Re: [ZODB-Dev] Re: ZODB Benchmarks
Roché Compaan wrote at 2008-2-4 20:54 +0200: > ... >I don't follow? There are 2 insertions and there are 1338046 calls >to persistent_id. Doesn't this suggest that there are 66 objects >persisted per insertion? This seems way to high? Jim told you that "persistent_id" is called for each object and not only persistent objects. An OOBucket contains up to 30 key value pairs, each of which are subjected to a call to "persistent_id". In each of your pairs, there is an additional persistent object. This means, you should expect 3 calls to "persistent_id" for each pair in an "OOBucket". -- Dieter ___ 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
Re: [ZODB-Dev] RelStorage now in Subversion
Hello Shane, Shane Hathaway wrote at 2008-2-3 23:57 -0700: > ... >Looking into this more, I believe I found the semantic we need in the >PostgreSQL reference for the LOCK statement [1]. It says this about >obtaining a share lock in read committed mode: "once you obtain the >lock, there are no uncommitted writes outstanding". My understanding of >that statement and the rest of the paragraph suggests the following >guarantee: in read committed mode, once a reader obtains a share lock on >a table, it sees the effect of all previous transactions on that table. I have been too pessimitic with respect to Postgres. While Postgres uses the freedom of the ASNI isolation level definitions (they say that some things must not happen but do not prescribe that other things must necessarily happen), Postgres has a precise specification for the "read committed" mode -- it says: in read committed mode, each query sees the state as it has been when the query started. This implies that it sees all transactions that have been committed before the query started. This is sufficient for your conflict resolution to be correct -- as you hold the commit lock during conflict resolution such that no new transaction can happen during the query in question. -- Dieter ___ 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
Re: [ZODB-Dev] zodb tools for zodb as of zope 2.9.6?
I suspect that any recent ZODB release would do. I assume that Zope 2.9 shipped with ZODB 3.6. Starting with ZODB 3.7, if you install ZODB with setuptools (e.g. easy_install or buildout) then these scripts will be installed in the destination bin directory. Jim On Feb 4, 2008, at 7:57 PM, Chris Withers wrote: Hi All, Where can I find the zodb tools (fsrefs.py, fstest.py, etc) as appropriate for the zodb that ships with Zope 2.9.6? iirc, 2.9.6 was one of the releases that didn't ship with ZODBTools due to a bug, so I'm looking for places to hunt! cheers, Chris -- Simplistix - Content Management, Zope & Python Consulting - http://www.simplistix.co.uk ___ 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 -- Jim Fulton Zope Corporation ___ 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
Re: [ZODB-Dev] zodb tools for zodb as of zope 2.9.6?
On Feb 5, 2008, at 01:57 , Chris Withers wrote: Hi All, Where can I find the zodb tools (fsrefs.py, fstest.py, etc) as appropriate for the zodb that ships with Zope 2.9.6? iirc, 2.9.6 was one of the releases that didn't ship with ZODBTools due to a bug, so I'm looking for places to hunt! A tarball install (not from svn) that I have here has all those tools. They are in /utilities/ZODBTools/. The issue that existed once was that the installer did not copy those scripts to a different place, I think it was /bin/. The scripts were shipped correctly with the source. Would have taken you less time to use "find" than to write that email... jens ___ 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
