Plan 9 - man page for cfs (plan9 section 4)
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cfs - cache file system
cfs -s [-rd] [-f partition]
cfs -a netaddr [-rd] [-f partition] [mtpt]
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.
dial the destination netaddr to connect to a remote file server.
r reformat the cache disk partition.
d turn on debugging
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.
Default file used for storing cached data.
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