The main difference is that rados bench uses 4MB objects while your dd
test uses 4k block size
rados bench shows an average of 283 IOPS which at 4k blocksize would
be around 1.1MB so it's somewhat consistent with the dd result
Monitor your CPU usage, network latency with something like atop on
the
Hi All,
I upgraded my cluster from Hammer to Jewel and then to Luminous , changed
from filestore to bluestore backend.
on a KVM vm with 4 cpu /2 Gb RAM i have attached a 20gb rbd volume as vdc
and performed following test.
dd if=/dev/zero of=/dev/vdc bs=4k count=1000 oflag=direct
1000+0 records i
