On 11/07/2013 06:47, Radek Krejc(a wrote:
Hello,
I have problem with heavy load of my nfsd server. There is connected about 70
diskless machines, but in readonly mode. I catched traffic and get this:
21:00:39.715337 IP diskless-1.3297435097 > storage.nfs: 112 getattr fh
Unknown/A27801CEDE115FA30A005CD9080000007ABA42000000000000000000570CDB51
21:00:39.716229 IP storage.nfs > diskless-1.3297435097: reply ok 112
getattr REG 444 ids 0/0 sz 64944
21:00:39.716463 IP diskless-1.3297435098 > storage.nfs: 112 getattr fh
Unknown/A27801CEDE115FA30A0043DE080000007CBA42000000000000000000570CDB51
21:00:39.719112 IP storage.nfs > diskless-1.3297435098: reply ok 112
getattr REG 444 ids 0/0 sz 82800
21:00:39.719453 IP diskless-1.3297435099 > storage.nfs: 112 getattr fh
Unknown/A27801CEDE115FA30A0043DE080000007CBA42000000000000000000570CDB51
21:00:39.721636 IP storage.nfs > diskless-1.3297435099: reply ok 112
getattr REG 444 ids 0/0 sz 82800
Why is the same machine requesting chmod of the same file and is there any way
to find out name of file from this long id?
Thank you
Radek
Sorry - I don't think there's an easy answer to this but someone who
knows more about nfsd may be along soon.
However, if no better idea turns up you could try using dtrace to
monitor the underlying calls (or hack nfsd?). I have thought about doing
this myself, but it is only available in new FreeBSD releases and the
DTrace user guide (from Sun) is 60 pages long and gives me a headache. I
know Linux people do something similar using SystemTap.
Is the attribute caching on the client set correctly? Or even working (bug?)
BTW, what you're seeing isn't unusual.
Regards, Frank.
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