[HDDS-1461] Optimize listStatus api in OzoneFileSystem

• Type: Sub-task
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 0.5.0
• Component/s: Ozone Filesystem, Ozone Manager
• Labels: pull-request-available
• Target Version/s: 0.5.0
• Assignee: Lokesh Jain
• Reporter: Lokesh Jain
• Created: 24/Apr/19 14:17
• Updated: 24/Feb/20 20:53
• Resolved: 21/May/19 09:20

Description

Currently in listStatus we make multiple getFileStatus calls. This can be optimized by converting to a single rpc call for listStatus.

Also currently listStatus has to traverse a directory recursively in order to list its immediate children. This happens because in OzoneManager all the metadata is stored in rocksdb sorted on keynames. The Jira also aims to fix this by using seek api provided by rocksdb.

Issue Links

• links to: GitHub Pull Request #782