[HDFS-8811] Move BlockStoragePolicy name's constants from HdfsServerConstants.java to HdfsConstants.java

• Type: Improvement
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 2.8.0, 3.0.0-alpha1
• Hadoop Flags: Reviewed
• Assignee: Vinayakumar B
• Reporter: Vinayakumar B
• Created: 23/Jul/15 07:06
• Updated: 30/Aug/16 01:30
• Resolved: 29/Jul/15 06:17

Description

Currently HdfsServerConstants.java have following constants,

  String HOT_STORAGE_POLICY_NAME = "HOT";
  String WARM_STORAGE_POLICY_NAME = "WARM";
  String COLD_STORAGE_POLICY_NAME = "COLD";

and HdfsConstants.java have the following

  public static final String MEMORY_STORAGE_POLICY_NAME = "LAZY_PERSIST";
  public static final String ALLSSD_STORAGE_POLICY_NAME = "ALL_SSD";
  public static final String ONESSD_STORAGE_POLICY_NAME = "ONE_SSD";

It would be better to move all these to one place HdfsConstants.java, which client APIs also could access since this presents in hdfs-client module.