gistfile1.txt

# varnishd -a 127.0.0.1:1111 -f /etc/varnish/default.vcl -s file,/tmp/foo.cache,4G
# ls /tmp/foo.cache  -lh
-rw------- 1 root root 4.0G Oct 29 14:14 /tmp/foo.cache
# pkill varnishd 
# ps aux  | grep varnishd
kristian  7619  0.0  0.0  17148  3220 pts/10   S+   14:13   0:00 man varnishd
root      7908  0.0  0.0  12692  2220 pts/4    S+   14:14   0:00 grep varnishd
# ls /tmp/foo.cache  -lh
-rw------- 1 root root 4.0G Oct 29 14:14 /tmp/foo.cache
# varnishd -a 127.0.0.1:1111 -f /etc/varnish/default.vcl -s file,/tmp/foo.cache,1G
WARNING: (-sfile) file size reduced to 40241768038 (80% of available disk space)
# ls /tmp/foo.cache  -lh
-rw------- 1 root root 38G Oct 29 14:14 /tmp/foo.cache