[ZODB-Dev] URGENT: ZODB down - Important Software Application at CERN

[Laurence Rowe]

Pedro Ferreira wrote:
> Dear all,
> 
> Thanks a lot for your help. In fact, it was a matter of increasing the
> maximum recursion limit.
> There's still an unsolved issue, though. Each time we try to recover a
> backup using repozo, we get a CRC error. Is this normal? Has it happened
> to anyone?
> 
> I guess we have a very large database, for what is normal in ZODB
> applications. We were wondering if there's any way to optimize the size
> (and performance) of such a large database, through the removal of
> unused objects and useless data. We perform packs in a weekly basis, but
> we're not sure if this is enough, or if there are other ways of
> lightening up the DB. Any recommendations regarding this point?

You might want to try packing without garbage collection, which is a 
much cheaper operation. See 
http://mail.zope.org/pipermail/zodb-dev/2009-January/012365.html

Laurence