I test the performance of ceph cluster using different osd_op_num_shards and different
osd_op_num_threads_per_shard configuration. And I found that using multi-thread(with a
single shard) can get the same improvement of performance with multi-shard. However, the
document of ceph osd
that using lower shard number may have deleterious effects. I want to know what the
deleterious effects are.
Thanks for the assistance!