tru64: Errors writing large files via NFS

[godhelp]

Managers,


We have a strange problem (aren't they all?), where we are unable to copy files larger than a certain size to a NFS server. This server exports a filesystem (/archive) to a number of other Tru64 boxes. The problem of being unable to write large files to this filesystem shows up on all the client systems, although the definition of "too large" varies. Some of the clients are on the same network as the server, and access it through a lag interface. The other clients are in another data centre and connect through
a WAN link via a single (non-lag) interface. Since there are quite distinct network paths involved, I'm pretty sure we're not seeing a network problem.

We are pretty sure that it is it an NFS problem, and not the filesystem nor any other network later, since there are no problems with using 'rcp' to copy files onto this server. And yet the same file, copied from the same
client over the same network connection, to the same location, will fail to copy successfully if we use 'cp' to copy it to an NFS mount.

any inputs..

 

[funkyd]

How large are these files, and which NFS version are you using?

- Funky D

 

[godhelp]

nfs version is as follows,
rpcinfo -p|grep -i nfs
100003 2 udp 2049 nfs
100003 2 tcp 2049 nfs
100003 3 udp 2049 nfs
100003 3 tcp 2049 nfs

and file size is more than 5mb.

 

[funkyd]

5 MB is not a large file. Large files nowadays are on the order of GB.

Since you indicate it is not a consistent file size that causes errors. It's not an NFS limit (which would be 2 or 4 GB anyway).

What error message are you getting during the copy?

- Funky D

 

[godhelp]

The file size is more than 20mb and the system is "HUNG" after some time. so I have killed or press CTRLC to release/abort the process.

 

[godhelp]

Hi gurus

any suggestions for this problem.

thx

 

[funkyd]

Got me there. I would strongly suspect a network issue, but you say that rcp is working.

Next step would be monitoring the RPC port (135) for traffic.

 

[godhelp]

is there way to Specify the protocol for client server communication.

or let me know how do I monitor RPC port, normaly we used netstat * for monitoring services and soon.

thanks in advance.