Why NFS hang when copying files of 6MB?

Alvin Oga alvin at Mail.Linux-Consulting.com
Wed Oct 8 19:28:37 EDT 2003


On Wed, 8 Oct 2003, Joe Landman wrote:

> On Wed, 2003-10-08 at 18:17, D. Scott wrote:
> > Hi
> > 
> > On diskless cluster why does NFS hang when doing 'cp' of 6MB between nodes?
> 
> Lots of possibilities, though I am not sure you have supplied enough
> information to hazard a guess (unless someone ran into this before and
> already knows the answer).
> 
> An operation on an NFS mounted file system can hang when:
> 
> 1) the nfs server becomes unresponsive (crash, overload, file system
> full, ...)

not enough memory, too much swap spce

> 2) the client becomes unresponsive ...
> 3) the network becomes unresponsive ...
> ...

- bad hub, bad switch, bad cables
- bad nic cards, bad motherboard, 
- bad kernel, bad drivers
- bad dhcp config, waiting for machines that went offline

c ya
alvin

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