Hi Harald, - then i build a 3 node osd cluster and passtrough all disks and i install the mgr daemon on them - i build 3 seperate mon server and install here the rgw? right? As other friends suggested you can use VMs for mgr, mon and rgw, they are not so IOPS intensive and they are very flexible as well, you can easily replace/displace/move/add them in the future. The fact that if you can install them on the same machine depends on your load and level of complexity, the more nodes you have the more complex infra you will have to manage. But separating them would make it more secure and easier to troubleshoot in case of disasters (God forbid!). - osd crush chooseleaf type - can i set here 3? if the hosts are in different racks? is that recomended? I don't know honestly, but I think changing choose and chooseleaf have some perquisites and specific consideration in cluster. Better to read and ask more about it. - osd pool default size - can i set here 2 ? for ex if i need to maintainance a osd and need to shutdown AFAIK default pool size below 3 is not recommended, if you want to do maintenance on some OSDs you can mark them as out and do your job. Thanks, Khodayar On Tue, Apr 21, 2020 at 12:14 AM <harald.freidhof@xxxxxxxxx> wrote: > ok thx for the answers > > we will connect later nearly 20 kvm hosts on the ceph cluster > > - then i build a 3 node osd cluster and passtrough all disks and i install > the mgr daemon on them > - i build 3 seperate mon server and install here the rgw? right? > > a few question to the options: > - osd crush chooseleaf type - can i set here 3? if the hosts are in > different racks? is that recomended? > - osd pool default size - can i set here 2 ? for ex if i need to > maintainance a osd and need to shutdown? > > thx again in advance for you answers > hfreidhof > _______________________________________________ > 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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