=== Pre-2010 ===
Tickets [[http://code.djangoproject.com/ticket/12427|#12427]] and [[http://code.djangoproject.com/ticket/11675|#11675]] are opened with different by related goals: get rid of cmemcache (which had gone the way of the broken-as-heck dodo) and add support for a new libmemcached wrapper pylibmc (respectively). 


=== Feb 2010 ===
Email thread seen here begins: http://groups.google.com/group/django-developers/browse_thread/thread/4eb685ca5b305f18/


=== March 2010 ===
Ticket is put in for 1.2 to put use of cmemcache as FuturePendingDeprecation, while adding support for pylibmc was greenlit for 1.3

=== October 2010 ===
Discussion re-started with three key points to debate:


 * Pylibmc 1.1 doesn't play that nice with mod_wsgi due to it's use of the Simplified GIL API (see: http://www.dctrwatson.com/2010/09/beware-of-using-pylibmc-1-1-and-mod_wsgi/). Probably just need to make note of it in the documentation, but it's worth noting.
 * The suggested use of using query-string for client-specific options and libmemcached 'behaviors' eventually leading to massive client strings, and the use of a CACHE_SETTINGS dictionary may be a better solution.
 * Because it bypasses the GIL, pylibmc isn't thread safe. There are a few different solutions, the most apparent being to use pylibmc's ThreadMappedPool. More info here: http://lericson.blogg.se/code/2009/september/draft-sept-20-2009.html and http://blog.sendapatch.se/2009/september/pooling-with-pylibmc-pt-2.html . 

Another post of note with regards to multithreading [ala, celery] here: http://www.dctrwatson.com/2010/09/python-thread-safe-does-not-mean-fork-safe/#more-48

=== November 2010 ===

11/29: Draft one suggested to the django-dev lift
Draft #1: https://gist.github.com/91de59e53f7f36f461ec

Caveats/Notes on the draft: 
A) This is only the memcache.py file, changes to conf/global_settings and core/cache/base will be needed to handle the move towards CACHE_SETTINGS 

B) pylibmc and memcached handle negative timeouts differently. The expected behavior as laid out in template tests is how python-memcached handles it (instant expiration). I had to do a fairly sad looking hack to make pylibmc work, and is noted in a comment.

C) The current version of pylibmc doesn't play nice with python sub-interuptors, and thus, mod_wsgi. There is a commit (https://github.com/lericson/pylibmc/commit/ddd2f011f73d8ccc6347c5471eff378bef58dbd5) in trunk that fixes this, but a release has not been given out. We may want to be extra-communicative of this and the possible workarounds.