NFS Locking Issue

[Michael Collette]

Garance A Drosihn wrote:
> At 9:13 PM -0400 7/1/06, Francisco Reyes wrote:
>> John Hay writes:
>>
>>> I only started to see the lockd problems when upgrading
>>> the server side to FreeBSD 6.x and later. I had various
>>> FreeBSD clients, between 4.x and 7-current and the lockd
>>> problem only showed up when upgrading the server from
>>> 5.x to 6.x.
>>
>> It confirms the same we are experiencing.. constant
>> freezing/locking issues.  I guess no more 6.X for us.. for
>> the foreseable future..
> 
> I don't know if this will be of any help to anyone,
> but...
> 
> I recently moved a network-based service from a 4.x machine
> to a 6.x machine.  Despite some testing in advance of the
> switch, many people had problems with the service.  I booted
> to a somewhat out-of-date snapshot of 5.x on the same box.
> I still had problems, but it didn't seem as bad, so I stuck
> with the 5.x system.  Some problems turned out to be bugs
> in the service itself, and were eventually found and fixed.
> 
> However, one set of problems on that out-of-date snapshot
> of 5.x were solved by adding:
> 
> net.inet.tcp.rfc1323=0
> 
> to /etc/sysctl.conf.  The guy who suggested that said it
> avoided a bug which was fixed in later versions of either
> 5.x or 6.x, I forget which.  Of interest is that the bug
> was such that some people connecting to the service were
> never bothered by the bug, while other people could not use
> the service at all until I turned off tcp.rfc1323 .
> 
> I have a test version of the same service running on a
> different FreeBSD/i386 box, and that box is now updated
> to freebsd-stable as of June 10th.  Lo and behold, someone
> connecting to that test box reported some problems.  So I
> typed in 'sysctl net.inet.tcp.rfc1323=0', and his problem
> immediately disappeared.  So, it might be that there is
> still some problem with the rfc1323 processing, or that the
> bug which had been fixed has somehow been re-introduced.
> 
> In any case, people who are experiencing problems with NFS
> might want to try that, and see if it makes any difference.
> It does strike me as odd that some people are having a *lot*
> of trouble with NFS under 6.x, while others seem to be okay
> with it.  Perhaps the difference is the network topology
> between the NFS server and the NFS clients.
> 
> Obviously, this is nothing but a guess on my part.  I am
> not a networking guru!
> 

Thanks for the try Garance, but in my setup it didn't make any 
difference.  I'll get into a bit more detail about my setup in another post.

Later on,
-- 
Michael Collette
IT Manager
TestEquity Inc
Michael.Collette at TestEquity.com