I'm starting to get a small Ceph cluster running. I'm to the point where
I've created a pool, and stored some test data in it, but I'm having
trouble configuring the level of replication that I want.
The goal is to have two OSD host nodes, each with 20 OSDs. The target
replication will be:
osd_pool_default_size = 4
osd_pool_default_min_size = 2
That is, I want two copies on each host, allowing for OSD failures or
host failures without data loss.
How to best achieve this replication? Is this strictly a CRUSH map rule,
or can it be done with the cluster conf? Pointers or examples would be
greatly appreciated.
Thanks!
--
Chris
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