Le 29/09/2010 10:16, Michal Glowacki a écrit :
> Fujii, I believe I should follow this (from documentation):
>
> ************************
>
> The procedure for making a base backup is relatively simple:
>
> 1.
>
> Ensure that WAL archiving is enabled and working.
>
> 2.
>
> Connect to the database as a superuser, and issue the command
>
> SELECT pg_start_backup('label');
>
> where label is any string you want to use to uniquely identify
> this backup operation. (One good practice is to use the full path
> where you intend to put the backup dump file.) |pg_start_backup|
> creates a /backup label/ file, called backup_label, in the cluster
> directory with information about your backup.
>
> It does not matter which database within the cluster you connect
> to to issue this command. You can ignore the result returned by
> the function; but if it reports an error, deal with that before
> proceeding.
>
> 3.
>
> Perform the backup, using any convenient file-system-backup tool
> such as tar or cpio. It is neither necessary nor desirable to stop
> normal operation of the database while you do this.
>
> 4.
>
> Again connect to the database as a superuser, and issue the command
>
> SELECT pg_stop_backup();
>
> This should return successfully.
>
> 5.
>
> Once the WAL segment files used during the backup are archived as
> part of normal database activity, you are done.
>
>
> **********************************
>
> BUT I have some questions:
>
> 1. I connect to database using psql and issue command SELECT
> pg_start_backup('my_backup'); The result (in less than second) is:
>
> pg_start_backup
> -----------------
> 4/DA000020
> (1 row)
>
> Is it correct it goes that fast?
>
Yes.
> 2. Now I proceed to step 3 - perform the backup using file system
> backup. Could you assist me on this one? I should archive what?The
> '/data' folder (please note I use Windows)? Should I just compress it
> into rar file and transfer to standby server and overwrite it's '/data'
> folder?
>
Using rar on the data folder should work if you don't have tablespaces.
If you have some, add them to your data rar archive.
And instead of overwriting the data folder on the slave, wipe out your
old data folder and recreate it by restoring your rar archive.
BTW, pgAdmin backup and restore facilities use pg_dump/pg_restore. So
it's not really surprising that you get the same results :)
--
Guillaume
http://www.postgresql.fr
http://dalibo.com
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