between logs and ints.

  entry, the cache could be left in a stage when there is data marked
  current that should be invalidated, leading to persistent conflict
  errors.

- Invalidations of object records in ZEO caches, where the
  invalidation transaction ids matched the cached transaction ids
  should have been ignored.

- Corrupted or invalid cache files prevented ZEO clients from
  starting. Now, bad cache files are moved aside.

Cache simulation, while not perfect, seems to be much more accurate
now than it was before.

The ZEO cache trace statistics and simulation scripts have been
given more descriptive names and moved to the ZEO scripts package.

than before).  It's possible that process shutdown after updating
lastTid but before invalidating the current record could explain some
problems we've seen on restarts. (I can't think of a sane way to test
this scenario.)

platforms led to undetected overflow errors. Now these cases cause
Overflow errors to be raised.

https://bugs.launchpad.net/zodb/+bug/143237

Updating blobs in save points could cause spurious "invalidations
out of order" errors.  https://bugs.launchpad.net/zodb/+bug/509801

(Thanks to Christian Zagrodnick for chasing this down.)

2.7. :(

created temporarily (not passed to the constructor).

in. When no changes are passed to the constructor, then they are
closed when the storage is closed.

Changed the behavior for closing changes when changes weren't passed
in. When no changes are passed to the constructor, then they are
closed when the storage is closed.

Fixed a test that wasn't testing what it though it was (or anything really).

This required using manuel to get the footnote
feature. Unfortunately, manuel imports zope.testing.doctest. :)
Hpefully, this will be fixed soon.

Updated the testhistoricalconnections.py tearDown to clear conflict
resolution class cache. The cache was causing tests to fail when tests
were run multiple times.

(Also use standard doctest.)

  Applications for this include compression and encryption.  An
  example wrapper storage implementation, ZODB.tests.hexstorage, was
  included for testing.

It is important that storage implementations not assume that
  storages contain pickles.  Renamed IStorageDB to IStorageWrapper and
  expanded it to provide methods for transforming and untransforming
  data records.  Storages implementations should use these methods to
  get pickle data from stored records.

- Deprecated ZODB.interfaces.StorageStopIteration.  Storage
  iterator implementations should just raise StopIteration, which
  means they can now be implemented as generators.

thought this support already existed, but found out I was wrong when I
tried to make it work. :/) Applications for this include compression
and encryption.  An example wrapper storage implementation,
ZODB.tests.hexstorage, was included for testing.

It is important that storage implementations not assume that
storages contain pickles.  Renamed IStorageDB to IStorageWrapper and
expanded it to provide methods for transforming and untransforming
data records.  Storages implementations should use these methods to
get pickle data from stored records.

can fail if the pickle has been transformed and a calling storage
doesn't account for that.  Printing is certainly not the right way to
deal with the problem.

Also cleaned up some whitespace.

iterator implementations should just raise StopIteration, which
means they can now be implemented as generators.

  The filestorage packer configuration option noe accepts calues of
  the form ``modname:expression``, allowing the use of packer
  factories with options.

  The file-storage backup script, repoze, will now create a backup
  index file if an output file name is given via the --output/-o
  option.

(Merged the tseaver-repozo_index branch.)

sucking up a lot of time, as shown in some profile output.