Hi,

> On 21 Oct 2021, at 19:23, [email protected] wrote:
> 
> I am thinking of designing a cephfs or S3 cluster, with a target to achieve a 
> minimum of 50GB/s (write) bandwidth. For each node, I prefer 4U 36x 3.5" 
> Supermicro server with 36x 12TB 7200K RPM HDDs, 2x Intel P4610 1.6TB NVMe SSD 
> as DB/WAL, a single CPU socket with AMD 7302, and 256GB DDR4 memory. Each 
> node comes with 2x 25Gb networking in mode 4 bonded. 8+3 EC will be used. 

You should look to 16TiB HDD's, 12TiB give's you 25% lower space for date on 
same physical dimensions (units, power)
2x1.6TiB NVMe is not enough, there should be 2x3.2TiB or 2x3.8TiB NVMe's for 
RocksDB



k
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