From: Daniel Phillips <phillips@google.com>
To: ocfs2-devel@oss.oracle.com
Subject: [Ocfs2-devel] Fencing in OCFS2
Date: Thu, 18 May 2006 12:21:29 -0700 [thread overview]
Message-ID: <446CC939.8060502@google.com> (raw)
In-Reply-To: <446CC185.9090306@oracle.com>
Zach Brown wrote:
> Sum Sha wrote:
>
>>With some experiments and going through OCFS2's quorum code, I am sure
>>that in case of serial split-brain, quorum algorithm will surely break
>>and will cause complete cluster shutdown. It will cause all the
>>subcluster nodes to panic themselves. Please correct me if I am
>>wrong...
>
> Can you provide the details that lead you to be sure of your analysis?
It seems to be the intended behavior. No node is a member of a quorum
group so all nodes should be fenced. This is correct.
What is wrong is the idea that fencing is equivalent to panicking. No!
Fencing means preventing a particular node from writing to shared storage.
The FAQ item is incorrect. How about this instead?
Q03 What is fencing?
A03 Fencing is the act of preventing a node from writing to shared
cluster storage.
Regards,
Daniel
next prev parent reply other threads:[~2006-05-18 19:21 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-05-17 14:20 [Ocfs2-devel] Fencing in OCFS2 Sum Sha
2006-05-18 14:46 ` Sum Sha
2006-05-18 18:48 ` Zach Brown
2006-05-18 19:21 ` Daniel Phillips [this message]
2006-05-19 14:40 ` Sum Sha
2006-05-20 2:00 ` Daniel Phillips
2006-05-22 7:42 ` Sum Sha
2006-05-25 21:35 ` Daniel Phillips
2006-05-26 17:23 ` Daniel Phillips
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