Toru SHIMOGAKI wrote:
> Joshua D. Drake wrote:
>
>>> - If we don't use hardware level snapshot operation, it takes long time to take
>>> a large backup data, and a lot of full-page-written WAL files are made.
>> Does it? I have done it with fairly large databases without issue.
>
> You mean hardware snapshot?
Oh goodness no. :)
> I know taking a backup using rsync(or tar, cp?) as a
> n online backup method is not so a big problem as documented. But it just take a
I use rsync with pg_start/stop_backup and it works very well. Even on
databases that are TB in size.
> long time if we handle a terabyte database. We have to VACUUM and other batch
> processes to the large database as well, so we don't want to take a long time
> to take a backup...
Ahh o.k. that makes sense. The difference here is probably how often we
take the snapshot. We take them very often to insure we don't have a ton
of logs we have to pull over.
Joshua D. Drake
>
> Regards,
>
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