Re: Snapshot as Backup
| От | Matt Clark |
|---|---|
| Тема | Re: Snapshot as Backup |
| Дата | |
| Msg-id | OAEAKHEHCMLBLIDGAFELKEBNEHAA.matt@ymogen.net обсуждение исходный текст |
| Ответ на | Snapshot as Backup ("Ed Murphy" <emurphy1@email.arizona.edu>) |
| Список | pgsql-admin |
The consensus from previous discussions (search for 'LVM' in the archives) is essentially that it definitely *should* work, some people *do* use it successfully, but that you *must* test it thoroughly in your own setup under heavy write load before relying on it.
PG will believe it has 'crashed' when you start it from a restored snapshot, and PG is designed to recover perfectly well from crashes. If you stop the postmaster before the snapshot is taken then it will definitely work fine.
Matt
-----Original Message-----
From: pgsql-admin-owner@postgresql.org [mailto:pgsql-admin-owner@postgresql.org]On Behalf Of Ed Murphy
Sent: 13 January 2004 17:16
To: pgsql-admin@postgresql.org
Subject: [ADMIN] Snapshot as BackupHello,I'm using Red Hat Enterprise v2.1 and PostgreSQL v7.3.4. Our hardware setup includes a large Storage Area Network (SAN). The systems folks are going to utilize a snapshot type backup to backup the file system. This snapshot will include PGDATA and all the PostgreSQL files. My question is if I restore this snapshot will PostgreSQL work? I know if doing a typical file system backup of PostgreSQL I must first stop the postmaster or the backup will not produce a useable PostgreSQL system. Is it necessary to stop the postmaster for this snapshot backup also?Thanks,Ed MurphyThe University of Arizona
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