I think one limitation would be the 375GB since bluestore needs a larger
amount of space than filestore did.

On Mon, Feb 4, 2019 at 10:20 AM Florian Engelmann <
florian.engelm...@everyware.ch> wrote:

> Hi,
>
> we have built a 6 Node NVMe only Ceph Cluster with 4x Intel DC P4510 8TB
> each and one Intel DC P4800X 375GB Optane each. Up to 10x P4510 can be
> installed in each node.
> WAL and RocksDBs for all P4510 should be stored on the Optane (approx.
> 30GB per RocksDB incl. WAL).
> Internally, discussions arose whether the Optane would become a
> bottleneck from a certain number of P4510 on.
> For us, the lowest possible latency is very important. Therefore the
> Optane NVMes were bought. In view of the good performance of the P4510,
> the question arises whether the Optanes still have a noticeable effect
> or whether they are actually just SPOFs?
>
>
> All the best,
> Florian
> _______________________________________________
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>
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