Re: Problem with Online-Backup

>>> Nowadays I also wonder about the restoration times of say 200GB or even
>>> TBs of data from backups. More fun if there are Very Important and
>>> Influential People popping in every 15 minutes to ask whether it's done
>>> yet.
>
> That's a problem with pg.  pg_dump is single-threaded and can only
> write out to one file/device.
>
> Now that PITR-from-WAL is in place, there are people who swear that
> tarring up data directories, and then WAL-log rolling them forward
> works perfectly.  If your database uses tablespaces and is spread

Perfectly? Hardly ;) but it does indeed work.

Joshua D. Drake

> across multiple disk devices, then you could probably speed the
> backup/restore by parallel tarring each device data tree to it's own
>  tape drive.  6 LTO tape drives and your TB database gets backed up
> up right quickly.
>
>

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TIP 9: In versions below 8.0, the planner will ignore your desire to
       choose an index scan if your joining column's datatypes do not
       match



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