mirror of
https://git.openldap.org/openldap/openldap.git
synced 2024-12-27 03:20:22 +08:00
125 lines
3.4 KiB
Groff
125 lines
3.4 KiB
Groff
.TH LDAP_CACHE 3 "22 September 1998" "OpenLDAP LDVERSION"
|
|
.\" $OpenLDAP$
|
|
.\" Copyright 1998-2000 The OpenLDAP Foundation All Rights Reserved.
|
|
.\" Copying restrictions apply. See COPYRIGHT/LICENSE.
|
|
.SH NAME
|
|
ldap_enable_cache, ldap_disable_cache, ldap_destroy_cache, ldap_flush_cache, ldap_uncache_entry, ldap_uncache_request, ldap_set_cache_options \- LDAP client caching routines
|
|
.SH SYNOPSIS
|
|
.nf
|
|
.ft B
|
|
#include <ldap.h>
|
|
.ft
|
|
.LP
|
|
.ft B
|
|
ldap_enable_cache( ld, timeout, maxmem )
|
|
.ft
|
|
LDAP *ld;
|
|
long timeout;
|
|
long maxmem;
|
|
.LP
|
|
.ft B
|
|
void ldap_disable_cache( ld )
|
|
.ft
|
|
LDAP *ld;
|
|
.LP
|
|
.ft B
|
|
void ldap_destroy_cache( ld )
|
|
.ft
|
|
LDAP *ld;
|
|
.LP
|
|
.ft B
|
|
void ldap_flush_cache( ld )
|
|
.ft
|
|
LDAP *ld;
|
|
.LP
|
|
.ft B
|
|
void ldap_uncache_entry( ld, dn )
|
|
.ft
|
|
LDAP *ld;
|
|
char *dn;
|
|
.LP
|
|
.ft B
|
|
void ldap_uncache_request( ld, msgid )
|
|
.ft
|
|
LDAP *ld;
|
|
int msgid;
|
|
.LP
|
|
.ft B
|
|
void ldap_set_cache_options( ld, opts )
|
|
.ft
|
|
LDAP *ld;
|
|
unsigned long opts;
|
|
.fi
|
|
.SH DESCRIPTION
|
|
.LP
|
|
These routines are used to control the behavior of the
|
|
.B experimental
|
|
client caching of
|
|
.BR ldap_search (3)
|
|
and
|
|
.BR ldap_compare (3)
|
|
operations. By
|
|
default, the cache is disabled and no caching is done. Enabling the
|
|
cache can greatly improve performance and reduce network bandwidth when
|
|
a client DUA makes repeated requests.
|
|
.LP
|
|
.B ldap_enable_cache()
|
|
should be called to turn on local caching or to
|
|
change cache parameters (lifetime of cached requests and memory used).
|
|
The \fIld\fP parameter should be the result of a successful call to
|
|
.BR ldap_open (3).
|
|
The \fItimeout\fP is specified in seconds, and is used to
|
|
decide how long to keep cached requests. The \fImaxmem\fP value is in
|
|
bytes, and is used to set an upper bound on how memory the cache will
|
|
use. You can specify 0 for \fImaxmem\fP to restrict the cache size by
|
|
the \fItimeout\fP only. The first call to ldap_enable_cache creates
|
|
the cache; subsequent calls re-enable the cache and set the timeout and
|
|
memory values.
|
|
.LP
|
|
.B ldap_disable_cache()
|
|
temporarily disables use of the cache (new
|
|
requests are not cached and the cache is not checked when returning
|
|
results). It does not delete the cache contents.
|
|
.LP
|
|
.B ldap_destroy_cache()
|
|
turns off caching and completely removes the cache from memory.
|
|
.LP
|
|
.B ldap_flush_cache()
|
|
deletes the cache contents, but does not effect it in any other way.
|
|
.LP
|
|
.B ldap_uncache_entry()
|
|
removes all requests that make reference to the
|
|
distinguished name \fIdn\fP from the cache. It should be used, for
|
|
example, after doing an
|
|
.BR ldap_modify (3)
|
|
call involving \fIdn\fP.
|
|
.LP
|
|
.B ldap_uncache_request()
|
|
removes the request indicated by the LDAP request
|
|
id \fImsgid\fP from the cache.
|
|
.LP
|
|
.B ldap_set_cache_options()
|
|
is used to change caching behavior. The current supported options are
|
|
.B LDAP_CACHE_OPT_CACHENOERRS
|
|
to suppress caching of any requests that result in an error, and
|
|
.B LDAP_CACHE_OPT_CACHEALLERRS
|
|
to enable caching of all requests. The default behavior is to not
|
|
cache requests that result in errors, except that request that result
|
|
in the error
|
|
.B LDAP_SIZELIMIT_EXCEEDED
|
|
are cached.
|
|
.SH ERRORS
|
|
.B ldap_enable_cache()
|
|
returns 0 upon success, and -1 if it is unable to
|
|
allocate space for the cache. All the other calls are declared as
|
|
void and return nothing.
|
|
.SH SEE ALSO
|
|
.BR ldap (3),
|
|
.BR ldap_search (3),
|
|
.BR ldap_compare (3)
|
|
.SH ACKNOWLEDGEMENTS
|
|
.B OpenLDAP
|
|
is developed and maintained by The OpenLDAP Project (http://www.openldap.org/).
|
|
.B OpenLDAP
|
|
is derived from University of Michigan LDAP 3.3 Release.
|