[ZODB-Dev] ZODB blob mini-sprint
chrism at plope.com
Wed Jun 15 01:41:11 EDT 2005
A bit of status on the progress of blobs... we need do some a small bit
of cleanup and create a few more tests, but that said, I think we'd be
pretty much ready to do a merge to the ZODB HEAD at once we take action
on these outstanding issues:
- I'd like to allow for a "read only" blob cache directory, so folks
can mount the "canonical" directory containing blobs from the ZEO
server onto the ZEO clients. I think this feature could be
totally optional, so if no one has any indignity over the idea itself,
I can just add it.
- We need to deal sanely with missing data in blob directories in
a number of places. "Sane" means not causing a ZODB PANIC exception
when attempting to load nonexistent data files (they may have been
deleted or moved by a user for whatever reason).
- Figure out how to clean out "non-read-only" ClientStorage blob cache
every so often. Right now it just grows without bound.
- Think hard about what it means to fail in the middle of the
last phase of a transaction involving blobs. What should the
BlobStorage do when it starts up next? How do we detect
that the transaction was half-committed? I hope Toby's last
message didn't imply that our current implementation is
- Simple: we need to log loudly when files are "renamed"
across partitions and we need to test BlobStorage.getSize.
- Test on Windows.
Christian may think of some other issues. In particular, something
about importing "backwards compatible" ZEXP files (sorry Christian, I
didn't understand that...)
Once we work this stuff out, should I just merge into the svn HEAD or is
there further svn ceremony that should happen?
On Sat, 2005-06-11 at 12:14 +0200, Christian Theune wrote:
> I'm awake now and waiting for the U.S. citizens (especially chrism) that
> are interested in the ZODB blob stuff to get up later and come to IRC on
> #zodb-dev to discuss the tasks on hand, especially test cases to
> For more information about ZODB, see the ZODB Wiki:
> ZODB-Dev mailing list - ZODB-Dev at zope.org
More information about the ZODB-Dev