Den mån 29 nov. 2021 kl 13:14 skrev Lluis Arasanz i Nonell - Adam <lluis.arasanz@xxxxxxx>: > I don't trust the public network and afraid of if mons goes down due to this problem? So to be more secure and faster I need to understand the reason; 3- Why Mon,Mds,Mgr >should be > on public network? "Public" as far as Ceph goes is "where ceph clients like RGW, MDS and RBD mounting machines" can reach them. It has nothing to do with routable IPs or anything, or having it on the outside of a firewall or similar ideas that also use the word "public network". It is only used as the opposite of the "cluster network" which is strictly for OSD<->OSD traffic (if you use a cluster network, one doesn't have to use two separate networks, and in the one-network case, it is the public one that gets used for all traffic). The idea to separate OSD<->OSD traffic probably comes from the fact that replication means data gets multiplied over the network, so if a client writes 1G data to a pool with replication=3, then two more copies of that 1G needs to be sent, and if you do that on the "public" network, you might starve it with replication (or repair/backfill) traffic. Many run with only one network, using as fast a network as you can afford, but if two separate networks at moderate speed is cheaper than one super fast, it might be worth considering, otherwise just scale the one single network to your needs. -- May the most significant bit of your life be positive. _______________________________________________ ceph-users mailing list -- ceph-users@xxxxxxx To unsubscribe send an email to ceph-users-leave@xxxxxxx
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