Ivan Andika created HDDS-14424:
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Summary: OM Follower Read
Key: HDDS-14424
URL: https://issues.apache.org/jira/browse/HDDS-14424
Project: Apache Ozone
Issue Type: Improvement
Reporter: Ivan Andika
Assignee: Ivan Andika
This is epic is to implement features that allow client to read from OM
followers.
The purpose of reading from OM followers are
* Increase resource utilization : increase the overall read throughput to
overcome the read bottleneck of a single OM leader and increase overall read
throughput.
* Improve write throughput: Leader write throughput might also increase since
it does need to content with reads
* Reduce read latency (if possible): This can be achieved by reading from the
nearest follower and avoiding inter DC traffic
** If the client and OM leader is in different DC, we can read from OM follower
*** The read payloads for list and get might be big so we can reduce the
traffic cost
** This will be enhanced if we can support follower reads that do not need to
talk to the leader for each read request (e.g. through ReadIndex) by
sacrificing some consistency
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