About atime of NFS client

stormzm · 03-14-2012, 02:19 AM

Hi,I have a question about NFS.
I made a NFS share /myshare/fs0, under it there is a file test1. In the client, I mounted the NFS share. Then I used "cat test1" to access the file from client and use "stat test1" to look at the atime. Only the first time, atime is changed, after that no matter how many times I use cat or dd to access the file, atime not get changed.
I try to use atime, noac to mount, still cannot work. Why?
Is it possible to modify atime from NFS client every time?????

stormzm · 03-14-2012, 03:04 AM

Any ideas? I have a service very relied on access time. If clients reading files through NFS is unable to modify atime, My service will fail.

Reuti · 03-15-2012, 09:47 AM

The content of the file is still in the buffer of the client then. So there is no need to access the server again. If you use touch, it should change each time you issue it.

The ac/noac will set the chaching of attributes, but I’m not aware of an option to disable data caching in the NFS client.