[HDDS-7142] Recon: Add Erasure Coding Statistics

• Type: Sub-task
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Assignee: Unassigned
• Reporter: Siyao Meng
• Created: 18/Aug/22 19:23
• Updated: 19/Jan/24 09:09

Description

Thought: a new tab page (can be integrated with a "File Browser")

• Lists buckets under volumes. Display the current bucket replication policy: Ratis-3 / RS-6-3-1024k
• Optional filter to search for buckets. and show buckets that have EC enabled
• For keys inside a bucket, show the block status:

• (1) For RATIS-1, show the DN name that has the block.
• (2) For RATIS-3, show the three DN names that carrys the block.
• (3) For EC, show all the DN names that has the striped blocks, and their respective index – Recon should already have this piece of information because DataNodes are already reporting to the Recon.

• Add a warning indicator if a key/file is under-replicated. e.g. with RATIS-3, when the cluster has less than 3 live blocks; with RS-6-3-1024k, when the cluster has less than 9 live striped blocks

EC documentation: https://ozone.apache.org/docs/edge/feature/erasurecoding.html

CC umamaheswararao