[Ocfs2-devel] [patch 19/25] ocfs2: o2hb: add negotiate timer

[Srinivas Eeda]

On 03/28/2016 05:41 AM, jiangyiwen wrote:
> On 2016/3/28 9:23, Junxiao Bi wrote:
>> Hi Yiwen,
>>
>> On 03/26/2016 10:54 AM, jiangyiwen wrote:
>>> Hi, Junxiao
>>> This patch may have a problem. That is journal of every nodes become
>>> abort when storage down, and then when storage up, because journal
>>> has become abort, all of operations of metadata will fail. So how to
>>> restore environment? panic or reset? how to trigger?
>> Journal aborted means io error was returned by storage, right?
>> If so, o2hb_thread should also get io error, in this case, nego process
>> will be bypassed, and nodes will be fenced at last, see "[patch 23/25]
>> ocfs2: o2hb: don't negotiate if last hb fail".
>>
>> Thanks,
>> Junxiao.
>>> Thanks,
>>> Yiwen Jiang.
>>
>> .
>>
> yes, you are right, sorry I don't see this patch before.
>
> But I understand the results of storage down should return IO error
> rather than getting hang.
that is upto the driver or storage. If they return I/O error, o2hb i/o's 
will get i/o errors and will be addressed accordingly. These changes are 
made for cases where storage is not yet responding due to head 
failovers/recovery on the storage array.

>
> Thanks,
> Yiwen Jiang.
>
>
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