Hello, I'm running some initial tests in a clean Fedora 11 envrionment (all updates, but no additional patches installed). I'm NFS mounting and trying to cache a remote directory connected through a relatively slow link - my hope is to see the accelerating effects of the cache especially well with such a setup. Everything seems to be working out of the box - but I see no actual caching taking place: the cache in /var/fscache remains completely empty, and I see no acceleration: reading the same set of files again and again takes the same amount of time with fscache running (see below), compared to a plain NFS mount (without "-o fsc") and without fscache running. Obviously I must be missing something. Here is the data I collected - maybe anybody can see what I'm doing wrong? # cat /etc/cachefilesd.conf ############################################################################### # # Copyright (C) 2006 Red Hat, Inc. All Rights Reserved. # Written by David Howells (dhowells@xxxxxxxxxx) # # This program is free software; you can redistribute it and/or # modify it under the terms of the GNU General Public License # as published by the Free Software Foundation; either version # 2 of the License, or (at your option) any later version. # ############################################################################### dir /var/fscache tag wd_gemini brun 10% bcull 7% bstop 3% frun 10% fcull 7% fstop 3% # mount -t nfs gemini:/home/wd/Mail /home/wd/Mail -o fsc # mount /dev/mapper/vg0-fedora10 on / type xfs (rw) proc on /proc type proc (rw) sysfs on /sys type sysfs (rw) devpts on /dev/pts type devpts (rw,gid=5,mode=620) /dev/sda1 on /boot type ext3 (rw) /dev/mapper/vg0-root on /fedora7 type ext3 (rw) /dev/mapper/vg0-home_private on /home_private type ext3 (rw) /dev/mapper/vg1-backup on /backup type ext3 (rw) tmpfs on /dev/shm type tmpfs (rw) none on /proc/sys/fs/binfmt_misc type binfmt_misc (rw) sunrpc on /var/lib/nfs/rpc_pipefs type rpc_pipefs (rw) castor:/home on /home type nfs (rw,addr=10.0.0.10) nfsd on /proc/fs/nfsd type nfsd (rw) gemini:/home/wd/Mail on /home/wd/Mail type nfs (rw,fsc,addr=10.1.0.2) # cat /proc/fs/nfsfs/* NV SERVER PORT USE HOSTNAME v3 0a010002 0 1 gemini v3 0a00000a 0 1 castor NV SERVER PORT DEV FSID FSC v3 0a00000a 0 0:19 380c898c162893fb no v3 0a010002 0 0:20 cf0d1132eaeab9c4 yes # service cachefilesd start Starting cachefilesd: [ OK ] # df -h /var/fscache/ Filesystem Size Used Avail Use% Mounted on /dev/mapper/vg0-f11 117G 14G 104G 12% / # ls /proc/sys/fs/nfs/ idmap_cache_timeout nfs_congestion_kb nlm_grace_period nlm_timeout nsm_local_state nfs_callback_tcpport nfs_mountpoint_timeout nlm_tcpport nlm_udpport nsm_use_hostnames # ls /proc/fs/fscache stats # cat /proc/fs/fscache/stats FS-Cache statistics Cookies: idx=18 dat=905 spc=0 Objects: alc=0 nal=0 avl=0 ded=2 ChkAux : non=0 ok=0 upd=0 obs=0 Pages : mrk=0 unc=0 Acquire: n=923 nul=0 noc=0 ok=923 nbf=0 oom=0 Lookups: n=0 neg=0 pos=0 crt=0 Updates: n=0 nul=0 run=0 Relinqs: n=638 nul=0 wcr=0 AttrChg: n=0 ok=0 nbf=0 oom=0 run=0 Allocs : n=0 ok=0 wt=0 nbf=0 Allocs : ops=0 owt=0 Retrvls: n=913 ok=0 wt=0 nod=0 nbf=913 int=0 oom=0 Retrvls: ops=0 owt=0 Stores : n=0 ok=0 agn=0 nbf=0 oom=0 Stores : ops=0 run=0 Ops : pend=0 run=0 enq=0 Ops : dfr=0 rel=0 gc=0 # ls -laR /var/fscache/ /var/fscache/: total 4 drwxr-xr-x 4 root root 34 Oct 16 23:37 . drwxr-xr-x. 24 root root 4096 Oct 