scm470 appendix

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1 IBM Software Group ® Mastering Rational ClearCase Administration for Windows Appendix: ClearCase Processes

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SCM470

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Page 1: SCM470 Appendix

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IBM Software Group

®

Mastering Rational ClearCase Administration for WindowsAppendix: ClearCase Processes

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ClearCase Environment and Processes

Multi-Versioned Filesystem (MVFS) Services

Location broker (albd_server) Lock manager (lockmgr)

Servers Database server (db_server) View server (view_server) VOB server (vob_server) RPC server (vobrpc_server)

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Provides transparent access to versioned files as selected through a view.

Performs build auditing for clearmake targets. Maintains several caches to maximize performance. Provides tools to monitor the efficiency of MVFS

operations. Uses NFS-like RPCs to obtain information from the

view.

Multi-Versioned Filesystem (MVFS)

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Atria Location Broker (albd_server)

Master server Handles license requests Runs on each ClearCase host Configured as a logon service with a dedicated

user and group Starts when ClearCase starts

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Lock Manager (lockmgr)

Receives RPC requests for locks (read/write operations on database).

Polled by client programs (db_server and vobrpc_server) to determine whether to grant it access to VOB data.

Runs on a VOB host. Starts when ClearCase starts.

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Database Server (db_server)

Created as needed by albd_server to process VOB transactions.

One for each client accessing a VOB. Terminated by albd_server when idle.

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View Server (view_server)

Performs version selection for a view Started by albd_server, as needed, on the host

where view storage resides Remains active until one of the following occurs:

You shut down ClearCase You use the cleartool endview_server command You use the cleartool rmview command

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VOB Server (vob_server)

Creates, deletes, and controls Windows NT permissions on data containers

Started by albd_server as needed on the host where the VOB storage resides

Remains active until ClearCase is shut down or the cleartool rmvob command is issued

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RPC Server (vobrpc_server)

Handles requests from view_server Forwards storage pool access requests to the

vob_server Started by albd_server as needed Accesses the VOB database in exactly the same

way as a db_server Terminated by albd_server when idle

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Determining Service State

Start the Task Manager bypressing Ctrl+Alt+Delete andclicking Task Manager.

Select the Processes tab toview service process status.

You can use the Windows Task Manager to determine the state of ClearCase services:

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Controlling ClearCase Services

Check service status in the Services Startup tab of the ClearCase control panel.

Start or stop a service under Services in the Windows control panel > Administrative Tools section.

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