Summary of changes
==================

v4.1
----

Author: Neil Schemenauer <nas@arctrix.com>
Date:   Tue Feb 23 14:37:28 2021 -0800

    Set zip_safe to False.
    
    If run from a zip package, cannot load the extension.


v4.0
----

Author: Neil Schemenauer <nas@arctrix.com>
Date:   Mon Jan 25 14:42:38 2021 -0800

    Update version to 4.0.

Author: Neil Schemenauer <nas@arctrix.com>
Date:   Mon Jan 25 14:50:21 2021 -0800

    Remove reference to DurusWorks.

Author: Neil Schemenauer <nas@arctrix.com>
Date:   Mon Jan 25 14:45:07 2021 -0800

    Use python3 for scripts.

Author: Neil Schemenauer <nas@arctrix.com>
Date:   Sun May 10 12:15:07 2020 -0700

    Small optimization for setting _p_* attributes.
    
    Use _setattribute() function to avoid the Persistent.__setattr__ hook.

Author: Neil Schemenauer <nas@arctrix.com>
Date:   Tue Sep 19 11:59:31 2017 -0700

    Pickler.clear_memo() can get slow.  Work-around that issue.
    
    The clear_memo() method can get very slow if the memo table
    gets large.  It is never shrunk, at least with the current
    version of the _pickle module.

Author: Neil Schemenauer <nas@arctrix.com>
Date:   Tue Aug 1 15:27:32 2017 -0700

    When finishing FileStorage commit, log file size.
    
    This matches the logging done by Shelf storage and it has proved
    useful for debugging issues.  Using the file size, you can "time
    travel" by truncating the DB file at that size and opening it.

Author: Neil Schemenauer <nas@arctrix.com>
Date:   Mon Mar 20 09:54:47 2017 -0700

    Order pack todo queue by file offset.

Author: Neil Schemenauer <nas@arctrix.com>
Date:   Fri Jun 24 17:35:01 2016 +0000

    Add support for an inherited server socket.
    
    Check the LISTEN_PID environment variable for an inherited
    socket (as passed by systemd).  Add support for Linux abstract
    namespace sockets (AF_UNIX with path beginning with @ sign).

Author: Neil Schemenauer <nas@arctrix.com>
Date:   Tue May 31 20:53:44 2016 +0000

    Revert cache shrink behavior to DurusWorks version.
    
    My backport of the old Durus code was buggy so just revert to the
    DurusWorks behavior of using 2X the current excess.  Optimal
    behavior here is really dependant on the work load so it is hard
    to come up with something general purpose.

Author: Neil Schemenauer <nas@arctrix.com>
Date:   Tue May 31 20:50:20 2016 +0000

    Improve db_to_py3k.py script.


v4.0a1
------

Author: Neil Schemenauer <nas@arctrix.com>
Date:   Tue Feb 9 20:27:13 2016 +0000

    Move scripts to 'bin' directory.

Author: Neil Schemenauer <nas@arctrix.com>
Date:   Fri Feb 7 10:16:50 2014 -0600

    Restore old behavior of determining cache shrink size.
    
    I'm not sure if the restored code is very good but using
    
        (len(all) - self.size) * 2
    
    results in the shrink often doing too much work and introducing long
    delays if you have a large cache.

Author: Neil Schemenauer <nas@arctrix.com>
Date:   Fri Feb 7 10:19:51 2014 -0600

    Define separate methods for PersistentSet.
    
    This is more friendly for subclassing rather than aliasing
    methods.

Author: Neil Schemenauer <nas@arctrix.com>
Date:   Tue Feb 9 20:02:39 2016 +0000

    Reorganize package, add README.md, version to 4.0a1

Author: Neil Schemenauer <nas@arctrix.com>
Date:   Tue Feb 9 18:42:02 2016 +0000

    Fix unit test, stale ghost access raises ReadConflictError.

Author: Neil Schemenauer <nas@arctrix.com>
Date:   Tue Feb 9 18:41:33 2016 +0000

    Python 3 fix for sqlite_storage.py, extract SQL text as bytes.

