NFS

[Chakravarthi]

Hi all,

Why ls and df commands hand when the nfs server is not responding, mostly in hard mount cases

regards
chakri

[Chakravarthi]

typo hang

[H.Merijn Brand (procura]

Because it is a *hard* mount, ls expects the server to be online, and *waits* until it is.

I strongly advice against hard NFS mounts,and use soft mounts with a low retry count instead.

[Chakravarthi]

Hi,

i wanted to know why they have to hang, internally what happens

df i can understand, it shows even the mounts, so it might not be able to get the stat of it, but why ls should hang, it just have to list the files, and it hangs even when you are running command in local file system

[Vincent Stedema]

Hi,

'ls' hangs because it tries to open the directory for reading and it can't.

Regards,

Vincent

[Jose Mosquera]

Hi,

Bcse you are requesting for something not available, more info about NFS services...

http://www.docs.hp.com/hpux/onlinedocs/B1031-90048/B1031-90048.html

Rgds.

[Ravi_8]

Hi, chakri

df hangs while hard NFS mount is failing.
but in your case ls is hanging, i feel you are trying to do ls in the filesystem that are to be hard NFS mounted.
is the ls hangs on the filesystems thar are mounted like on / file systems?

[Shannon Petry]

df and ls both hang for the same reason.
df needs to stat the file, and get info from the server.
when ls runs, it also sends a list command to the server, which returns the results. Read the man page for nfsstat

If the NFS server is not responding, any command related to the NFS mounted file system will hang. This can include a change directory, ls, df, etc...

I usually mount production machines soft and background retries which greatly reduces hang if an NFS server is down for any reason.

Regards,
Shannon