[
https://issues.apache.org/jira/browse/NIFI-1563?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15208712#comment-15208712
]
ASF GitHub Bot commented on NIFI-1563:
--------------------------------------
Github user markap14 closed the pull request at:
https://github.com/apache/nifi/pull/294
> Remove storage of components' stats and bulletins from NCM
> ----------------------------------------------------------
>
> Key: NIFI-1563
> URL: https://issues.apache.org/jira/browse/NIFI-1563
> Project: Apache NiFi
> Issue Type: Improvement
> Components: Core Framework
> Reporter: Mark Payne
> Assignee: Mark Payne
> Fix For: 1.0.0
>
> Original Estimate: 168h
> Remaining Estimate: 168h
>
> Currently, each node in a cluster sends a period heartbeat that contains the
> stats for all components in the node. This happens every 5 seconds by
> default. This results in quite a lot of chatter between the NCM and nodes. It
> made sense to take this approach when the clustering concept was designed
> because there were no Process Groups, and we had no notion of merging
> responses from nodes for a web request.
> However, now we should replicate the request to all nodes and then merge the
> responses on demand, rather than storing this information on the NCM. This
> requires far less bandwidth because we only need to pull the stats for a
> particular Process Group and only on demand instead of every 5 seconds.
> Additionally, this is laying groundwork for the Zero-Master clustering that
> we want to have in place for 1.0.0.
> In order to remove the stats from the NCM, we will also need to remove the
> bulletins and stats history. These requests will all need to be federated and
> the responses merged on-demand.
--
This message was sent by Atlassian JIRA
(v6.3.4#6332)
