Hi, I've been developing a new array type of erasure code.
I'll be glad if you can send me few pointers for the two following items: (1) Required CRUSH map for Array code, e.g. RAID-DP or MSR erasure code. It is different than normal RS(n, k) or LRC code. For example, for RAID-DP or RDP (n, k) erasure code, the codeword has k*(k+m) blocks. Question is how to place these blocks in n device mapped as OSDs? Could you Pl. suggests... (2) How to measure the recovery time of a failed OSD in cluster. Is there any script available that will perform it and generate the final result? Thanks, Syed Abid Hussain NetApp India
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