title: Ceph: How to place a pool on specific OSD?
body: <p>I have a Ceph cluster of 66 OSD with a <code>data_pool</code> and a <code>metadata_pool</code>.</p>
  
  <p>I would like to place the <code>metadata_pool</code> on 3 specific OSD which are having SSDs, since all other 63 OSD having older disks.</p>
  
  <p>How can I force Ceph to place the <code>metadata_pool</code> on specific OSD?</p>
  
  <p>Thanks by advance.</p>