[Zope3-Users] Repozo and events

[David Pratt]

Hi. I am interested in maintaining the zope object database in a way 
that I can have it back up quickly and without loss if needed (locating 
the backup files to another machine for restoration if needed in a 
failure situation).

I realize the normal way to use repozo is using cron to create 
incremental files and merge them to reassemble the zodb. I also use 
pgstorage. Postgres's write ahead logs can currently be used to 
reassemble a relational database to the point in time of failure without 
any loss of transactions.

In the repozo case, transactions can still be lost depending on the time 
interval set in cron. Would using object events in zope be a better way 
to have repozo keep pace with each transaction in zodb so that there is 
no loss. A time method could then be used to merge the small files over 
a regular interval into a larger file so rebuilding the db would not 
involve so many files. I was thinking something like this could be put 
in a package for automated backup of zodb. Not to replace Repozo as a 
command line utility, just as a help for backup. Perhaps there are 
better ideas. Many thanks.

Regards,
David