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Test

fio --name=randwrite --ioengine=libaio --iodepth=1 --rw=randwrite --bs=8m --direct=0 --size=8G --numjobs=200 --runtime=600 --group_reporting --direct=1

Directories layout

getfattr -n ceph.dir.layout /mnt/ceph/
ceph.dir.layout="stripe_unit=4194304 stripe_count=1 object_size=4194304 pool=ceph_data"