Setting or changing the caching mode for a VxFS cache area

For a VxFS cache area, the caching mode determines what kind of caching is performed for the specified mount point. The mode can be nocache, read, or writeback. The default mode is read.

A VxVM cache area only supports read mode.

You cannot change the type (VxVM or VxFS) of a cache area. You must destroy the cache area and create a new cache area of the required type.

You can set the caching mode of a VxFS mount point with the -o smartiomode option. The caching mode that is set with the mount command represents the highest level of caching that can be enabled for objects on the mount point. If you specify nocache mode, the SmartIO caching is disabled for the mount point. You cannot enable SmartIO caching for any data objects in that mount point. You must remount the file system to enable caching.

Similarly, if you specify read mode during the mount, you cannot enable SmartIO writeback caching for any data objects in that mount point.

To set the caching mode of a VxFS mount point

To change the caching mode of a VxFS mount point