New cluster - configuration tips and reccomendation - NVMe

[Massimiliano Cuttini <max@xxxxxxxxxxxxx>]

Dear all,

luminous is coming and sooner we should be allowed to avoid double writing.
This means use 100% of the speed of SSD and NVMe.
Cluster made all of SSD and NVMe will not be penalized and start to make sense.

Looking forward I'm building the next pool of storage which we'll setup on next term.
We are taking in consideration a pool of 4 with the following single node configuration:

• 2x E5-2603 v4 - 6 cores - 1.70GHz
• 2x 32Gb of RAM
• 2x NVMe M2 for OS
  
• 6x NVMe U2 for OSD
• 2x 100Gib ethernet cards

We have yet not sure about which Intel and how much RAM we should put on it to avoid CPU bottleneck.
Can you help me to choose the right couple of CPU?
Did you see any issue on the configuration proposed?

Thanks,
Max

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