Hi all,
I'm trying to find performance penalty with OSD HDD when using WAL/DB in
faster device (SSD/NVMe) vs WAL/DB in same device (HDD) for different
workload (RBD, RGW with index bucket in SSD pool, and CephFS with
metadata in SSD pool). I want to know if giving up disk slot for WAL/DB
device is worth vs adding more OSD.
Unfortunately I cannot find the benchmark for these kind workload. Has
anyone ever done this benchmark?
Thank you.
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