On 28-1-2019 02:56, Will Dennis wrote:
I mean to use CephFS on this PoC; the initial use would be to back up an existing ZFS server with ~43TB data (may have to limit the backed-up data depending on how much capacity I can get out of the OSD servers) and then share out via NFS as a read-only copy, that would give me some I/O speeds on writes and reads, and allow me to test different aspects of Ceph before I go pitching it as a primary data storage technology (it will be our org's first foray into SDS, and I want it to succeed.)
No way I'd go primary production storage with this motley collection of "pre-loved" equipment :) If it all seems to work well, I think I could get a reasonable budget for new production-grade gear.
Perhaps superfluous, my 2ct anyways.
I'd carefully define the term: "all seems to work well".
I'm running several ZFS instances of equal or bigger size, that are
specifically tuned (buses, ssds, memory and ARC ) to their usage. And
they usually do perform very well.
No if you define "work well" as performance close to what you get out of
your zfs store.... be careful not to compare pears to lemons. You might
need rather beefy HW to get to the ceph-cluster performance at the same
level as your ZFS.
So you'd better define you PoC target with real expectations.
--WjW
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