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Plan 9 - man page for cfs (plan9 section 4)

CFS(4)				     Kernel Interfaces Manual				   CFS(4)

NAME
       cfs - cache file system

SYNOPSIS
       cfs -s [-rd] [-f partition]

       cfs -a netaddr [-rd] [-f partition] [mtpt]

DESCRIPTION
       Cfs  is	a  user-level file server that caches information about remote files onto a local
       disk.  It is normally started by the kernel at boot time, though users may start it  manu-
       ally.   Cfs  is	interposed  between  the kernel and a network connection to a remote file
       server to improve the efficiency of access across slow network connections such	as  modem
       lines.	On  each open of a file cfs checks the consistency of cached information and dis-
       cards any old information for that file.

       Cfs mounts onto mtpt (default /) after connecting to the file server.

       The options are:

       s      the connection to the remote file server is on file descriptors 0 and 1.

       a netaddr
	      dial the destination netaddr to connect to a remote file server.

       r      reformat the cache disk partition.

       d      turn on debugging

       f partition
	      use file partition as the cache disk partition.

       All 9P messages except read, clone,  and  walk  (see  intro(5))	are  passed  through  cfs
       unchanged  to the remote server.  A clone followed immediately by a walk is converted into
       a clwalk.  If possible, a read is satisfied by cached data.  Otherwise, the file server is
       queried for any missing data.

FILES
       /dev/hd0cache
	      Default file used for storing cached data.

SOURCE
       /sys/src/cmd/cfs

											   CFS(4)


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