On Thursday, July 28, 2022 3:45:30 PM EDT Vladimir Brik wrote: > count_per_host worked! > > I create a ticket. Good to hear. Thanks! > > > Regardless of whether this is a good idea or not the > > option is a > > > generic one and should be handled gracefully. :-) > > Do you mean running multiple MDSes on a single host may not > be a good idea? > Right, I'm not an expert in this area, but the issue is that running multiple MDS for the same file system won't give any redundancy if that node fails. If you run two MDS services, and they're on different hosts the standby MDS on the other node can take over. If you use this option there's also the chance that the services may want to bind to the same port. I don't know if that the case for the MDS. > > Vlad > > On 7/28/22 14:11, John Mulligan wrote: > > On Thursday, July 28, 2022 2:14:57 PM EDT Vladimir Brik wrote: > >> Hello > >> > >> I tried to run multiple MDSes per host using this yaml (per > >> https://docs.ceph.com/en/quincy/cephadm/services/index.html#co-location-o > >> f-d aemons): > >> > >> service_type: mds > >> service_id: default > >> service_name: mds.default > >> > >> placement: > >> count-per-host: 2 > >> label: mds > >> > >> But got: Error EINVAL: PlacementSpec: __init__() got an > >> unexpected keyword argument 'count-per-host' > > > > Please try 'count_per_host' if you haven't already. > > > >> Is this just not supported yet or is there another way to > >> get multiple MDSes on the same host? > > > > I was curious about this and saw parts of the codebase and the docs refer > > to this field as "count-per-host" but I couldn't find any example yaml > > that uses this only 'count_per_host'. > > > > Even if this suggestion works, please also file a tracker issue on ceph > > orch for this. We should either fix the docs or have a better error > > message or both. Regardless of whether this is a good idea or not the > > option is a generic one and should be handled gracefully. :-) > > > >> Vlad > >> _______________________________________________ > >> ceph-users mailing list -- ceph-users@xxxxxxx > >> To unsubscribe send an email to ceph-users-leave@xxxxxxx > > _______________________________________________ > ceph-users mailing list -- ceph-users@xxxxxxx > To unsubscribe send an email to ceph-users-leave@xxxxxxx _______________________________________________ ceph-users mailing list -- ceph-users@xxxxxxx To unsubscribe send an email to ceph-users-leave@xxxxxxx
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