[HDDS-505] Ozone Manager HA (implemented)

 

Abstract

HA for Ozone Manager with the help of Ratis. High performance operation with caching and double-buffer (separated doc).

Link

• https://issues.apache.org/jira/secure/attachment/12940314/OzoneManager%20HA.pdf

• https://issues.apache.org/jira/secure/attachment/12990063/OM%20HA%20Cache%20Design.pdf

• https://issues.apache.org/jira/secure/attachment/12973260/Handling%20Write%20Requests%20with%20OM%20HA.pdf