On Tuesday, December 16, 2025 at 08:21:43 a.m. EST, Anthony D'Atri via ceph-users <[email protected]> wrote:
> If up-front CapEx is your concern, remember that you don't have to fully > populate nodes with drives, at least not initially. I sometimes recommend > a minimum of 7 nodes so that 4+2 or 3+3 EC can be done safely. Seven nodes > half-full is better in multiple ways than 4 nodes fully populated. > > As for nodes, used Dell R640 can be had with 8 or 10 NVMe bays and lots > of cores very inexpensively these days. Will they give another (let's be > honest) > 10 years of service? Hard to say. But today's SSDs can be transplanted into > tomorrow's chassis, and when the latter is cheap, one can easily afford to lay > in a couple of spares. It's like with full-frame digital photography: a body > from 10 years ago is meh by today's standards, but that $10,000 lens for > shooting sports ball is still golden. We're in a situation where we've got nodes that we can use, so it's mostly about the drive cost and configuration. The nodes are in chassis of 4 nodes each. Would there be any problem with putting a 4+2 or 3+3 config into 8 nodes? And any problem with having 7 monitors running on Proxmox nodes that are part of the Ceph cluster but aren't running any OSDs? (Obviously we wouldn't be able to survive the loss of a chassis in this config.) Andrew _______________________________________________ ceph-users mailing list -- [email protected] To unsubscribe send an email to [email protected]
