[wp-trac] [WordPress Trac] #11431: object cache's terms bucket potentially contains junk

[WordPress Trac]

#11431: object cache's terms bucket potentially contains junk
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 Reporter:  Denis-de-Bernardy  |       Owner:  ryan     
     Type:  enhancement        |      Status:  new      
 Priority:  normal             |   Milestone:  3.0      
Component:  Cache              |     Version:           
 Severity:  normal             |    Keywords:  has-patch
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Comment(by Denis-de-Bernardy):

 Replying to [comment:3 filosofo]:
 > Why not do something like I suggested a while ago: #4476.  Delete cache
 items by group name.  Then the clean_term_cache() could just flush all
 members of the "terms" group.  Problem solved, right?

 It would, if memcached allowed to partially flush keys using wildcards.
 Trouble is, memcached offers only two option, mark this very specific key
 as obsolete, and mark all keys as obsolete.

 there are a few bits in backpress' memcached that allow to to flush an
 entire bucket, but I'm 100% sure that it is not concurrent proof: (I
 interacted the pecl package's author last year in order to convince him to
 implement locks for memcached-based session handling. It's the only thing
 in the memcached pecl with any type of locking.)

 @Ryan: the file I sent you the other day implements flush (as in, full
 flush) quite fine. But no partial flush.

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Ticket URL: <http://core.trac.wordpress.org/ticket/11431#comment:5>
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