Re: [Django] #11675: [patch] Support new memcached wrapper pylibmc

[Django]

#11675: [patch] Support new memcached wrapper pylibmc
--+-
  Reporter:  pipp...@yahoo.co.jp  | Owner:  otherjacob  
  
Status:  assigned | Milestone:  1.3 
  
 Component:  Cache system |   Version:  SVN 
  
Resolution:   |  Keywords:  cache pylibmc 
memcached.py
 Stage:  Accepted | Has_patch:  0   
  
Needs_docs:  0|   Needs_tests:  0   
  
Needs_better_patch:  0|  
--+-
Changes (by nmk):

 * cc: niki...@gmail.com (added)

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Re: [Django] #11675: [patch] Support new memcached wrapper pylibmc

[Django]

#11675: [patch] Support new memcached wrapper pylibmc
--+-
  Reporter:  pipp...@yahoo.co.jp  | Owner:  otherjacob  
  
Status:  assigned | Milestone:  1.3 
  
 Component:  Cache system |   Version:  SVN 
  
Resolution:   |  Keywords:  cache pylibmc 
memcached.py
 Stage:  Accepted | Has_patch:  0   
  
Needs_docs:  0|   Needs_tests:  0   
  
Needs_better_patch:  0|  
--+-
Comment (by nmk):

 1.1.1 not work with mod_wsgi (fixed in
 
[https://github.com/lericson/pylibmc/commit/ddd2f011f73d8ccc6347c5471eff378bef58dbd5])

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Re: [Django] #11675: [patch] Support new memcached wrapper pylibmc

[Django]

#11675: [patch] Support new memcached wrapper pylibmc
--+-
  Reporter:  pipp...@yahoo.co.jp  | Owner:  otherjacob  
  
Status:  assigned | Milestone:  1.3 
  
 Component:  Cache system |   Version:  SVN 
  
Resolution:   |  Keywords:  cache pylibmc 
memcached.py
 Stage:  Accepted | Has_patch:  0   
  
Needs_docs:  0|   Needs_tests:  0   
  
Needs_better_patch:  0|  
--+-
Changes (by elus):

 * cc: tomasz.ele...@gmail.com (added)

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Re: [Django] #11675: [patch] Support new memcached wrapper pylibmc

[Django]

#11675: [patch] Support new memcached wrapper pylibmc
--+-
  Reporter:  pipp...@yahoo.co.jp  | Owner:  otherjacob  
  
Status:  assigned | Milestone:  1.3 
  
 Component:  Cache system |   Version:  SVN 
  
Resolution:   |  Keywords:  cache pylibmc 
memcached.py
 Stage:  Accepted | Has_patch:  0   
  
Needs_docs:  0|   Needs_tests:  0   
  
Needs_better_patch:  0|  
--+-
Changes (by anonymous):

  * milestone:  2.0 => 1.3

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Re: [Django] #11675: [patch] Support new memcached wrapper pylibmc

[Django]

#11675: [patch] Support new memcached wrapper pylibmc
--+-
  Reporter:  pipp...@yahoo.co.jp  | Owner:  otherjacob  
  
Status:  assigned | Milestone:  2.0 
  
 Component:  Cache system |   Version:  SVN 
  
Resolution:   |  Keywords:  cache pylibmc 
memcached.py
 Stage:  Accepted | Has_patch:  0   
  
Needs_docs:  0|   Needs_tests:  0   
  
Needs_better_patch:  0|  
--+-
Changes (by anonymous):

 * cc: dan...@rulez.sk (added)
  * milestone:  1.3 => 2.0

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Re: [Django] #11675: [patch] Support new memcached wrapper pylibmc

[Django]

#11675: [patch] Support new memcached wrapper pylibmc
--+-
  Reporter:  pipp...@yahoo.co.jp  | Owner:  otherjacob  
  
Status:  assigned | Milestone:  1.3 
  
 Component:  Cache system |   Version:  SVN 
  
Resolution:   |  Keywords:  cache pylibmc 
memcached.py
 Stage:  Accepted | Has_patch:  0   
  
Needs_docs:  0|   Needs_tests:  0   
  
Needs_better_patch:  0|  
--+-
Comment (by gabrielhurley):

 Replying to [comment:12 mmalone]:
 > pylibmc raises pylibmc.NotFound if you incr/decr a key that doesn't
 exist while the other Python clients raise ValueError. I'm pretty sure
 this will break the Django memcache backend for incr/decr operations.

