Dieter Maurer wrote: > Shane Hathaway wrote at 2008-1-31 00:12 -0700: >> ... >> 1. Download ZODB and patch it with poll-invalidation-1-zodb-3-8-0.patch > > What does "poll invalidation" mean? > > The RelStorage maintains a sequence of (object) invalidations ordered > by "transaction-id" and the client can ask "give me all invalidations > above this given transaction id"? It does so at the start of each > transaction? > > In this case, how does the storage know when it can forget > invalidations?
That's not quite right--RelStorage does not maintain any per-client notification list. Instead, each client asks whether any transactions have committed since the last poll. The transaction ID of the last poll is tracked by the storage instance bound to the connection. If any transactions have committed, then the client gets a list of OIDs changed by those transactions and invalidates the corresponding objects. Shane _______________________________________________ For more information about ZODB, see the ZODB Wiki: http://www.zope.org/Wikis/ZODB/ ZODB-Dev mailing list - ZODB-Dev@zope.org http://mail.zope.org/mailman/listinfo/zodb-dev
