[olug] NEED to kill a process....

Jay Bendon jaybocc2 at gmail.com
Tue May 22 19:34:06 UTC 2012

Ah, something learned. thanks for the corrections :)

On Tue, May 22, 2012 at 2:12 PM, Christopher Cashell <topher-olug at zyp.org>wrote:

> On Tue, May 22, 2012 at 1:46 PM, Jay Bendon <jaybocc2 at gmail.com> wrote:
> > in the future you may want to do a soft mount of the NFS (as opposed to
> > what appears to be a hard mount in use right now).  NFS will continue to
> > try and try and try to complete its task, this includes waiting for the
> san
> > to come back or whatever. A soft mount will cause it to error out if it
> > fails.
> You generally don't use NFS (a type of Network Attached Storage (NAS)
> with a Storage Area Network (SAN).  With a SAN, you are directly
> mounting the storage as a block device using iSCSI, Fiber Channel, or
> the like.  The mechanics are somewhat different from NFS and NAS.
> As for the soft mount, generally it is recommended pretty strongly
> that you avoid soft mounting an NFS share unless you really know what
> you're doing.  In bad cases, it can result in data corruption (hard
> failure or hang is usually preferable to (possibly silent) data
> corruption).  Generally, the recommendation is to do a hard mount and
> use the 'intr' option to allow signals to interrupt file operations in
> the event of a hang.  For maximum reliability, I would also urge using
> NFS v3 or v4, use TCP, and use a modern Linux install with a
> relatively recent kernel.
> Note: On modern kernels (2.6.25+), the kernel will allow SIGKILL to
> interrupt NFS file operations regardless of this setting, and 'intr'
> is considered deprecated.
> > --Jay
> --
> Christopher
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