CODEWITHSUNDEEP
nfsgetattr
d9liang
d9liang

Reputation: 11

Too many getattr requests for file info when using nfs

I'm sharing a folder using nfs on a Linux system. It's very slow, and I found that there are many getattr requests.

After I mount my shared nfs folder on another machine, I'm trying to copy the files out. It's very slow. What I found via tcpdump is lots of getattr calls happening. Most of the requests are on the same file, which I don't understand either.

This is the mount command I'm using:

mount -t nfs -o rw,bg,hard,rsize=1048576,wsize=1048576,vers=3,nointr,timeo=600,actimeo=0,nolock,tcp

content of /etc/exportfs:
/dept/nfs *(no_subtree_check,rw,async)

What is the possible reason why there are so many getattr calls? Is there any configuration problem?

Upvotes: 1

Views: 4613

Answers (1)

user1715122
user1715122

Reputation: 967

It's because of the mount option: actimeo=0. This disables attribute caching on the client, which will send getattr requests to the server.

Upvotes: 1

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