The Reports Manager fetches the fsimage from the NameNode at regular intervals. It reads the fsimage and creates a Lucene index for it. To improve the indexing performance, Cloudera recommends provisioning a host as powerful as possible and dedicating an SSD disk to the Reports Manager.
|3-4 times the size of the fsimage.
|1 dedicated disk that is at least 20 times the size of the fsimage. Cloudera strongly recommends using SSD disks.