[Zope-dev] BTrees and ConflictErrors.

[Chris McDonough]

I didn't test the conflict resolution code with ClientStorage.  You may
want to try the same test without ZEO temporarily if you've got the
time...

Anthony Baxter wrote:
> 
> >>> Chris McDonough wrote
> > Is this all via ZEO?
> 
> Yep. ZEO all the way.
> 
> Anthony
> 
> > Anthony Baxter wrote:
> > >
> > > >>> Anthony Baxter wrote
> > > > I thought the newer BTrees code was meant to deal with conflicts from
> > > > two entries being added at the same time?
> > > > I'm using CoreSessionTracking 0.8 with an external data source on a
> > > > bsddb3Storage.Minimal storage mounted via ZEO (using the current Zope2.3
> > > > code). If two sessions are created around the same time, I'm seeing
> > > > ConflictErrors - there doesn't seem to be any attempt to invoke the
> > > > resolveConflict code.
> > >
> > > Ok, things that I've found:
> > >
> > > Minimal doesn't even try to implement Conflict resolution - I've switched t
> o
> > > 'Full'. To no real avail, unfortunately - it's still breaking when I hammer
> > > it (10 clients all creating one new session per second).
> > >
> > > I've tried putting the SessionData object in a normal Data.fs - still no
> > > joy. I've also tried using CST's internal data container (RAM based).
> > > The ConflictErrors keep on flying.
> > >
> > > About the only thing I haven't tried yet is to try Zope2.4 - this is
> > > something of a pain, though.
> > >
> > > Has anyone got any other ideas? Am I just completely out of luck here?
> > > Do people have other suggestions for containers that can take a large
> > > number of new object create/deletes?
> > >
> > > Thanks,
> > > Anthony
> > >
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> >
> > --
> > Chris McDonough                           Zope Corporation
> > http://www.zope.org                    http://www.zope.com
> >
> > """ Killing hundreds of birds with thousands of stones """
> >
> 
> --
> Anthony Baxter     <anthony@interlink.com.au>
> It's never too late to have a happy childhood.
> 
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-- 
Chris McDonough                    Zope Corporation
http://www.zope.org             http://www.zope.com
"Killing hundreds of birds with thousands of stones"