Re: [ClusterLabs] Speed up the resource moves in the case of a node hard shutdown

On 02/13/2018 11:46 AM, Maxim wrote: > 12.02.2018 19:31, Digimer пишет: >> Without fencing, all bets are  off. Please enable it and see if the > > issue remains > Seems, i know [in theory] about the fencing ability and its importance > (although I've never configured it so far). > But i don't

[ClusterLabs] Speed up the resource moves in the case of a node hard shutdown

13.02.2018 14:03, Klaus Wenninger пишет: - fencing helps you turning the 'maybe the node is down - it doesn't > respond within x milli-seconds' into certainty that your node is dead > and won't interfere with the rest of the cluster > > Regards, Klaus It is clear. But will it force pacemaker

[ClusterLabs] Speed up the resource moves in the case of a node hard shutdown

12.02.2018 18:46, Klaus Wenninger пишет: > Maybe a few notes on the other way ;-) In general it is not easy to > have a reliable answer to the question if the other node is down > within just let's say 100ms. Think of network-hickups, scheduling > issues and alike ... But if you are willing to

Re: [ClusterLabs] Speed up the resource moves in the case of a node hard shutdown

On 02/13/2018 01:28 PM, Maxim wrote: > 13.02.2018 14:03, Klaus Wenninger пишет: >> - fencing helps you turning the  'maybe the node is down - it doesn't > > respond within x milli-seconds' into certainty that your node is dead > > and won't interfere with the rest of the cluster > > > > Regards,

[ClusterLabs] Speed up the resource moves in the case of a node hard shutdown

12.02.2018 19:31, Digimer пишет: Without fencing, all bets are off. Please enable it and see if the > issue remains Seems, i know [in theory] about the fencing ability and its importance (although I've never configured it so far). But i don't undestand how it would help in the situtions of

Re: [ClusterLabs] Speed up the resource moves in the case of a node hard shutdown

On 2018-02-13 05:46 AM, Maxim wrote: > 12.02.2018 19:31, Digimer пишет: >> Without fencing, all bets are  off. Please enable it and see if the >> issue remains > Seems, i know [in theory] about the fencing ability and its importance > (although I've never configured it so far). > But i don't

Re: [ClusterLabs] Speed up the resource moves in the case of a node hard shutdown

On Tue, 2018-02-13 at 13:46 +0300, Maxim wrote: > 12.02.2018 19:31, Digimer пишет: > >  > should be using the cman pluging with corosync 1. May I ask why > you >  > don't use EL7 if you want such a recent stack? > For historical reasons. Let's say so. I've another software that > built  > for RHEL

[ClusterLabs] Speed up the resource moves in the case of a node hard shutdown

13.02.2018 16:41, Klaus Wenninger пишет: Let's put that differently. With fencing you can make the > loss-detection more aggressive and thus more prone to false-positives > without risking a split-brain situation. (Actually without fencing > you can never be really sure if the other side is

[ClusterLabs] Speed up the resource moves in the case of a node hard shutdown

13.02.2018 16:41, Klaus Wenninger пишет: Let's put that differently. With fencing you can make the > loss-detection more aggressive and thus more prone to false-positives > without risking a split-brain situation. (Actually without fencing > you can never be really sure if the other side is

Re: [ClusterLabs] Does CMAN Still Not Support Multipe CoroSync Rings?

Thanks for the suggestion everyone. I'll give that a try. > -Original Message- > From: Jan Friesse [mailto:jfrie...@redhat.com] > Sent: Monday, February 12, 2018 8:49 AM > To: Cluster Labs - All topics related to open-source clustering welcomed > ; Eric Robinson