[ClusterLabs] DLM in the cluster can tolerate more than one node failure at the same time?

christine caulfield ccaulfie at redhat.com
Wed Oct 23 03:09:27 EDT 2019

On 22/10/2019 07:15, Gang He wrote:
> Hi List,
> I remember that master node has the full copy for one DLM lock resource and the other nodes have their own lock status,
> then if one node is failed(or fenced), the DLM lock status can be recovered from the remained node quickly.
> My question is,
> if there are more than one node which are failed at the same time, the DLM lock service for the remained nodes in the cluster can still continue to work after recovery?

Yes. The local DLM keeps a copy of its own locks and the remaining DLM 
nodes will collaborate to re-master all of the locks that they know 
about.  The number of nodes that leave at one time has no impact on this.


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