[Ocfs2-users] heartbeat write timeout

[Weller, Michael]

I don't know if I mentioned that to the list, elevator=deadline and rising the THRESHOLD to 14 solved my self-fencing issues.

(We'll see what happens under a possibly extreme load).

Michael.

---

Dr. Michael Weller

ITZ Informationstechnologie GmbH
Consulting/Systemengineering
Bismarckstrasse 57
D-45128 Essen

Phone Office  +49 201 24714 28
FAX   Office  +49 201 24714 33
Phone Mobile  +49 172 2178078
E-Mail        mailto:michael.weller at itz-essen.de

> -----Ursprüngliche Nachricht-----
> Von: ocfs2-users-bounces at oss.oracle.com [mailto:ocfs2-users-
> bounces at oss.oracle.com] Im Auftrag von Zunker, Christian
> Gesendet: Dienstag, 18. April 2006 15:21
> An: ocfs2-users at oss.oracle.com
> Betreff: Re: [Ocfs2-users] heartbeat write timeout
> 
> Hi,
> 
> I experienced the same problems. The elevator=deadline parameter didn't
> help. But increasing the threshold to 60 did it. I think you could
> decrease the threshold, but didn't test it. In another posting, it is said
> to take a timeout between 60 and 90 seconds. This would mean a threshold
> between 31 and 46.
> 
> I'll test this later.
> 
> Best regards,
> Christian
> 
> 
> -----Ursprüngliche Nachricht-----
> Von: ocfs2-users-bounces at oss.oracle.com [mailto:ocfs2-users-
> bounces at oss.oracle.com] Im Auftrag von Weller, Michael
> Gesendet: Sonntag, 2. April 2006 14:18
> An: Silviu Marin-Caea; ocfs2-users at oss.oracle.com
> Betreff: Re: [Ocfs2-users] heartbeat write timeout
> 
> Thx for the hints, I'll try that.
> 
> With regards to the updates, while I generally agree, I can't update the
> kernel here, because we'll loose vendor warranty in that case. I know this
> is an odd concept, but that's how it works. We'll even loose Oracle
> support because the kernel update would void HP SAN-support.
> 
> I mentioned SAN Failover, which for example does not work with current
> kernel and current (even the not so current HP checked variant) Qlogic
> driver.
> 
> Anyway, I'll try your suggestions on monday and drop the list a note if it
> worked.
> 
> Thanks,
> Michael.
> 
>  ---
> 
> Dr. Michael Weller
> 
> ITZ Informationstechnologie GmbH
> Consulting/Systemengineering
> Bismarckstrasse 57
> D-45128 Essen
> 
> Phone Office    +49 201 24714 28
> FAX   Office    +49 201 24714 33
> Phone Mobile    +49 172 2178078
> E-Mail          mailto:michael.weller at itz-essen.de
> > -----Ursprüngliche Nachricht-----
> > Von: ocfs2-users-bounces at oss.oracle.com [mailto:ocfs2-users-
> > bounces at oss.oracle.com] Im Auftrag von Silviu Marin-Caea
> > Gesendet: Sonntag, 2. April 2006 08:26
> > An: ocfs2-users at oss.oracle.com
> > Betreff: Re: [Ocfs2-users] heartbeat write timeout
> >
> > On Saturday 01 April 2006 22:36, Weller, Michael wrote:
> >
> > > we are bound to SLES9SP3 (and EXACTLY that, nothing less, not a patch
> > > more)
> >
> > Having latest updates does not hurt, on the contrary, it helps.  For
> > example,
> > the latest kernel has OCFS2 1.1.8, while the kernel from SP3 has 1.1.7.
> > There are a number of bugfixes.
> >
> > SLES updates do really have a purpose.  Apply them after testing in a
> > non-production system.
> >
> > > It locks up immediately. Definitely nothing like a 12s timeout
> expires.
> >
> > It just looks like it's immediate, actually, the 12s do expire.
> >
> > > You mention a FAQ regarding some config option which I didn't come
> > > across up to now, where can I find it?
> >
> > /boot/grub/menu.lst
> >
> > change elevator=cfq to elevator=deadline
> >
> > http://oss.oracle.com/projects/ocfs2/
> > scroll down, look at the red text
> >
> > > Which options would you recommend to fix the problem or at least make
> > > locks much less likely.
> >
> > You could also increase the timeout:
> >
> > /etc/sysconfig/o2cb
> >
> > # O2CB_HEARTBEAT_THRESHOLD: Iterations before a node is considered dead.
> > O2CB_HEARTBEAT_THRESHOLD=16
> >
> >
> > _______________________________________________
> > Ocfs2-users mailing list
> > Ocfs2-users at oss.oracle.com
> > http://oss.oracle.com/mailman/listinfo/ocfs2-users
> 
> 
> 
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