Le 28/07/2009 à 06:05:07-0600, Greg Spiegelberg a écrit > On Tue, Jul 28, 2009 at 1:46 AM, Albert Shih <Albert.Shih@xxxxxxxx> wrote: > > Hi all > > I'm not sure I understand > > http://www.postgresql.org/docs/8.3/interactive/ > continuous-archiving.html > > My problem: > > I've huge database ~ 1To (soon 2 To) and I need backup. > I can use pgdump because it's too long to do the backup. > So I like to use «continous-archiving». > > *SNIP* > before this moment I use «continuous-archiving» by put in my crontab > something like (every hours) > > rsync -av /databases/pgsql /databases/Archives > > is that correct ? > > And more important : How long I can keep this the rsync ? I mean after how > long it's good to make a new «big backup» ? > > > > Up to the rsync in your crontab your configuration looked good. Lose the > cron'd rsync. > > The first rsync executed between pg_start_backup() and pg_stop_backup() creates > the baseline / "full" backup of the database. Be sure you get tablespace > directories outside of the default PGDATA! The archive_command adds the WAL > logs as needed after and are the "incrementals". > > That's all you need for the backups. OK. Thanks you. At this moment I don't have tablespace ;-) > > How often do you need to create the baseline? Depends how many WAL logs are > being created and how quickly you want the recovery to be. I have a 800 GB > database and in one week over 4,000 WAL logs are created. This database setup > takes about 16-24 hours to recover. but at least 8 hours of that is restoring > the "full" and the remainder is applying the WAL logs. OK. For me that should be OK because my database don't have lot of modification in time. > > FWIW, I send all backup data (baseline & archived WALs) to a server which is > responsible for backing it up to tape. This allows the database server to be a > database server without busying itself with actual backups. The standby > server, eventually, will be used as a warm standby in case the primary crashes. > Thanks again for your help. Regards. -- Albert SHIH SIO batiment 15 Observatoire de Paris Meudon 5 Place Jules Janssen 92195 Meudon Cedex Téléphone : 01 45 07 76 26/06 86 69 95 71 Heure local/Local time: Mar 28 jul 2009 15:18:25 CEST -- Sent via pgsql-admin mailing list (pgsql-admin@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-admin
