On 07/07/2016 04:31 PM, Fran Barrera wrote:
Hello, Yes I've added two monitors but the error persist. In the error I see only the IP of the first mon, why not appears the second?
The description you offered on the initial email appears to state the following:
- You initially had one monitor (let's call it A) - You added a second monitor (let's call it B) - Everything works while A and B are running - Nothing works if you stop A Did I understand your problem correctly? -Joao
I had only one monitors before and running good because I have installed AIO. Thanks. 2016-07-07 17:22 GMT+02:00 Joao Eduardo Luis <joao@xxxxxxx <mailto:joao@xxxxxxx>>: On 07/07/2016 04:17 PM, Fran Barrera wrote: Hi all, I have a cluster setup AIO with only one monitor and now I've created another monitor in other server following this doc http://docs.ceph.com/docs/master/rados/operations/add-or-rm-mons/ but my problem is if I stop the AIO monitor, the cluster stop working. It seems like the ceph is not updated with the new mon or something In the doc you quoted, one can read: "Due to the nature of Paxos, Ceph requires a majority of monitors running to establish a quorum (thus establishing consensus). [...] For instance, on a 2 monitor deployment, no failures can be tolerated in order to maintain a quorum; with 3 monitors, one failure can be tolerated; [...]" And in a box beneath, you also see "Note: A majority of monitors in your cluster must be able to reach each other in order to establish a quorum." So, say you have 2 monitors and you need a majority of them to be up, running, and able to communicate with each other in order to form quorum. What's a majority of 2? How many failures can you tolerate? -Joao _______________________________________________ ceph-users mailing list ceph-users@xxxxxxxxxxxxxx <mailto:ceph-users@xxxxxxxxxxxxxx> http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
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