бэкэнд метакаталога для slapd (metadirectory backend to slapd)
Описание (Description)
The meta backend to slapd(8) performs basic LDAP proxying with
respect to a set of remote LDAP servers, called "targets". The
information contained in these servers can be presented as
belonging to a single Directory Information Tree (DIT).
A basic knowledge of the functionality of the slapd-ldap(5)
backend is recommended. This backend has been designed as an
enhancement of the ldap backend. The two backends share many
features (actually they also share portions of code). While the
ldap backend is intended to proxy operations directed to a single
server, the meta backend is mainly intended for proxying of
multiple servers and possibly naming context masquerading. These
features, although useful in many scenarios, may result in
excessive overhead for some applications, so its use should be
carefully considered. In the examples section, some typical
scenarios will be discussed.
The proxy instance of slapd(8) must contain schema information
for the attributes and objectClasses used in filters, request DN
and request-related data in general. It should also contain
schema information for the data returned by the proxied server.
It is the responsibility of the proxy administrator to keep the
schema of the proxy lined up with that of the proxied server.
Note: When looping back to the same instance of slapd(8), each
connection requires a new thread; as a consequence, the slapd(8)
threads parameter may need some tuning. In those cases, unless
the multiple target feature is required, one may consider using
slapd-relay(5) instead, which performs the relayed operation
internally and thus reuses the same connection.
