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From "Rohith Sharma K S (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-4609) RM Nodes list page takes too much time to load
Date Wed, 30 Mar 2016 07:28:25 GMT

    [ https://issues.apache.org/jira/browse/YARN-4609?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15217582#comment-15217582
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Rohith Sharma K S commented on YARN-4609:
-----------------------------------------

Going through this ticket, Good observation [~bibinchundatt]:-)  This optimization is really
helpful in large cluster.
The overall patch looks good to me.

One of the article I read about defferRedering after this issue is [link|https://datatables.net/examples/ajax/defer_render.html].
They explain how the tables are rendered fast if they enable defferRedering.
{code}
When deferred rendering is enabled, rather than having DataTables create all TR and TD nodes
required for the table when the data is loaded, DataTables will only create the nodes required
for each individual row at the time of that row being drawn on the page (these nodes are then
retained in case they are needed again so they aren't created multiple times). This can give
a significant performance increase, since a lot less work is done at initialisation time.
{code}

I will simulate with and without patch, let me see the difference in page loading time.

> RM Nodes list page takes too much time to load
> ----------------------------------------------
>
>                 Key: YARN-4609
>                 URL: https://issues.apache.org/jira/browse/YARN-4609
>             Project: Hadoop YARN
>          Issue Type: Bug
>            Reporter: Bibin A Chundatt
>            Assignee: Bibin A Chundatt
>         Attachments: 0001-YARN-4609.patch, 0002-YARN-4609.patch, 7k Nodes.png, sls-jobs.json,
sls-nodes.json
>
>
> Configure SLS with 10000 NM Nodes
> Check the time taken to load Nodes page
> For loading 10 k Nodes it takes *30 sec*
>  <RM IP>/cluster/nodes
> Chrome :Version 47.0.2526.106 m



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