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The RockFlag for India

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fsstat very high only on nfs client side rhel

Hi All,


I am facing one issue and dont know what it is about and why it is high.

when we do nfsstat

one parameter in it shows fsstat 96% and that too high for only one client of nfs. not on nfs server.

RHEL 5.5

sample output attached

Also please guided more about fsstat is it crtical or not and what impact fo this is?

thank you!
NFS-Client-screenshot.png
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gheist
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What makes you think it is high? How long period is covered in those statistics? 40000 requests per second would be half of 100Mbps network packet rate.

Before we proceed any further please upgrade to only supported version of RHEL 5 - 5U11
Please post mount options you use.
Also I strongly suggest that you paste text and not images, it takes lot of time to unwind them.
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ASKER

Actually its showing 97 % and giving alarm thats why I am concern a bit if its an issue or not.

From past 2 weeks its showing approx same 96%.

Yes will try to update to latest but before we say this we need some explanation why its so high and what is this all about?

parameters using given below:

*(rw,sync,all_squash,anonuid=30001,anongid=10003)
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gheist
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Hi Gheist,

Thanks for your quick reply.

agreed with you regarding that 40000 count but what will happen in case it goes upto 100% might be i sound stupid but dont know much about it.

please explain.

Below is the fstab entries:
nfs             rw,bg           0 0
nfs             rw,bg           0 0
nfs             rw,bg           0 0

Thanks
every time you list file stat() is called to read it's metadata (permissions, dates etc)

Pardon me, but please make some effort to post fstab entries, not something random.
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Do some major read/write operations and you'll see the percentage of fsstat (file system status) requests drop :-)
Hi Gheist and Don ,

I have posted fstab entries above only parameters for thos nfs entries.

nfs             rw,bg           0 0
nfs             rw,bg           0 0
nfs             rw,bg           0 0

My point is only that fsstat 96% from past 3 week - is there any impact on tthe server performance or its good to ignore because we should know if there is any impact then how to control it or tune it
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thanks your comments enough to make client understand and to ignore them :)
you can cache metadata so that it is not queried to NFS server on every request, but you must be very careful about same files updated from other systems.