 If necessary, it should be easy enough to catch that and then re-raise a
 ValueError to be consistent. Django certainly does that to maintain
 consistency in other places (such as for errors raised by different db
 backends).

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Re: [Django] #11675: [patch] Support new memcached wrapper pylibmc

[Django]

#11675: [patch] Support new memcached wrapper pylibmc
--+-
  Reporter:  pipp...@yahoo.co.jp  | Owner:  otherjacob  
  
Status:  assigned | Milestone:  1.3 
  
 Component:  Cache system |   Version:  SVN 
  
Resolution:   |  Keywords:  cache pylibmc 
memcached.py
 Stage:  Accepted | Has_patch:  0   
  
Needs_docs:  0|   Needs_tests:  0   
  
Needs_better_patch:  0|  
--+-
Comment (by mmalone):

 Hey guys, just a quick comment from my experiences switching to pylibmc on
 a (non-django) project I'm working on. The transition was pretty smooth,
 the only thing I noticed that was slightly different in terms of
 implementation is that pylibmc raises pylibmc.NotFound if you incr/decr a
 key that doesn't exist while the other Python clients raise ValueError.
 I'm pretty sure this will break the Django memcache backend for incr/decr
 operations.

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Re: [Django] #11675: [patch] Support new memcached wrapper pylibmc

[Django]

#11675: [patch] Support new memcached wrapper pylibmc
--+-
  Reporter:  pipp...@yahoo.co.jp  | Owner:  otherjacob  
  
Status:  assigned | Milestone:  1.3 
  
 Component:  Cache system |   Version:  SVN 
  
Resolution:   |  Keywords:  cache pylibmc 
memcached.py
 Stage:  Accepted | Has_patch:  0   
  
Needs_docs:  0|   Needs_tests:  0   
  
Needs_better_patch:  0|  
--+-
Comment (by jbergstroem):

 Will the pylibmc (well, libmemcached) behaviors be exposed? These are very
 powerful and a game changer in many cases. To mention some of their
 benefits:
  * consistent hashing
  * switch hash algo to remain compatible with other applications/libraries
  * tweak tcp such as nodelay for a much welcome speed increase

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Re: [Django] #11675: [patch] Support new memcached wrapper pylibmc

[Django]

#11675: [patch] Support new memcached wrapper pylibmc
--+-
  Reporter:  pipp...@yahoo.co.jp  | Owner:  otherjacob  
  
Status:  assigned | Milestone:  1.3 
  
 Component:  Cache system |   Version:  SVN 
  
Resolution:   |  Keywords:  cache pylibmc 
memcached.py
 Stage:  Accepted | Has_patch:  0   
  
Needs_docs:  0|   Needs_tests:  0   
  
Needs_better_patch:  0|  
--+-
Comment (by mrts):

 Those who need `pylibmc` support right now can have a look at
 http://gist.github.com/334682.

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Re: [Django] #11675: [patch] Support new memcached wrapper pylibmc

[Django]

#11675: [patch] Support new memcached wrapper pylibmc
--+-
  Reporter:  pipp...@yahoo.co.jp  | Owner:  otherjacob  
  
Status:  assigned | Milestone:  1.3 
  
 Component:  Cache system |   Version:  SVN 
  
Resolution:   |  Keywords:  cache pylibmc 
memcached.py
 Stage:  Accepted | Has_patch:  0   
  
Needs_docs:  0|   Needs_tests:  0   
  
Needs_better_patch:  0|  
--+-
Changes (by russellm):

  * milestone:  1.2 => 1.3

Comment:

 Deferring this ticket to 1.3; #12427 is tracking the deprecation of
 cmemcache.

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Re: [Django] #11675: [patch] Support new memcached wrapper pylibmc

[Django]

#11675: [patch] Support new memcached wrapper pylibmc
--+-
  Reporter:  pipp...@yahoo.co.jp  | Owner:  otherjacob  
  
Status:  assigned | Milestone:  1.2 
  
 Component:  Cache system |   Version:  SVN 
  
Resolution:   |  Keywords:  cache pylibmc 
memcached.py
 Stage:  Accepted | Has_patch:  0   
  
Needs_docs:  0|   Needs_tests:  0   
  
Needs_better_patch:  0|  
--+-
Changes (by russellm):

  * stage:  Design decision needed => Accepted
  * milestone:  => 1.2

Comment:

 Putting back to 1.2; there has been some discussion about including a
 partial fix in 1.2 that would start the deprecation process for cmemcache.
 That won't close this ticket, but it should be addressed before 1.2 final.

