mount_cachefs man page on HP-UX

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mount_cachefs(1M)					     mount_cachefs(1M)

NAME
       mount_cachefs: mount, umount - mount and unmount CacheFS file systems

SYNOPSIS

	      [specific_options] resource mount_point

       mount_point

DESCRIPTION
       The  utility  attaches a named resource to the file system hierarchy at
       the pathname  location  mount_point,  which  must  already  exist.   If
       mount_point  has	 any  contents	prior  to  the operation, the contents
       remain hidden until the resource is once again unmounted.  The CacheFS-
       specific	 version of the command mounts a cached file system; if neces‐
       sary, it NFS-mounts its back file system.  It also provides a number of
       options that are CacheFS-specific for controlling the caching process.

       CacheFS	can  be used only with NFSv2 or NFSv3.	It cannot be used with
       NFSv4.  If NFSv4 is enabled by default CacheFS mount fails, unless  the
       user specifies that vers is 2 or 3.  See mount_nfs(1M) for the descrip‐
       tion of vers.

       The utility unmounts mounted file systems.

       Only a superuser can mount and unmount file systems.

       See mount_nfs(1M) for the description of resource.

   Options (mount)
       See mount(1M) for the description of the options.

       Set file system specific options according to a comma-separated
	    list with no intervening spaces.  Notice that the backfstype argu‐
	    ment must be specified.
	    Specifies  that cached attributes are held for no more than n sec‐
	    onds after directory  update.   After  n  seconds,	all  directory
	    information	 is  purged from the cache.  The default value is sec‐
	    onds.

	    Specifies that cached attributes are held
		   for at least n seconds after	 directory  update.   After  n
		   seconds,  CacheFS  checks to see if the directory modifica‐
		   tion time on the back file system has changed.  If it  has,
		   all	information  about  the	 directory  is purged from the
		   cache and new data is retrieved from the back file  system.
		   The default value is seconds.

	    Specifies that cached attributes are held for no more than
		   n  seconds  after  file modification.  After n seconds, all
		   file information is purged from  the	 cache.	  The  default
		   value is seconds.

	    Specifies that cached attributes are held for at least
		   n  seconds  after  file  modification.   After  n  seconds,
		   CacheFS checks to see if the file modification time on  the
		   back	 file  system has changed.  If it has, all information
		   about the file is purged from the cache  and	 new  data  is
		   retrieved  from the back file system.  The default value is
		   seconds.

	    Sets   and to n.

	    The file system type of the back file system (for
		   example,

	    Specifies where the back file system is already mounted.
		   If this argument is	not  supplied,	CacheFS	 determines  a
		   mount point for the back file system.

	    The name of the cache directory.

	    ID	   is  a  string  specifying a particular instance of a cache.
		   If you do not specify a cache ID,  CacheFS  will  construct
		   one.

	    Verifies cache consistency only when explicitly
		   requested,  rather  than  periodic checking that is done by
		   default.  A consistency check is  requested	by  using  the
		   option of the command.  This option is useful for back file
		   systems that change infrequently, for example, The and  are
		   mutually exclusive.

	    Causes the front file system to interpret the mode bits
		   used	 for  access  checking instead of having the back file
		   system verify access permissions.  Do not use this argument
		   with secure NFS .

	    Disables cache consistency checking.
		   By  default,	 periodic  consistency	checking  is  enabled.
		   Specify only when you know that the back file  system  will
		   not be modified.  Trying to perform cache consistency check
		   using will result in error.	The and	 are  mutually	exclu‐
		   sive.

	    Disable ACL functionality.
		   If  you  try	 to change ACL entries for a file on a CacheFS
		   file system mounted with the option an error	 is  returned.
		   However,  if	 you  try  to  get the ACL entries for a file,
		   CacheFS will return fabricated ACL entries  by  using  UNIX
		   file permissions.  By default, the CacheFS file system sup‐
		   ports ACL functionality.  See aclv(5) for a description  of
		   ACL entries.

	    Purge any cached information for the specified file
		   system.

	    Remounts a read-only file system as read-write (using
		   the rw option).

	    If specified when mounting a CacheFS file system, a
		   binary  will	 be  read and populated in the cache the first
		   time it is loaded.  Subsequent access to the binary will be
		   satisfied from the cache.

	    Read-write (default) or read-only.

	    Allow (default) or disallow set-uid execution.

	    Verifies the cache consistency with the NFS client's
		   copy	 of  file attributes, and coordinates with bakfs (NFS)
		   for delayed flushing of modified pages to the server.   The
		   delayed  flushing of pages improves CacheFS response times.
		   The must not be used when multiple  clients	are  modifying
		   the same file.  The and options are mutually exclusive.

	    Write modes for CacheFS.
		   The mode (the default) handles writes the same as NFS does;
		   that is, writes are made to the back file system,  and  the
		   affected  file  is  purged from the cache.  You can use the
		   mode when you are sure that no one else will be writing  to
		   the	cached file system.  In this mode, all writes are made
		   to both the front and the back file system,	and  the  file
		   remains in the cache.

       Overlay mount.
	    Allow  the file system to be mounted over an existing mount point,
	    making the underlying file system inaccessible.   If  a  mount  is
	    attempted on a pre-existing mount point without setting this flag,
	    the mount will fail, producing the error "device busy".

       When processing an unknown
	    specific_option, the utility prints a  warning  message  and  pro‐
	    cesses  the	 next  one.  This option prevents printing the warning
	    message.

EXAMPLES
       CacheFS-mount the file system which is already NFS-mounted on as

       Lines similar to the following appear in the file after the command  is
       executed:

       Mount a CacheFS filesystem over NFS Version 2.

AUTHOR
       was developed by Sun Microsystems, Inc.

SEE ALSO
       cfsadmin(1M), fsck_cachefs(1M), mount(1M).

							     mount_cachefs(1M)
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