Why does FC6 client become unresponsive during NFS write operations?
Nick Thompson
nickthom at bigfoot.com
Mon Mar 5 16:55:25 UTC 2007
My FC6 desktop client becomes unresponsive every 15-30 seconds for 5-15
seconds during long NFS write operations. My installation is up-to-date as of
this morning. This occurs with both an FC4 NFS server and another NFS server
I have running nfs-utils. I can't see any issues in nfsstat on the client:
[root at ratbert nick]# /usr/sbin/nfsstat --nfs
Client nfs v3:
null getattr setattr lookup access readlink
0 0% 39 0% 3 0% 16 0% 30 0% 0 0%
read write create mkdir symlink mknod
0 0% 476675 99% 2 0% 0 0% 0 0% 0 0%
remove rmdir rename link readdir readdirplus
3 0% 0 0% 0 0% 0 0% 0 0% 223 0%
fsstat fsinfo pathconf commit
5 0% 10 0% 0 0% 376 0%
Client nfs v4:
null read write commit open open_conf
0 0% 0 0% 0 0% 0 0% 0 0% 0 0%
open_noat open_dgrd close setattr fsinfo renew
0 0% 0 0% 0 0% 0 0% 0 0% 0 0%
setclntid confirm lock lockt locku access
0 0% 0 0% 0 0% 0 0% 0 0% 0 0%
getattr lookup lookup_root remove rename link
0 0% 0 0% 0 0% 0 0% 0 0% 0 0%
symlink create pathconf statfs readlink readdir
0 0% 0 0% 0 0% 0 0% 0 0% 0 0%
server_caps delegreturn
0 0% 0 0%
On the server I see nothing wrong:
# cat /proc/net/snmp
Ip: Forwarding DefaultTTL InReceives InHdrErrors InAddrErrors ForwDatagrams
InUnknownProtos InDiscards InDelivers OutRequests OutDiscards OutNoRoutes
ReasmTimeout ReasmReqds ReasmOKs ReasmFails FragOKs FragFails FragCreates
Ip: 2 64 2033141 0 0 0 0 0 2033109 1264641 0 0 0 0 0 0 0 0 0
Icmp: InMsgs InErrors InDestUnreachs InTimeExcds InParmProbs InSrcQuenchs
InRedirects InEchos InEchoReps InTimestamps InTimestampReps InAddrMasks
InAddrMaskReps OutMsgs OutErrors OutDestUnreachs OutTimeExcds OutParmProbs
OutSrcQuenchs OutRedirects OutEchos OutEchoReps OutTimestamps
OutTimestampReps OutAddrMasks OutAddrMaskReps
Icmp: 5 0 5 0 0 0 0 0 0 0 0 0 0 21 0 21 0 0 0 0 0 0 0 0 0 0
Tcp: RtoAlgorithm RtoMin RtoMax MaxConn ActiveOpens PassiveOpens AttemptFails
EstabResets CurrEstab InSegs OutSegs RetransSegs InErrs OutRsts
Tcp: 1 200 120000 -1 2 205 0 0 1 2031363 1263636 2 0 0
Udp: InDatagrams NoPorts InErrors OutDatagrams
Udp: 1700 17 0 993
Any ideas what I can look at? I need to get NFS running for home directories,
but the machine using it become unusable when copying big files around.
Thanks,
Nick.
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