 To that end, the mailing list discussion also resolved the design
 decision: we're going to add a new backend for pylibmc.

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Re: [Django] #11675: [patch] Support new memcached wrapper pylibmc

[Django]

#11675: [patch] Support new memcached wrapper pylibmc
-+--
  Reporter:  pipp...@yahoo.co.jp | Owner:  otherjacob   
 
Status:  assigned| Milestone:   
 
 Component:  Cache system|   Version:  SVN  
 
Resolution:  |  Keywords:  cache pylibmc 
memcached.py
 Stage:  Design decision needed  | Has_patch:  0
 
Needs_docs:  0   |   Needs_tests:  0
 
Needs_better_patch:  0   |  
-+--
Changes (by apollo13):

  * milestone:  1.2 =>

Comment:

 1.2 is in bug fix mode, removing the milestone…

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Re: [Django] #11675: [patch] Support new memcached wrapper pylibmc

[Django]

#11675: [patch] Support new memcached wrapper pylibmc
-+--
  Reporter:  pipp...@yahoo.co.jp | Owner:  otherjacob   
 
Status:  assigned| Milestone:  1.2  
 
 Component:  Cache system|   Version:  SVN  
 
Resolution:  |  Keywords:  cache pylibmc 
memcached.py
 Stage:  Design decision needed  | Has_patch:  0
 
Needs_docs:  0   |   Needs_tests:  0
 
Needs_better_patch:  0   |  
-+--
Changes (by russellm):

  * stage:  Accepted => Design decision needed

Comment:

 Erm... there's a test, but no actual fix?

 Also - I'm not completely sold on either approach. Specifying a module
 name in the CACHE_BACKEND setting is a neat idea - provided there is some
 sort of guarantee that the API for a python memcache backend is always the
 same. From first inspection, this isn't true (set_many vs set_multi).
 Subclassing seems like overkill, given that there is a limited number of
 support classes out there.

 Another option that hasn't been floated is to allow pylibmc:// definitions
 that point to a cache.memcache.PyLibMemcache implementation; that is, we
 do the subclassing, so end users don't have to.

 Also - given that cmemcache is clearly deprecated, so we should also
 deprecate it's use.

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Re: [Django] #11675: [patch] Support new memcached wrapper pylibmc

[Django]

#11675: [patch] Support new memcached wrapper pylibmc
--+-
  Reporter:  pipp...@yahoo.co.jp  | Owner:  otherjacob  
  
Status:  assigned | Milestone:  1.2 
  
 Component:  Cache system |   Version:  SVN 
  
Resolution:   |  Keywords:  cache pylibmc 
memcached.py
 Stage:  Accepted | Has_patch:  0   
  
Needs_docs:  0|   Needs_tests:  0   
  
Needs_better_patch:  0|  
--+-
Comment (by jammons):

 So rather than add other fallback we were thinking that one could specify
 the preferred memcached backend as follows:
 CACHE_BACKEND = memcached://server:port?lib=memcache

 Where memcache could be cmemcache, memcache, or some other python module.
 If an engine is not specified, it will default to the current behavior of
 cmemcache then memcache fallback.

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Re: [Django] #11675: [patch] Support new memcached wrapper pylibmc

[Django]

#11675: [patch] Support new memcached wrapper pylibmc
--+-
  Reporter:  pipp...@yahoo.co.jp  | Owner:  otherjacob  
  
Status:  assigned | Milestone:  1.2 
  
 Component:  Cache system |   Version:  SVN 
  
Resolution:   |  Keywords:  cache pylibmc 
memcached.py
 Stage:  Accepted | Has_patch:  0   
  
Needs_docs:  0|   Needs_tests:  0   
  
Needs_better_patch:  0|  
--+-
Changes (by otherjacob):

  * owner:  nobody => otherjacob
  * status:  new => assigned
  * has_patch:  1 => 0

Comment:

 I'm going to go ahead and adopt Alex's suggestion for future library
 support.

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