Host MVFS settings

For hosts that have the MVFS installed, the MVFS tab of the Host Properties dialog box displays MVFS cache settings for the host.

The following properties are modifiable if the host supports remote administration and you are a member of the ClearCase administrators group, or if the host is the local host:

Scaling factor: An integer value in the range 1-5 from which most other MVFS cache values are derived. (Changes in some values based on the scaling factor do not take effect until you restart the host.)

Maximum mnodes for free list: An mnode is a data structure used by the MVFS to represent a file or directory. The scaling factor determines the total number of mnodes allocated when the MVFS starts. An mnode on the VOB free list was used recently but is currently idle. By keeping more mnodes on the free list, the time needed to reopen the associated file is reduced.

Maximum mnodes for cleartext free list: The cleartext free list is a collection of pointers to file objects in a storage pool. Caching these pointers speeds reopening of an MVFS-resident file, but consumes additional resources.

Maximum entries for files: The file cache holds pointers to recently accessed files.

Maximum entries for directories: The directory cache holds pointers to recently accessed directories.

Maximum entries for nonexistent names: This cache holds the names of files and directories for which a recent lookup failed. When presented with a file or directory name, the MVFS first looks in these caches. If it cannot find a matching entry, it must make an RPC to the view server. Each cache entry consumes approximately 100 bytes

Maximum RPC handles: One RPC handle is used for each RPC in progress from the MVFS to a view server. If the cache is 100% full and you perform large builds with many simultaneously active processes, you may want to increase this cache size to reduce the time required to perform an RPC. After an RPC handle is added to this cache, it remains available until the host is restarted.

Related concepts

For more information about ...
See ...
Permission to change the properties of a remote host
ClearCase administrative permissions
MVFS cache tuning and client performance
Administrator's Guide

Feedback