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Re: Caching queries

Buchan Milne skrev, on 08-02-2008 16:29:


       The  pcache  overlay to slapd(8) allows caching of LDAP search requests
       (queries) in a local database.  For an incoming query, the proxy  cache
       determines its corresponding template. If the template was specified as
       cacheable using the proxytemplate directive and  the  request  is  conâ
       tained  in a cached request, it is answered from the proxy cache.  Othâ
       erwise, the search is performed as usual and cacheable  search  results
       are saved in the cache for use in future queries.


Or, are you implying that pcache is broken in 2.3.3x (I don't use it myself).

"Well", he answered cautiously, "it (at least the 2.4 man page) also goes on to say:

Caching data is prone to inconsistencies because updates on the remote server will not be reflected in the response of the cache at least (and at most) for the duration of the proxytemplate TTL."

The general acceptance of any-brand query caching by LDAP "experts" such as Victor Duchovny of Postfix fame is that ... leave it alone, we don't support it, if you try it and it doesn't work, then I don't want to know.

My original answer to OP still stands: he should get equivalent functionality from connection caching.



Tony Earnshaw
Email: tonni at hetnet dot nl