title: Ceph Lumonius Bluestore Performance Issue and Trim? Discard?
body: <p>Good morning..</p>
  
  <p>I'm testing the Ceph Luminous version.</p>
  
  <p>The first RBD Good performance at 1TB SSD X 9OSD (3OSD_Node), 1250MB / s (10G Network)</p>
  
  <p>As well.</p>
  
  <p>However, after filling the entire storage capacity(100%) of the Cluster, the performance drops to 200MB / s at 20% after the RBD deletion. What is the problem?</p>
  
  <p>There was no such problem when tested with FileStore (XFS) as above.</p>
  
  <p>TRIM? Discard?</p>
  
  <p>I am currently operating Jewel, Kraken.</p>