Hi. Looking the sources I noticed that the "rule" in CRUSH may be type "raid4".Because of this, I have a question: Is it possible to organize the 20 OSD servers in the scheme 4 * (4+1)? I.e. like a stripe from 4 of raid4 sets?
Plain "replication level = 2" is too expensive by "used space".
WBR,
Fyodor.
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