safe? Can backups etc be easily done? Any
> information will be greatly appreciated. Thank you,
Postgresql 7.5 which is expected to enter in beta soon, has tablespace support
which can do these sort of things without resorting to any filesystem
changes. You can give it a try.
Or you can do a software RAID on these drives to speed up reads. That should
achieve similar effect.
HTH
Shridhar