Elbandi, It looks like it's trying to use fscache (from the stats) but there's no data. Did you install, configure and enable the cachefilesd daemon? It's the user-space component of fscache. It's the only officially supported fsache backed by Ubuntu, RHEL & SUSE. I'm guessing that's your problem since I don't see any of the bellow lines in your dmesg snippet. [2049099.198234] CacheFiles: Loaded [2049099.541721] FS-Cache: Cache "mycache" added (type cachefiles) [2049099.541727] CacheFiles: File cache on md0 registered - Milosz On Mon, Jun 17, 2013 at 11:47 AM, Elso Andras <elso.andras@xxxxxxxxx> wrote: > Hi, > > >> 1) In the graphs you attached what am I looking at? My best guess is that >> it's traffic on a 10gigE card, but I can't tell from the graph since there's >> no labels. > Yes, 10G traffic on switch port. So "incoming" means server-to-switch, > "outgoing" means switch-to-server. No separated card for ceph traffic > :( > >> 2) Can you give me more info about your serving case. What application are >> you using to serve the video (http server)? Are you serving static mp4 files >> from Ceph filesystem? > lighttpd server with mp4 streaming mod > (http://h264.code-shop.com/trac/wiki/Mod-H264-Streaming-Lighttpd-Version2), > the files lives on cephfs. > there is a speed limit, controlled by mp4 mod. the bandwidth is the > video bitrate value. > > mount options: > name=test,rsize=0,rasize=131072,noshare,fsc,key=client.test > > rsize=0 and rasize=131072 is a tested, with other values there was 4x > incoming (from osd) traffic than outgoing (to internet) traffic. > >> 3) What's the hardware, most importantly how big is your partition that >> cachefilesd is on and what kind of disk are you hosting it on (rotating, >> SSD)? > there are 5 osd servers: HP DL380 G6, 32G ram, 16 X HP sas disk (10k > rpm) with raid0. bonding two 1G interface together. > (In previous life, this hw could serve the ~2.3G traffic with raid5 > and three bonding interface) > >> 4) Statistics from fscache. Can you paste the output /proc/fs/fscache/stats >> and /proc/fs/fscache/histogram. > > FS-Cache statistics > Cookies: idx=1 dat=8001 spc=0 > Objects: alc=0 nal=0 avl=0 ded=0 > ChkAux : non=0 ok=0 upd=0 obs=0 > Pages : mrk=0 unc=0 > Acquire: n=8002 nul=0 noc=0 ok=8002 nbf=0 oom=0 > Lookups: n=0 neg=0 pos=0 crt=0 tmo=0 > Invals : n=0 run=0 > Updates: n=0 nul=0 run=0 > Relinqs: n=2265 nul=0 wcr=0 rtr=0 > AttrChg: n=0 ok=0 nbf=0 oom=0 run=0 > Allocs : n=0 ok=0 wt=0 nbf=0 int=0 > Allocs : ops=0 owt=0 abt=0 > Retrvls: n=2983745 ok=0 wt=0 nod=0 nbf=2983745 int=0 oom=0 > Retrvls: ops=0 owt=0 abt=0 > Stores : n=0 ok=0 agn=0 nbf=0 oom=0 > Stores : ops=0 run=0 pgs=0 rxd=0 olm=0 > VmScan : nos=0 gon=0 bsy=0 can=0 wt=0 > Ops : pend=0 run=0 enq=0 can=0 rej=0 > Ops : dfr=0 rel=0 gc=0 > CacheOp: alo=0 luo=0 luc=0 gro=0 > CacheOp: inv=0 upo=0 dro=0 pto=0 atc=0 syn=0 > CacheOp: rap=0 ras=0 alp=0 als=0 wrp=0 ucp=0 dsp=0 > > No histogram, i try to build to enable this. > >> 5) dmesg lines for ceph/fscache/cachefiles like: > [ 264.186887] FS-Cache: Loaded > [ 264.223851] Key type ceph registered > [ 264.223902] libceph: loaded (mon/osd proto 15/24) > [ 264.246334] FS-Cache: Netfs 'ceph' registered for caching > [ 264.246341] ceph: loaded (mds proto 32) > [ 264.249497] libceph: client31274 fsid 1d78ebe5-f254-44ff-81c1-f641bb2036b6 > > > Elbandi -- To unsubscribe from this list: send the line "unsubscribe ceph-devel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
