This means that every Update/Insert command make sthe ZODB grow, right? Has anyone had experience with Packing a site with high traffic in a case like this (RDBMS backend)? What happens?
On Wednesday 24 April 2002 12:55 pm, Leonardo Rochael Almeida wrote: > On Tue, 2002-04-23 at 21:36, Jason Spisak wrote: > > [...] > > > > 5. The transactional nature of Zope (although they didn't > > believe me when it came to rolling back multiple dbs) > > impressed them and if it really can mange a rollback from > > from a DB and transaction safety for inventory,etc...(which > > I know it can) then its a huge win. > > Yes, of course it can, IF you use a properly trascationed DB > and adapter. Psycopg fits the bill nicely, as do DCOracle2. > > As for multiple DB rollback, yes, that works as advertised, > and is actually really easy to believe if you explain them > how it works. Truth is, Two-Phase-Commit was INVENTED (a long > time ago, and not in Zope) to make it possible to commit or > rollback multiple transactional entities at the same time. > Zope is just an implementation of a TPC coordinator (I think, > and I hope I got the vocabulary right). > > In the course of a Zope transaction, any object that is > invoked and wants to be notified of the tpc phases registers > itself in the transaction machinery. Most of them inherit > from Shared.DC.ZRDB.TM.TM. When a transaction is aborted or > commited, the Transaction machinery notifies all registered > objects. Each registered object then calls the respective > actions in their backend drivers or whatever. > > Cheers, Leo -- Jason Spisak Marketing Director, Lycoris [EMAIL PROTECTED], http://www.lycoris.com Desktop/LX: Familiar. Powerful. Open. _______________________________________________ Zope-Dev maillist - [EMAIL PROTECTED] http://lists.zope.org/mailman/listinfo/zope-dev ** No cross posts or HTML encoding! ** (Related lists - http://lists.zope.org/mailman/listinfo/zope-announce http://lists.zope.org/mailman/listinfo/zope )