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
