On Nov 25, 2007, at 10:46 AM, Pablo Alcaraz wrote:
Hi all,
I read that pg_dump can run while the database is being used and makes
"consistent backups".
I have a huge and *heavy* selected, inserted and updated database.
Currently I have a cron task that disconnect the database users,
make a
backup using pg_dump and put the database online again. The problem
is,
now there are too much information and everyday the database store
more
and more data, the backup process needs more and more time to run
and I
am thinking about to do the backup using a process that let me to
do it
with the minimal interruptions for the users.
I do not need a last second backup. I could the a backup with "almost
all" the data but I need the information on it to be coherent. For
example, if the backup store information about an invoice it *must* to
store both header and items invoice information. I could live if the
backup does not store some invoices information when is ran, because
they ll be backuped the next time the backup process run. But I can
not
store only a part of the invoices. That is I call a coherent backup.
The best for me is that the cron tab does a concurrent backup with all
the information until the time it starts to run while the clients are
using the database. Example: if the cron launch the backup process at
12:30 AM, the backup moust be builded with all the information *until*
12:30AM. So if I need to restore it I get a database coherent with the
same information like it was at 12:30AM. it does not matter if the
process needs 4 hours to run.
Does the pg_dump create this kind of "consistent backups"? Or do I
need
to do the backups using another program?
Yes, that is exactly what pg_dump does.
Erik Jones
Software Developer | Emma®
erik@xxxxxxxxxx
800.595.4401 or 615.292.5888
615.292.0777 (fax)
Emma helps organizations everywhere communicate & market in style.
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