[ClusterLabs] Cluster node loss detection.
lists at alteeve.ca
Fri Oct 16 12:17:43 EDT 2015
On 16/10/15 11:40 AM, Vallevand, Mark K wrote:
> Thanks. I wasn't completely aware of corosync's role in this. I see new things in the docs every time I read them.
> I looked up the corosync settings at one time and did it again:
> token loss 3000ms
> retransmits 10
> So 30s. Redid my simple testing and got detection times of 22s, 26s, and 25s using very crude methods.
> Any warnings about setting these values to something else?
> We require our customers to use an isolated, private network for cluster communications. All taken care of in our instructions and cluster configuration scripts. Network traffic will not be a factor. So, I'm thinking 1000ms and 5 retransmits as an experiment.
That is very high. I think the default is something like 236ms x 4 losses.
You do have fencing, right?
> I was pretty sure that DLM was just being informed by clustering, but I needed to ask.
> Again, thanks.
> Mark K Vallevand Mark.Vallevand at Unisys.com <mailto:Mark.Vallevand at Unisys.com>
> Never try and teach a pig to sing: it's a waste of time, and it annoys the pig.
Papers and Projects: https://alteeve.ca/w/
What if the cure for cancer is trapped in the mind of a person without
access to education?
More information about the Users