Hello all.
Sorry for the beginner questions...
I am in the process of setting up a small (3 nodes, 288TB) Ceph
cluster to store some research data. It is expected that this
cluster will grow significantly in the next year, possibly to
multiple petabytes and 10s of nodes. At this time I'm expected a
relatively small number of clients, with only one or two actively
writing collected data - albeit at a high volume per day.
Currently I'm deploying on Debian 9 via ceph-ansible.
Before I put this cluster into production I have a couple
questions based on my experience to date:
Luminous, Mimic, or Nautilus? I need stability for this
deployment, so I am sticking with Debian 9 since Debian 10 is
fairly new, and I have been hesitant to go with Nautilus. Yet
Mimic seems to have had a hard road on Debian but for the efforts
at Croit.
- Statements on the Releases page are now making more sense to
me, but I would like to confirm that Nautilus is the right
choice at this time?
Bluestore DB size: My nodes currently have 8 x 12TB drives (plus
4 empty bays) and a PCIe NVMe drive. If I understand the
suggested calculation correctly, the DB size for a 12 TB Bluestore
OSD would be 480GB. If my NVMe isn't big enough to provide this
size, should I skip provisioning the DBs on the NVMe, or should I
give each OSD 1/12th of what I have available? Also, should I try
to shift budget a bit to get more NVMe as soon as I can, and redo
the OSDs when sufficient NVMe is available?
Thanks.
-Dave
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