Alejandro Fernandez created AMBARI-12698:
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Summary: Update the stack by stopping and starting services in an
orchestrated fashion
Key: AMBARI-12698
URL: https://issues.apache.org/jira/browse/AMBARI-12698
Project: Ambari
Issue Type: Epic
Components: ambari-server
Affects Versions: 2.2.0
Reporter: Alejandro Fernandez
Assignee: Alejandro Fernandez
Priority: Critical
Fix For: 2.2.0
Ambari needs to provide an option to upgrade the stack that is much faster, by
taking downtime. Instead of rolling restarts, this will stop all services, and
start them one at a time, with all hosts starting in parallel/batches.
Benefits:
* Relaxes requirements since NameNode HA is not needed
* Faster since,
** Can upgrade an entire component by parallelizing across hosts. E.g., all ZK
servers at once
** Parallelize across components. E.g., Falcon Server and Storm Nimbus servers
in parallel
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