[Zope-dev] Conflict errors on BDBMinimal storage

[Chris McDonough]

On Thu, 2004-05-13 at 05:23, Gerhard Schmidt wrote:
> Hi,
> 
> whe are running portal unter zope2.7 with one zeo server and six frontend 
> application servers. 
> 
> I have set up zeo to server two storages
> 
> <filestorage main>
>   path $INSTANCE_HOME/var/Data.fs
> </filestorage>
> 
> <minimalstorage temp>
>   envdir $INSTANCE_HOME/var/session
> </minimalstorage>
> 
> temp should provide an shared session. But when is set up the frontends 
> to use temp as /temp_folder, we see many  ZODB conflict errors. The 
> performance decreases and PosErrors appear quite often. 

BDBMininalStorage is no longer maintained and doesn't do any "conflict
resolution".  Even though you'll need to pack frequently, you might want
to try a FileStorage instead.

Regardless, using ZEO will presumably always generate more conflict
errors than using a "local" ZODB because the commit time is longer, and
thus there's a better chance that two threads will be committing at the
same time.

- C