Jérémy Garnis eek00opppp ________________________________ De: Yannis Milios <yannis.mil...@gmail.com> Envoyé: dimanche 16 décembre 2018 09:41 À: PVE User List Objet: Re: [PVE-User] (Very) basic question regarding PVE Ceph integration
That's up to you to decide, PVE supports both hyper-converged setups (where compute and storage nodes share the same hardware) and scenarios where compute/storage nodes are separate. You can choose for example to have 3 nodes in a PVE cluster, acting as compute nodes and 3 separate nodes for the Ceph cluster, acting as storage nodes. The main difference is that the costs involved in this scenario are much higher compared to the hyper-converged setup. It's also possible to manage Ceph clusters by using PVE gui (i.e use the webgui for the Ceph tasks only). Clearly in a hyper-converged setup, as the host(s) resources will be shared between the compute and storage layer, proper measures in the design and capacity planning must be taken in order to avoid downgraded performance. For example ZFS is well known to consume high amounts of RAM.In a hyper-converged setup, if improperly configured, it may consume half of host RAM, potentially leaving VMs under pressure .. Yannis On Sun, 16 Dec 2018 at 13:28, Frank Thommen <f.thom...@dkfz-heidelberg.de> wrote: > Hi, > > I understand that with the new PVE release PVE hosts (hypervisors) can > be used as Ceph servers. But it's not clear to me if (or when) that > makes sense. Do I really want to have Ceph MDS/OSD on the same hardware > as my hypervisors? Doesn't that a) accumulate multiple POFs on the same > hardware and b) occupy computing resources (CPU, RAM), that I'd rather > use for my VMs and containers? Wouldn't I rather want to have a > separate Ceph cluster? > > Or didn't I get the point of the Ceph integration? > > Cheers > Frank > _______________________________________________ > 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 _______________________________________________ pve-user mailing list pve-user@pve.proxmox.com https://pve.proxmox.com/cgi-bin/mailman/listinfo/pve-user