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Re: LDAP Caching

To: Marten Lehmann <lehmann@cnm.de>
Subject: Re: LDAP Caching
From: Howard Chu <hyc@symas.com>
Date: Fri, 18 Sep 2009 00:39:03 -0700
Cc: openldap-software@openldap.org
In-reply-to: <4AB2AC63.1020506@cnm.de>
References: <4AB2AC63.1020506@cnm.de>
User-agent: Mozilla/5.0 (X11; U; Linux x86_64; rv:1.9.1b5pre) Gecko/20090909 SeaMonkey/2.0a1pre Firefox/3.0.3

Marten Lehmann wrote:

Hello,

does openldap implement sort of caching?


Yes.

Or does it completely rely on
the underlying database like bdb (default)?


No.

Read the documentation.

I'm noticing an intensive
i/o load while the complete slapcat export of our ldap data is only
about 34MB big so everything besides writing/updating should fit into
the memory.

Caching only helps if a particular piece of data will be used more than once.When you slapcat a database you extract every entry once and never use itagain. I.e., most cache settings have very little benefit for slapcat.


--
  -- Howard Chu
  CTO, Symas Corp.           http://www.symas.com
  Director, Highland Sun     http://highlandsun.com/hyc/
  Chief Architect, OpenLDAP  http://www.openldap.org/project/

References:
- LDAP Caching
  - From: Marten Lehmann <lehmann@cnm.de>

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