On 02/20/2014 10:39 AM, Pavel Karneliuk wrote: > Hello linux-nfs members, > > I am looking for some tool for monitoring all incoming traffic on the > wire and collecting NFSv3 operations over TCP transport protocol in > 1G-10G networks. > > Could you advise me some fast and reliable utility? > > I have tried NFSwatch tool, but its results are not reliable. > At first, I mount NFSv3 directory with TCP transport protocol and wsize=512k > > sudo mount -v -t nfs 10.6.136.187:/share /mnt/nfs-fedora/ -o > rw,vers=3.0,tcp,wsize=524288 > > then I write 10Mb file to NFS server: > > sudo dd if=/dev/zero of=/mnt/nfs-fedora/zero.data bs=1M count=10 > > I expect to see 20 WRITE operations (10Mb / 512Kb == 20). > The nfsstat (nfsstat --nfs -3 -Z) shows exactly 20 WRITE operations, > because it takes statistic from the kernel. > > When I try to get the same result with NFSwatch by (sudo nfswatch -all > -procs3 -t 20) > I get unreproducible results with 1 or 2 registered WRITE operations. > NFSwatch works well on NFSv3 over UDP, but loses almost all READ/WRITE > operations in case of TCP protocol. > I have checked its source code and found that NFSwatch doesn't > performs reassembling TCP streams between NFS server and NFS client. > It just looks at TCP segment and expects headers of RPC/NFSv3 > operations exactly after TCP header. > > The tcpdump works similarly. Wireshark(and Tshark) is too slow for > live 1G-10G NFSv3/TCP traffic capturing and filtration. > > > Would you suggest some alternative utils, solutions or workarounds? You can try mountstats(8) or nfsiostat(8). Both of them manipulate data collected in /proc/self/mountstats steved. -- To unsubscribe from this list: send the line "unsubscribe linux-nfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
