hi,


I'm using NFS and I have the following problem.
After ~100 days, the client and server lose connection, but the client doesn't know about this, it gives no error. The problem is that the changes on the server side aren't visible on the client side.

The nfs options are: "noatime, nolock, hard, udp, notcp, nosuid, nodev, rsize=8192, wsize=8192, actimeo=60"

The kernel version is: 2.6.16.27 built with 250 Hz.

Is this an already corrected issue in a kernel version? Or are my options wrong?


Thanks

When using NFS over udp there's no state information held about the server, so it sounds like the caching is screwed up somehow. You've set caching to be 60 seconds for all queries (actimeo), you could try removing this option and letting the defaults kick in. For example acregmin is only 3 seconds, so you'd see updated info after 3 seconds instead of the 60 you're configuring.

Not sure what you mean by "lose the connection" as udp is connectionless. TCP is more reliable and sends regular pings to ensure the conenction is open, but is more tricky if the physical medium is unreliable (the problem UDP gets around).

May be worth removing actimeo first and if that doesn't work, try TCP instead of UDP?

My 2c