[Linux-cluster] RHCS TestCluster with ScientificLinux 5.2

Rainer Schwierz R.Schwierz at physik.tu-dresden.de
Mon Sep 21 15:04:25 UTC 2009


Hello Lon,

only to explain, if I mount the clients with "nolock" the error messages 
of course go away, but I do not see a real reason to mount nfs 
filesystems with nolock, because the clients and servers kernels are all 
  2.6.18-128.1.10.el5 ...

Cheers, Rainer


Rainer Schwierz wrote:
> Hello Lon,
> 
> could you please go a little bit more in detail?.
> Each NFS filesystem has been exported only once, that means e.g. when I 
> have activated service_nfs_home, service_nfs_home_fast was not active.
> In all the tests IPtables on both servers has been stopped and all TCP 
> and UDP traffic on the clients to and from the server's real IP and the 
> servers service IPs have been accepted. I also see no significant 
> difference to the document
> "The Red Hat Cluster Suite NFS Cookbook" by Bob Peterson.
> 
> Thanks in advance & Cheers, Rainer
> 
> Lon Hohberger wrote:
>> On Thu, 2009-09-17 at 07:30 +0200, Rainer Schwierz wrote:
>>> Hello,
>>>
>>> hmm, meanwhile the fence_apc problem is fixed by a more recent 
>>> version of fence_apc.
>>>
>>> But the nfs lock problem is still open. Does it mean I definitely 
>>> should not use ScientificLinux and switch to Fedora 11 or RHEL5.4?
>>
>> When doing a multi-export of the same NFS file system on top of GFS,
>> lock recovery will not work correctly - there's no way to prevent a new
>> GFS lock from being taken after a failure but before NFS has sent the
>> lock reclaim notifications, nor is there a way for GFS to respect the
>> NFS lock reclaim grace period.
>>
>> I do not know why you would have this particular problem, though - locks
>> shouldn't randomly "not work at all" just because you take them from a
>> service IP address vs. the host's real IP.  Maybe there's some IPtables
>> firewall rule in place ?
>>
>>
>> -- Lon
>>
>> -- 
>> Linux-cluster mailing list
>> Linux-cluster at redhat.com
>> https://www.redhat.com/mailman/listinfo/linux-cluster
> 
> 


-- 
| R.Schwierz at physik.tu-dresden.de                     |
| Rainer  Schwierz, Inst. f. Kern- und Teilchenphysik |
| TU Dresden,       D-01062 Dresden                   |
| Tel. ++49 351 463 32957    FAX ++49 351 463 37292   |
| http://iktp.tu-dresden.de/~schwierz/                |




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