32GB for a dedicated node that only runs mon / mgr daemons; no OSDs. I’ve experienced a cluster that grew over time such that 32GB was enough to run steady-state, but as OSDs and PGs were added to the cluster it was no longer enough to *boot* the daemons and I had to do emergency upgrades to 64 or 128GB. That was around a thousand OSDs.
If you’re colocating the mon / mgr daemons on your OSD nodes, I would suggest reserving that much RAM for those daemons, plus the sum of your osd memory targets. I suggest provisioning 2x the sum of osd memory targets to handle spikes. > Hallo everybody, > > the official documentation recommends for the monitor nodes 32GB for a > small clusters. Is that per node? > Like i would need 3 nodes with 32GB RAM each in addition to the OSD nodes? > > my cluster will consist of 3 replicated OSD nodes (12 OSD each), how can > i calculate the required amount of memory for monitor nodes ? > > Best regards, > Ali > > _______________________________________________ > ceph-users mailing list -- ceph-users@ceph.io > To unsubscribe send an email to ceph-users-le...@ceph.io _______________________________________________ ceph-users mailing list -- ceph-users@ceph.io To unsubscribe send an email to ceph-users-le...@ceph.io
