[HDDS-4360] ListFileStatus : list all the descendants of a given dir recursively

• Type: Sub-task
• Status: Resolved
• Priority: Major
• Resolution: Won't Fix
• Assignee: Rakesh Radhakrishnan
• Reporter: Rakesh Radhakrishnan
• Created: 20/Oct/20 16:12
• Updated: 08/Apr/21 16:58
• Resolved: 08/Apr/21 16:58

Description

This task is to handle listing files with recursive flag true. Here it has to list all the descendants of a given directory.

OzoneManagerFS#listStatus(keyArgs, recursive, startKey, numEntries);

Hint: 

When recursive flag=true, parentID can change between two pages. Say, Constants.LISTING_PAGE_SIZE = 1024.

For example: OM has a namespace like,

/dir1/1...1Million files and /dir1/dir2/1...1Million files.
/dir1/1...1Million directories and /dir1/dir2/1...1Million directories.

Listing "/dir1" will change its parentID when fetching the files under "/dir1/dir2"
which will be taken from startKey="/dir1/dir2" value.