Re: PITR, checkpoint, and local relations

"J. R. Nield" <jrnield@usol.com> writes:
>> (In particular, I *strongly* object to using the buffer manager at all
>> for reading files for backup.  That's pretty much guaranteed to blow out
>> buffer cache.  Use plain OS-level file reads.  An OS directory search
>> will do fine for finding what you need to read, too.)

> How do you get atomic block copies otherwise?

Eh?  The kernel does that for you, as long as you're reading the
same-size blocks that the backends are writing, no?
        regards, tom lane