We have a small cluster, 3mons, each which also have 6 4tb osds, and a 20gig link to the cluster (2x10gig lacp to a stacked pair of switches). well have at least replica pool (size=3) and one erasure coded pool. current plan is to have journals coexist with osds as that seems to the be safest and most economical.
what levels of striping would you recommend for this size cluster? any other optimization conciderations? looking for a starting point to work from. also, any recommendations for testing / benchmarking these configurations? so far, looking at https://www.sebastien-han.fr/blog/2012/08/26/ceph-benchmarks/ bsd rebuilding itself, and maybe phoronix.
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