Thanks for the feedback! El lun., 2 mar. 2020 a las 5:21, Ronny Aasen (<ronny+pve-u...@aasen.cx>) escribió:
> On 28.02.2020 15:25, Leandro Roggerone wrote: > > Dear Eneko: > > When you talk about redundacy and availability, do you want... > > - HA? (automatic restart of VMs in the other node in case one server > fails) > > - Be able to move VMs from one server to the other "fast" (without > > copying the disks)? > > Yes , this is what I want. > > So regarding my original layout from my 5.5Tb storage: > > Im using 1T for LVM , 1TB for LVM-thin and 3.5 TB unassigned space, is > it > > ok to use this unassigned space for a ceph ? > > Can I set it later ? with server on production ? > > > > Other: > > Using an NFS system, means to have an external server running a file > sistem? > > So you should have at least two servers for the cluster and one for the > > file system? > > It seems to me that using ceph has a better redundancy plan an it is > easier > > to deploy since I only need two servers. (am i right?). > > Thanks! > > > > El vie., 28 feb. 2020 a las 11:06, Eneko Lacunza (<elacu...@binovo.es>) > > escribió: > > > >> Hola Leandro, > >> > > > for NFS you have just moved your SPOF from proxmox to NFS. so unless you > have a HA NFS solution like a SAN with controller failover i would not > think about NFS. > > for ceph you need 4 server to a have a proper fault tolerant HA system > you have 3 copies of data. and a node as a failuredomain. you want the > disk layout to be fairly identical on the servers. > > you can in theory run ceph on 3 nodes, but you will have a degraded > cluster when you loose a node. and basically neuter the best features of > ceph. so use 4 or more nodes. ceph really shines when you get to 8-10 > nodes. also most defaults assume a 8 node cluster, so you may need to > tweak some warning levels when you want to run with fewer. > > Also proxmox HA requires quorum. so proxmox also need 3 or more nodes. > if you only have 2 nodes you can not do a reliable HA solution. But you > can do a zfs replication system, where the running vm is replicated to > the other server periodically. and you can start that backup vm when the > main one dies. > > Good luck > Ronny Aasen > > > _______________________________________________ > pve-user mailing list > pve-user@pve.proxmox.com > https://pve.proxmox.com/cgi-bin/mailman/listinfo/pve-user > _______________________________________________ pve-user mailing list pve-user@pve.proxmox.com https://pve.proxmox.com/cgi-bin/mailman/listinfo/pve-user