Hardware Sizing

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Hi Team,

This is my first post to this community.

I have some basic queries to start with CEPH software...I found that http://www.supermicro.com.tw/products/system/2U/6027/SSG-6027R-E1R12T.cfm is being recommend as a start of storage server.

As my target is to start with 12 TB solution (production environment, high performance) having three copies of my data. I am confused, that

1.   How many servers will be required i.e OSD, MON, MDS (above mentioned chassis).

2.   Should I separate role to each server? or single server will be good enough?

3.     How many raid-cards in each server will be required?
3.1   I mean separate for read and write can be configured or not? I need best performance and throughput.

Can anyone suggest? Thanks in advance...

B~Mork
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