On February 6, 2020 7:35:53 PM GMT+02:00, Eric Robinson <eric.robin...@psmnv.com> wrote: >Hi Nikolov -- > >> Defaults are 1s token, 1.2s consensus which is too small. >> In Suse, token is 10s, while consensus is 1.2 * token -> 12s. >> With these settings, cluster will not react for 22s. >> >> I think it's a good start for your cluster . >> Don't forget to put the cluster in maintenance (pcs property set >> maintenance-mode=true) before restarting the stack , or even better >- get >> some downtime. >> >> You can use the following article to run a simulation before removing >the >> maintenance: >> https://www.suse.com/support/kb/doc/?id=7022764 >> > > >Thanks for the suggestions. Any thoughts on timeouts for DRBD? > >--Eric > >Disclaimer : This email and any files transmitted with it are >confidential and intended solely for intended recipients. If you are >not the named addressee you should not disseminate, distribute, copy or >alter this email. Any views or opinions presented in this email are >solely those of the author and might not represent those of Physician >Select Management. Warning: Although Physician Select Management has >taken reasonable precautions to ensure no viruses are present in this >email, the company cannot accept responsibility for any loss or damage >arising from the use of this email or attachments.
Hi Eric, The timeouts can be treated as 'how much time to wait before taking any action'. The workload is not very important (HANA is something different). You can try with 10s (token) , 12s (consensus) and if needed you can adjust. Warning: Use a 3 node cluster or at least 2 drbd nodes + qdisk. The 2 node cluster is vulnerable to split brain, especially when one of the nodes is syncing (for example after a patching) and the source is fenced/lost/disconnected. It's very hard to extract data from a semi-synced drbd. Also, if you need guidance for the SELINUX, I can point you to my guide in the centos forum. Best Regards, Strahil Nikolov _______________________________________________ Manage your subscription: https://lists.clusterlabs.org/mailman/listinfo/users ClusterLabs home: https://www.clusterlabs.org/
