[
https://issues.apache.org/jira/browse/AMBARI-11850?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Robert Nettleton updated AMBARI-11850:
--------------------------------------
Attachment: AMBARI-11850.patch
Uploaded initial version of patch.
> Blueprint export process is very slow in multi-node clusters
> ------------------------------------------------------------
>
> Key: AMBARI-11850
> URL: https://issues.apache.org/jira/browse/AMBARI-11850
> Project: Ambari
> Issue Type: Bug
> Components: ambari-server
> Affects Versions: 2.0.0
> Reporter: Robert Nettleton
> Assignee: Robert Nettleton
> Priority: Critical
> Fix For: 2.1.0
>
> Attachments: AMBARI-11850.patch
>
> Original Estimate: 48h
> Remaining Estimate: 48h
>
> The Blueprint export process (using the REST API to create a Blueprint based
> on a running cluster) has been found to have some performance issues in
> multi-node clusters.
> Steps to reproduce:
> 1. Setup a 3-node cluster.
> 2. Using the Ambari UI, start a cluster that includes HDFS, Yarn, MapReduce,
> Zookeeper, and Ambari Metrics. Accept all the defaults in configuration and
> host assignment.
> 3. When the cluster deployment succeeds, attempt to export a Blueprint with
> the following REST API URL:
> http://host:port/api/v1/clusters/clusterone?format=blueprint
> The Blueprint export will eventually succeed, but takes quite a while to
> complete. With some basic testing, I've determined that for a 3-node
> cluster, the Blueprint export process can take between 7-16 seconds on
> average. I've attempted the export multiple times to make sure no initial
> startup issues were involved.
> The workaround for this issue is to turn off the Ambari Metrics services
> prior to exporting the Blueprint. When Metrics is turned off, the export is
> much faster.
> The Blueprint export process needs to be updated, such that the Metrics and
> Alerting services are not called by the REST framework during a Blueprint
> export. These services add quite a bit to the overall time it takes to
> export the Blueprint, but without any real benefit, since the Blueprint does
> not make use of these services' data.
> I'm working on a fix for this, and will be submitting a patch shortly.
--
This message was sent by Atlassian JIRA
(v6.3.4#6332)
