Just to clarify: You can run a single master (--quorum=1) if you are looking to experiment and don't care about high availability.
You can run 3 masters (--quorum=2) if you want to remain operating with 1 machine being down (planned or unplanned). You can also operate in the face of the complete loss of 1 of the disks/machines. You can run 5 masters (--quorum=3) if you want to remain operating with 2 machines being down (planned or unplanned). You can also operate in the face of the complete loss of 2 of the disks/machines. And so on. I would recommend 3 or 5 depending on your requirements. Jie and/or myself will look to get some documentation up for this soon! On Tue, Jul 1, 2014 at 3:29 PM, Jie Yu <[email protected]> wrote: > Dick, you are right. > > - Jie > > > On Tue, Jul 1, 2014 at 3:20 PM, Dick Davies <[email protected]> > wrote: > >> I might be wrong but doesn't the new quorum setting mean >> it only makes sense to run an odd number of masters >> (a la zookeepers)? >> >> i.e. 4 masters is no more resilient than 3 (in fact less so, since >> you increase your chance of a node failure as number of nodes >> increases). >> > >
