I know there is already a few threads about 2x replication but I wanted to start one
dedicated to discussion on NVMe. There are some older threads, but nothing recent that
addresses how the vendors are now pushing the idea of 2x.
We are in the process of considering Ceph to replace our Nimble setup. We will have two
completely separate clusters at two different sites that we are using rbd-mirror snapshot
replication. The plan would be to run 2x replication on each cluster. 3x is still an
option, but for obvious reasons 2x is enticing.
Both clusters will be spot on to the super micro example in the white paper below.
It seems all the big vendors feel 2x is safe with NVMe but I get the feeling this
community feels otherwise. Trying to wrap my head around were the disconnect is between
the big players and the community. I could be missing something, but even our Supermicro
contact that we worked the config out with was in agreement with 2x on NVMe.
Appreciate the input!
[
https://www.supermicro.com/white_paper/white_paper_Ceph-Ultra.pdf |
https://www.supermicro.com/white_paper/white_paper_Ceph-Ultra.pdf ]
[
https://www.redhat.com/cms/managed-files/st-micron-ceph-performance-referen…
]
[
https://www.redhat.com/cms/managed-files/st-micron-ceph-performance-referen…
|
https://www.redhat.com/cms/managed-files/st-micron-ceph-performance-referen…
]
[
https://www.samsung.com/semiconductor/global.semi/file/resource/2020/05/red…
|
https://www.samsung.com/semiconductor/global.semi/file/resource/2020/05/red…
]