Re: 2.5TB Migration from SATA to SSD disks - PostgreSQL 9.2

>
>
> So is that really possible? Just copy the data between folders? if so,
> i'll probably chose option 2!!!
> Even that is 2.5TB I don't think the copy will take longer than 20
> minutes... and I'd still be able to perform reads...
>
> I'll do some test to see if option 2 can be done :)
>
> Thanks !!! :D
>
>

You can actually reduce the time more by pre-syncing to the new location.
something like:

rsync -va /var/lib/pgsql/ /var/lib/pgsql2/
service postgres stop
rsync -va /var/lib/pgsql/ /var/lib/pgsql2/

The second rsync will only copy the deltas from the first, it still has to
go in and determine what needs to be copied/what changed but the bulk of it
can be prepared/migrated before the actual downtime window.