RE: [Zope-dev] Cache growing during single REQUEST

Tim Peters wrote at 2003-9-11 23:50 -0400:

... You can google on the phrase to get a ton of more-or-less abstract overviews of the concept. The short course in ZODB is that, when MVCC is in effect, a read will return the state of the object as of the time the current transaction began, even if the object has subsequently been modified by some other transaction.

Whoever wants to use it right now: the "no more ReadConflictErrors" patch on <http://www.dieter.handshake.de/pyprojects/zope> does precisely this (for storages that support history information). Dieter