Hi ,
I have RHEL4 GA installed on my machine.
filesystems do net get umounted even
after unexporting all exported filesystems.
This happens only if client was doing io to
server.
#cat /proc/net/rpc/nfsd
rc 6 5158 3068
fh 174 0 0 0 0
io 3423168 148232768
th 16 4 6.168 2.532 5.040 1.934 3.607 0.171
0.028 0.071 0.005 0.006
ra 32 0 0 0 0 0 0 0 0 0 0 283
net 8236 8194 30 30
rpc 8232 0 0 0 0
proc2 18 31 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
proc3 22 30 1082 0 741 413 0 283 4567 288 240
0 0 42 26 1 0 0 181 10 2 0 295
proc4 2 0 0
After huge number of retries (30-40) , umount
succeeds.
From above output , nfs server does not
seemsto be much busy.
Umount is successful immediately after
killing nfsd
Using iostat command , i ca nsee that io is
going on disk and hence is busy but why does
it take such a long time to complete the io,
though nfs servers are not busy.
Systems on which nfs is running are not at
all heavily loaded.
This problem is only on RedHat(GA,update1)
and not on suSE 9
thanks,
--kiran
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