george donnelly wrote:
I feel like tying a user to a one instance partially defeats the purpose of a cluster i guess. if that instance goes down the user is inconvenienced.
George, We do a similar thing this our ZEO clusters. Instead of MappingStorage we use TemporaryStorage. The revelent bits from our configs: zeo.conf: %import DirectoryStorage # Main DirectoryStorage database <directorystorage main> path $INSTANCE/var/zodb read-only off </directorystorage> %import tempstorage <temporarystorage temp> name temporary storage for sessioning </temporarystorage> zope.conf: <zodb_db main> mount-point / <zeoclient> server 9999 storage main name zeostorage cache-size 1000000000 client client1 var $INSTANCE/var </zeoclient> </zodb_db> <zodb_db temporary> <zeoclient> server 9999 storage temp name zeostorage var $INSTANCE/var </zeoclient> mount-point /temp_folder container-class Products.TemporaryFolder.TemporaryContainer </zodb_db> *Note* This will not work out of the box in 2.7.0, as there is a method missing from TemporaryStorage.py. I think it is fixed in CVS, if not add the following method. def lastTransaction(self): """Return transaction id for last committed transaction""" return self._ltid -Matt -- Matt Hamilton matth@netsight.co.uk Netsight Internet Solutions, Ltd. Business Vision on the Internet http://www.netsight.co.uk +44 (0)117 9090901 Web Design | Zope/Plone Development & Consulting | Co-location | Hosting