Re: crush choose firstn vs. indep

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> For Ceph releases up to Emperor[1], firstn is used and I'm not aware of a use
> case requiring indep. As part of the effort to implement erasure coded pools,
> firstn[2] and indep[3] were separated in two functions. The firstn method is best
> suited for replicated pools. The indep method tries to minimize the position
> changes in case an OSD becomes unavailable. 

OK. Many thanks for the detailed description.



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