Believe it or not, we haven't gotten many requests for this feature, partly because such corruption is so rare. Also, any checker isn't going to find a change from "Baker" to "Faker" in a text field.
--------------------------------------------------------------------------- Wes wrote: > On 9/4/04 5:28 PM, "Tino Wildenhain" <[EMAIL PROTECTED]> wrote: > > > Well, with such a huge database you probably should consider > > different backup strategies, a filesystem with snapshot > > support (XFS?) could help where you can copy a state of the database > > at any time - so you can backup the database cluster without > > stopping the postmaster. Also replication via slony could be > > an option. > > Yes, we are looking into using file system snapshots. We are currently > using primarily file system backups (shut down the DB, back up the file > system). The problem we ran into was that we didn't have a specific point > in time where we knew with absolute certainty the backed up database was > good - snapshots would not help here. > > I ended up starting with a recent backup, and working backwards until I > found one that wouldn't crash postmaster on a pg_dumpall. Rather than trust > that there was no corruption in that version (data blocks might be good, but > pg_dumpall doesn't test indexes), I did a pg_dumpall and reload. > > > The best tool to verify the backup is probably the postmaster > > itself. I really doubt any other program would be smaller and > > faster :) > > Not really... Postmaster won't tell you if a structure is bad until it > stumbles on it and crashes (or politely reports an error). Just because > postmaster comes up doesn't mean your database is good. As far as I know, > there is no "verify database" command option on postmaster - postmaster > won't fsck your database. > > Wes > > > ---------------------------(end of broadcast)--------------------------- > TIP 7: don't forget to increase your free space map settings > -- Bruce Momjian | http://candle.pha.pa.us [EMAIL PROTECTED] | (610) 359-1001 + If your life is a hard drive, | 13 Roberts Road + Christ can be your backup. | Newtown Square, Pennsylvania 19073 ---------------------------(end of broadcast)--------------------------- TIP 9: the planner will ignore your desire to choose an index scan if your joining column's datatypes do not match
