The Rational ClearCase File Service

The Rational® ClearCase® File Service (CCFS) is a TCP/IP-based file transfer mechanism.

When CCFS is in use, file transfers between a VOB and snapshot view (for example, operations such as adding a file to source control, updating it in the view, and checking it out or in) take place over a standard TCP/IP connection created by CCFS.

CCFS is used whenever a snapshot view accesses VOB data. CCFS is used by Rational ClearCase to enable cross-platform file transfers between VOBs and snapshot views.

On Linux® and on the UNIX® system, CCFS is used to support access by snapshot views to VOBs on Windows®.
On Windows, the native network file system is typically used to support access to by snapshot views to VOBs on Windows. You can enable CCFS to support access by snapshot views to VOBs on Linux and on the UNIX system.

CCFS and remote Windows view server hosts

Rational ClearCase hosts that use snapshot views but cannot run a local view_server process use CCFS as their sole file-transfer mechanism when accessing VOBs on Linux and the UNIX system. Snapshot views on these clients require another Windows computer to run the view_server processes and host the view storage directories associated that support these views.

CCFS must be enabled on any Windows computer that performs this role. A Windows computer configured to use an NFS client product to access VOBs hosted on Linux or the UNIX system cannot provide view_server support for Rational ClearCase clients that cannot run a local view_server process.