Hello, I have a simple use case in a Zope site:
We had to manage massive object creation, so we set up Btrees. Users are creating a lot of objects in a single Btree. They are never working on the same object, just adding new objects. This leads to conflict errors when the pace of creation is high. It happens for instance in a website where 200 users work all day long on the website, and are creating objects in the btree. I have created a Python script to try to reproduce this problem with ZODB 3.7. Basically, it tries to reproduce the adding of objects by users, with sleeps to reproduce a realistic transaction when these objects are added through a Zope app. It's here: http://paste.plone.org/19308 The stress values I have set are generating Conflict errors on my MacBook. I have then tried the very same script, using RelStorage, because I thaught it would be better, but I have the same non resolved conflicts. Since BTrees are written in C, I couldn't add my own conflict manager to try to merge buckets. (and this is way over my head) Is there a way to avoid these conflicts in BTree ? ++ Tarek -- View this message in context: http://www.nabble.com/How-to-avoid-ConflictErrors-in-BTrees---tp15224628p15224628.html Sent from the Zope - ZODB-Dev mailing list archive at Nabble.com. _______________________________________________ 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
