[HDFS-11773] Ozone: KSM : add listVolumes

• Type: Sub-task
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: HDFS-7240
• Component/s: ozone
• Hadoop Flags: Reviewed
• Assignee: Weiwei Yang
• Reporter: Anu Engineer
• Created: 09/May/17 05:13
• Updated: 26/Apr/18 21:51
• Resolved: 01/Jul/17 06:54

Description

List volume call can be used in three different contexts. One is for the administrators to list all volumes in a cluster. Second is for the administrator to list the volumes owned by a specific user. Third is a user listing the volumes owned by himself/herself.

Since these calls can return large number of entries the rest protocol supports paging. Paging is supported by the use of prevKey, prefix and maxKeys. The caller is aware the this call is neither atomic nor consistent. So we can iterate over the list even while changes are happening to the list.

Issue Links

• requires: HDFS-11926 Ozone: Implement a common helper to return a range of KVs in levelDB