Author: Neil Schemenauer <nas@arctrix.com>
Date:   Tue Feb 9 18:40:50 2016 +0000

    Add --storage-class option to 'durus' command line tool.

Author: Neil Schemenauer <nas@arctrix.com>
Date:   Fri Feb 5 20:48:11 2016 +0000

    When packing, sort records by ascending OID.
    
    This is fairly cheap do to compared to file IO and could have some
    benefits for data locality.  At minimum, packing the file will
    result in near linear access.

Author: Neil Schemenauer <nas@arctrix.com>
Date:   Fri Oct 21 16:51:50 2011 -0600

    Add experimental sqlite storage module.

Author: Neil Schemenauer <nas@arctrix.com>
Date:   Thu Feb 4 18:06:16 2016 +0000

    Fix suble bug in FileStorage2 packer.
    
    Rewrite packer logic and fix a potential bug.  We must trace
    references of objects in 'pack_extra' and ensure they too end up in
    packed file.

Author: Neil Schemenauer <nas@arctrix.com>
Date:   Thu Feb 4 18:04:45 2016 +0000

    Add create_from_records() method.

Author: Neil Schemenauer <nas@arctrix.com>
Date:   Thu Feb 6 18:10:09 2014 -0600

    Restore DFS20 file storage format.

Author: Neil Schemenauer <nas@arctrix.com>
Date:   Sat Jun 22 19:27:37 2013 -0600

    Import changes from DurusWorks 1.2 release.

Author: MEMS Exchange <webmaster@mems-exchange.org>
Date:   Fri Aug 14 08:32:50 2009 -0600

    Import 3.9.

Author: MEMS Exchange <webmaster@mems-exchange.org>
Date:   Mon Dec 1 16:33:26 2008 -0600

    Import 3.8.

Author: MEMS Exchange <webmaster@mems-exchange.org>
Date:   Wed Apr 25 08:10:03 2007 -0600

    Import 3.7.

Author: MEMS Exchange <webmaster@mems-exchange.org>
Date:   Wed Nov 15 14:42:21 2006 -0600

    Import 3.6.

Author: MEMS Exchange <webmaster@mems-exchange.org>
Date:   Tue Aug 15 11:30:35 2006 -0600

    Import 3.5.

Author: MEMS Exchange <webmaster@mems-exchange.org>
Date:   Thu May 11 13:25:14 2006 -0600

    Import 3.4.

Author: MEMS Exchange <webmaster@mems-exchange.org>
Date:   Thu May 18 14:00:13 2006 -0600

    Import 3.4.1.

Author: MEMS Exchange <webmaster@mems-exchange.org>
Date:   Wed Mar 15 08:17:09 2006 -0600

    Import 3.3.

Author: MEMS Exchange <webmaster@mems-exchange.org>
Date:   Tue Jan 31 15:56:11 2006 -0600

    Import 3.2.

Author: MEMS Exchange <webmaster@mems-exchange.org>
Date:   Tue Oct 18 12:04:47 2005 -0600

    Import 3.1.

Author: MEMS Exchange <webmaster@mems-exchange.org>
Date:   Tue Aug 9 14:29:53 2005 -0600

    Import 3.0a.

Author: MEMS Exchange <webmaster@mems-exchange.org>
Date:   Thu Sep 8 06:47:07 2005 -0600

    Import 3.0.

Author: MEMS Exchange <webmaster@mems-exchange.org>
Date:   Tue Apr 26 13:51:50 2005 -0600

    Import 2.0.

Author: MEMS Exchange <webmaster@mems-exchange.org>
Date:   Mon Mar 7 14:00:56 2005 -0600

    Import 1.5.

Author: MEMS Exchange <webmaster@mems-exchange.org>
Date:   Thu Jan 27 18:51:17 2005 -0600

    Import 1.4.

Author: MEMS Exchange <webmaster@mems-exchange.org>
Date:   Fri Dec 10 05:59:15 2004 -0600

    Import 1.3.