16 23:29 .. drwx------ 2 root root 6 Oct 16 23:37 cache drwx------ 2 root root 6 Oct 16 23:37 graveyard /var/fscache/cache: total 0 drwx------ 2 root root 6 Oct 16 23:37 . drwxr-xr-x 4 root root 34 Oct 16 23:37 .. /var/fscache/graveyard: total 0 drwx------ 2 root root 6 Oct 16 23:37 . drwxr-xr-x 4 root root 34 Oct 16 23:37 .. # cat /proc/fs/fscache/stats FS-Cache statistics Cookies: idx=20 dat=1574 spc=0 Objects: alc=478 nal=0 avl=478 ded=2 ChkAux : non=0 ok=0 upd=0 obs=0 Pages : mrk=4033 unc=0 Acquire: n=1594 nul=0 noc=0 ok=1594 nbf=0 oom=0 Lookups: n=478 neg=478 pos=0 crt=478 Updates: n=0 nul=0 run=0 Relinqs: n=1115 nul=0 wcr=0 AttrChg: n=0 ok=0 nbf=0 oom=0 run=0 Allocs : n=0 ok=0 wt=0 nbf=0 Allocs : ops=0 owt=0 Retrvls: n=1583 ok=0 wt=474 nod=476 nbf=1107 int=0 oom=0 Retrvls: ops=476 owt=47 Stores : n=4033 ok=4033 agn=0 nbf=0 oom=0 Stores : ops=492 run=4525 Ops : pend=47 run=921 enq=4525 Ops : dfr=0 rel=968 gc=0 related syslog messages: Oct 17 22:23:26 nyx cachefilesd[11412]: About to bind cache Oct 17 22:23:26 nyx kernel: FS-Cache: Cache "wd_gemini" added (type cachefiles) Oct 17 22:23:26 nyx kernel: CacheFiles: File cache on dm-2 registered Oct 17 22:23:26 nyx cachefilesd[11412]: Bound cache Oct 17 22:23:26 nyx cachefilesd[11414]: Daemon Started Oct 17 22:23:26 nyx cachefilesd[11414]: Scan complete Oct 17 22:23:56 nyx cachefilesd[11414]: Refilling cull table Oct 17 22:23:56 nyx cachefilesd[11414]: Scan complete Oct 17 22:24:26 nyx cachefilesd[11414]: Refilling cull table Oct 17 22:24:26 nyx cachefilesd[11414]: Scan complete Oct 17 22:24:56 nyx cachefilesd[11414]: Refilling cull table Oct 17 22:24:56 nyx cachefilesd[11414]: Scan complete Oct 17 22:25:27 nyx cachefilesd[11414]: Refilling cull table Oct 17 22:25:27 nyx cachefilesd[11414]: Scan complete Oct 17 22:25:57 nyx cachefilesd[11414]: Refilling cull table Oct 17 22:25:57 nyx cachefilesd[11414]: Scan complete Oct 17 22:26:27 nyx cachefilesd[11414]: Refilling cull table Oct 17 22:26:27 nyx cachefilesd[11414]: Scan complete Oct 17 22:26:57 nyx cachefilesd[11414]: Refilling cull table Oct 17 22:26:57 nyx cachefilesd[11414]: Scan complete Oct 17 22:27:27 nyx cachefilesd[11414]: Refilling cull table Oct 17 22:27:27 nyx cachefilesd[11414]: Scan complete Oct 17 22:27:57 nyx cachefilesd[11414]: Refilling cull table Oct 17 22:27:57 nyx cachefilesd[11414]: Scan complete Oct 17 22:28:27 nyx cachefilesd[11414]: Refilling cull table Oct 17 22:28:27 nyx cachefilesd[11414]: Scan complete Oct 17 22:28:57 nyx cachefilesd[11414]: Refilling cull table Oct 17 22:28:57 nyx cachefilesd[11414]: Scan complete Oct 17 22:29:27 nyx cachefilesd[11414]: Refilling cull table Oct 17 22:29:27 nyx cachefilesd[11414]: Scan complete Oct 17 22:29:57 nyx cachefilesd[11414]: Refilling cull table Oct 17 22:29:57 nyx cachefilesd[11414]: Scan complete Oct 17 22:30:05 nyx cachefilesd[11414]: Daemon Terminated Oct 17 22:30:05 nyx kernel: CacheFiles: File cache on dm-2 unregistering Oct 17 22:30:05 nyx kernel: FS-Cache: Withdrawing cache "wd_gemini" All feedback wellcome. Thanks in advance. Best regards, Wolfgang Denk -- DENX Software Engineering GmbH, MD: Wolfgang Denk & Detlev Zundel HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: wd@xxxxxxx Of course there's no reason for it, it's just our policy. -- Linux-cachefs mailing list Linux-cachefs@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/linux-cachefs
