-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 On 11/15/06 15:51, Martijn van Oosterhout wrote: > On Wed, Nov 15, 2006 at 03:25:38PM -0600, Ron Johnson wrote: >> However, what if the WAL is not on the SAN? You'd have to shut down >> pg anyway, in order to copy the WAL to a new directory, no? > > You have to copy the *entire* cluster, you cannot split out one > database, for example. Two postmaster instances cannot share data, > period. > >> Lastly: in order to do SAN splitting without risking your data, >> wouldn't you have to configure the disks as RAID-15 (mirrored >> RAID-5), since splitting a RAID10 would leave you with stripesets? > > As long as you get all the data it OK. I'm not 100% clear on what SAN > splitting is so I'm not totally sure. If it's anything like what happens on SCSI controllers, you can break a mirrorset and wind up with 2 identical JBODs. Similarly, you can break a RAID-10 set into 2 identical RAID-0 sets. - -- Ron Johnson, Jr. Jefferson LA USA Is "common sense" really valid? For example, it is "common sense" to white-power racists that whites are superior to blacks, and that those with brown skins are mud people. However, that "common sense" is obviously wrong. -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.5 (GNU/Linux) iD8DBQFFW5D2S9HxQb37XmcRAuH8AJ9UtfDrr1+3xhdoaivoKxxvz5hALACcDNuk mlRbye96rdaZDRGk8WG7YNU= =aCO2 -----END PGP SIGNATURE-----