Author: MEMS Exchange <webmaster@mems-exchange.org>
Date:   Wed Sep 8 15:27:04 2004 -0600

    Import 1.2.

Author: MEMS Exchange <webmaster@mems-exchange.org>
Date:   Sat Jul 31 19:48:04 2004 -0600

    Import 1.0.

Author: MEMS Exchange <webmaster@mems-exchange.org>
Date:   Fri Jul 23 14:35:16 2004 -0600

    Import 0.1.


v3.9
----

Author: Neil Schemenauer <nas@arctrix.com>
Date:   Sat Jan 15 22:46:07 2011 -0600

    Import 3.9


v3.8
----

Author: MEMS Exchange <webmaster@mems-exchange.org>
Date:   Mon Dec 1 16:33:26 2008 -0600

    Import 3.8.


v3.7
----

Author: MEMS Exchange <webmaster@mems-exchange.org>
Date:   Wed Apr 25 08:10:03 2007 -0600

    Import 3.7.


v3.6
----

Author: MEMS Exchange <webmaster@mems-exchange.org>
Date:   Wed Nov 15 14:42:21 2006 -0600

    Import 3.6.


v3.5
----

Author: MEMS Exchange <webmaster@mems-exchange.org>
Date:   Tue Aug 15 11:30:35 2006 -0600

    Import 3.5.

Author: MEMS Exchange <webmaster@mems-exchange.org>
Date:   Thu May 11 13:25:14 2006 -0600

    Import 3.4.


v3.4.1
------



v3.4
----

Author: MEMS Exchange <webmaster@mems-exchange.org>
Date:   Thu May 11 13:25:14 2006 -0600

    Import 3.4.

Author: MEMS Exchange <webmaster@mems-exchange.org>
Date:   Thu May 18 14:00:13 2006 -0600

    Import 3.4.1.


v3.3
----

Author: MEMS Exchange <webmaster@mems-exchange.org>
Date:   Wed Mar 15 08:17:09 2006 -0600

    Import 3.3.


v3.2
----

Author: MEMS Exchange <webmaster@mems-exchange.org>
Date:   Tue Jan 31 15:56:11 2006 -0600

    Import 3.2.


v3.1
----

Author: MEMS Exchange <webmaster@mems-exchange.org>
Date:   Tue Oct 18 12:04:47 2005 -0600

    Import 3.1.


v3.0a
-----

Author: MEMS Exchange <webmaster@mems-exchange.org>
Date:   Tue Aug 9 14:29:53 2005 -0600

    Import 3.0a.


v3.0
----

Author: MEMS Exchange <webmaster@mems-exchange.org>
Date:   Thu Sep 8 06:47:07 2005 -0600

    Import 3.0.


v2.0
----

Author: MEMS Exchange <webmaster@mems-exchange.org>
Date:   Tue Apr 26 13:51:50 2005 -0600

    Import 2.0.


v1.5
----

Author: MEMS Exchange <webmaster@mems-exchange.org>
Date:   Mon Mar 7 14:00:56 2005 -0600

    Import 1.5.


v1.4
----

Author: MEMS Exchange <webmaster@mems-exchange.org>
Date:   Thu Jan 27 18:51:17 2005 -0600

    Import 1.4.


v1.3
----

Author: MEMS Exchange <webmaster@mems-exchange.org>
Date:   Fri Dec 10 05:59:15 2004 -0600

    Import 1.3.


v1.2
----

Author: MEMS Exchange <webmaster@mems-exchange.org>
Date:   Wed Sep 8 15:27:04 2004 -0600

    Import 1.2.


v1.0
----

Author: MEMS Exchange <webmaster@mems-exchange.org>
Date:   Sat Jul 31 19:48:04 2004 -0600

    Import 1.0.


v0.1
----

Author: MEMS Exchange <webmaster@mems-exchange.org>
Date:   Fri Jul 23 14:35:16 2004 -0600

    Import 0.1.

