Red Hat 8.1 - Manual (Page 255)

PTA
Mechanism by which one Directory Server consults another to check bind credentials. Also
pass-through authentication .
PTA directory server
In pass-through authentication ( PTA ), the PTA Directory Server is the server that sends
(passes through) bind requests it receives to the authenticating directory server .
PTA LDAP URL
In pass-through authentication, the URL that defines the authenticating directory server , pass-
through subtree(s), and optional parameters.
R
RAM
Random access memory. The physical semiconductor-based memory in a computer.
Information stored in RAM is lost when the computer is shut down.
rc.local
A file on Unix machines that describes programs that are run when the machine starts. It is also
called /etc/rc.local because of its location.
RDN
The name of the actual entry itself, before the entry's ancestors have been appended to the
string to form the full distinguished name. Also
relative distinguished name .
read-only replica
A replica that refers all update operations to read-write replicas. A server can hold any number
of read-only replicas.
read-write replica
A replica that contains a master copy of directory information and can be updated. A server can
hold any number of read-write replicas.
referential integrity
Mechanism that ensures that relationships between related entries are maintained within the
directory.
referral
(1) When a server receives a search or update request from an LDAP client that it cannot
process, it usually sends back to the client a pointer to the LDAP sever that can process the
request.
(2) In the context of replication, when a read-only replica receives an update request, it forwards
it to the server that holds the corresponding read-write replica. This forwarding process is
called a referral.
relative distinguished name
See RDN .
replica
A database that participates in replication.
replica-initiated replication
Red Hat Directory Server 8.1 Configuration and Command Reference
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