Proxy cache engine
LDAP cache is a special type of replica which holds entry corresponding to search filters instead of a subtree. A list of cacheable templates are specified at configuration time, and a query is cached only if it belongs to one of these templates.
Proxy cache configuration
This is an example database section configuration snippet for a caching server:
database ldap
suffix "dc=nowhere,dc=local"
rootdn "dc=nowhere,dc=local"
uri ldap://ldap.nowhere.local/dc=nowhere%2cdc=local
overlay proxycache
proxyCache bdb 100000 1 1000 1
proxyAttrset 0 mail telephonenumber
proxyTemplate (sn=) 0 3600
proxyTemplate (&(sn=)(givenName=)) 0 3600
cachesize 20
directory /var/lib/ldap/dc=nowhere,dc=local
index objectClass eq
index cn,sn,uid,mail pres,eq,sub
proxyCache <DB> <maxentries> <nattrset> <entrylimit> <period>This directive enables proxy caching.
<DB>specifies the database type to use,<maxentries>represents the maximum number of entries to be held in the cache,<nattrset>specifies the total number of attribute serts that may be defined,<entrylimit>represents the maximum number of entries in a cacheable query,<period>specifies the interval, in seconds, between consistency checks.proxyAttrset <index> <attributes>Associate a set of attributes to an index (0..
<nattrset>-1).proxyTemplate <prototype> <attrset index> <TTL>Specifies a cacheable template.
<prototype>is the filter string to use,<attrset index>is the index of the required attributes set,<TTL>is the time to live after which the queries belonging to the template will expire.
