On 03/24/2014 11:46 PM, CS_DBA wrote: > Hi All; > > If I shutdown a HOT standby slave (via the -m fast command) can I then > copy the data directory to a "backup" location and be guaranteed that > the backup copy will start?
Yes, but you must also backup the WAL archive from which you are recovering (in case you are using file based log shipping and not streaming replication). For streaming replication I don't know if it works.
> > For some reason I thought there were issues (or potential issues) with > this method and a PITR based recovery approach was a better guarantee > that the copy will start > > > Thoughts? >
Info about other options appreciated. > >
Best, Juergen -- | Jürgen Fuchsberger, M.Sc. | Wegener Center for Climate and Global Change | University of Graz
If you pause the recovery ( pg_xlog_pause ) , the process try to take a spin lock , and then pause the recovery , so it's consistent, at that point if you close the database, the consistent is reached, so I think you have no problem to have a "snapshoot" of the database.
Obviously you need also the archived checkpoint segments if you need to make a PITR.