[ClusterLabs] Antw: Re: Antw: Re: DLM fencing

[Ulrich Windl]

>>> Digimer <lists at alteeve.ca> schrieb am 10.02.2016 um 17:32 in Nachricht
<56BB6637.6090802 at alteeve.ca>:
> On 10/02/16 02:40 AM, Ulrich Windl wrote:

[...]
>>> If fencing fails or is not configured, DLM never unblocks and anything
>>> using it is left hung (by design, better to hang than risk corruption).
>>>
>>> One of many reasons why fencing is critical.
>> 
>> I'm not deeply in DLM, but it seems to me DLM can run standalone, or in the
>> cluster infrastructure (we only use it inside the cluster). When running
>> standalone, it makes sense that DLM has ist own fencing, but when running
>> inside the cluster infrastructure, I'd expect tha tthe cluster's fencing
>> mechanisms are used (maybe just because if the better logging of reasons).
> 
> To be clear; DLM does NOT have it's own fencing. It relies on the
> cluster's fencing.

OK, is this true for cLVM and O2CB as well? I always felt some of those is doing a fencing themselves as soon as they fail to communicate with DLM. So the first guess was it's DLM...

> 
> -- 
> Digimer
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