Hi! I've got a CEPH 16.2.6 cluster, the hardware is 6 x Supermicro SSG-6029P nodes, each equipped with: 2 x Intel(R) Xeon(R) Gold 5220R CPUs 384 GB RAM 2 x boot drives 2 x 1.6 TB enterprise NVME drives (DB/WAL) 2 x 6.4 TB enterprise drives (storage tier) 9 x 9TB HDDs (storage tier) 2 x Intel XL710 NICs connected to a pair of 40/100GE switches Please help me understand the calculation / choice of the optimal EC profile for this setup. I would like the EC pool to span all 6 nodes on HDD only and have the optimal combination of resiliency and efficiency with the view that the cluster will expand. Previously when I had only 3 nodes I tested EC with: crush-device-class=hdd crush-failure-domain=host crush-root=default jerasure-per-chunk-alignment=false k=2 m=1 plugin=jerasure technique=reed_sol_van w=8 I am leaning towards using the above profile with k=4,m=2 for "production" use, but am not sure that I understand the math correctly, that this profile is optimal for my current setup, and that I'll be able to scale it properly by adding new nodes. I would very much appreciate any advice! Best regards, Zakhar _______________________________________________ ceph-users mailing list -- ceph-users@xxxxxxx To unsubscribe send an email to ceph-users-leave@xxxxxxx
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