Rational ClearCase server processes

Rational® ClearCase® is a distributed application. Many of its operations involve several host computers and several server processes on each host.

These servers do not usually need to be explicitly configured, started, stopped, or managed. The information in these topics is intended to help you understand status and error messages that these servers generate, to access server logs, and to understand the role each server process plays in a Rational ClearCase network.

Two server processes— albd_server and admin_server—run on every host that has been configured to support local VOBs and views, regardless of whether any VOBs or views have been created on the host. Other server processes are started as necessary to manage any VOBs and views that reside on the host.

Note: No Rational ClearCase server processes run on a Rational ClearCase client host or on a Rational ClearCase host that has been configured with no support for local VOBs and views.

albd_server process
When a client program needs access to a service (a VOB or view server, for example) on a Rational ClearCase server host, it uses a remote procedure call (RPC) to send a request to the albd_server process on that host. The albd_server starts the requested service if it is not already started, and provides the service's port number to the client. Thereafter, the client communicates directly with the service.
admin_server process
The Rational ClearCase administration server (admin_server) is invoked as needed by the host’s albd_server process. This short-lived server performs miscellaneous administrative support functions.
credmap_server process
The credentials mapping server,credmap_server, runs on any Rational ClearCase host that is configured to support local VOBs and views. This server handles credentials mapping in environments where users access a common set of VOBs and views from computers running different supported operating systems.
view_server process
A view_server is a long-lived process that manages activity in a particular view.
vob_server process
For each VOB, a long-lived vob_server process runs on the VOB host. The vob_server manipulates data in the VOB storage pools in response to requests from client processes.
db_server process
The db_server processes manage VOB database transactions on a host in response to requests from client programs.
vobrpc_server process
Each VOB server host runs one or more vobrpc_server processes for each of its VOBs.
lockmgr process
On Windows hosts and some Linux hosts that are VOB servers, a lock manager arbitrates transaction requests to all VOB databases on that host.

Parent topic: Rational ClearCase network planning and administration