Hi all, currently, all defined monitors are started automatically and included in the mon cluster. In a big cluster, you either need to define many monitors or risk a cluster failure, if the majority of monitors fails. Documentation recommends three monitors. In our special cluster configuration, this would mean that if accidentially two nodes with monitors fail (e.g. one in maintenance and one crashes), the whole cluster dies. What I would really like would be that I can define a monitor on each node and e.g. set "max mon = 3". Each monitor starting up can then check how many monitors are already up and go to standby, if the number has already been reached. Regular rechecking could allow another monitor to become active, if one of the previously active monitors has died. Just like "max mds" actually. A special case that gives me most headaches is the case of just two active nodes. According to documentation, the monitor problem means that one failing monitor kills the cluster whatever the number of defined monitors (1 or 2), even if we have all data safely placed on both nodes. Amon Ott -- Dr. Amon Ott m-privacy GmbH Tel: +49 30 24342334 Am Köllnischen Park 1 Fax: +49 30 24342336 10179 Berlin http://www.m-privacy.de Amtsgericht Charlottenburg, HRB 84946 Geschäftsführer: Dipl.-Kfm. Holger Maczkowsky, Roman Maczkowsky GnuPG-Key-ID: 0x2DD3A649 -- To unsubscribe from this list: send the line "unsubscribe ceph-devel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
