CFS(4) Kernel Interfaces Manual CFS(4)NAMEcfs - cache file systemSYNOPSIScfs -s [-rd] [-f partition] cfs -a netaddr [-rd] [-f partition] [mtpt]DESCRIPTIONCfs 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 manually. 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 discards 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 imme- diately 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)