[
https://issues.apache.org/jira/browse/MAPREDUCE-3375?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13149602#comment-13149602
]
Amar Kamat commented on MAPREDUCE-3375:
---------------------------------------
Vinay,
The assert statement
{noformat}
Assert.assertTrue("Simulated job's map-task heap ratio did not match.",
actHeapRatio <= expHeapRatio );
{noformat}
needs a fix. In most of the cases, {{actHeapRatio}} will be 0 as its a division
between 2 longs. So firstly the statement
{noformat}
double actHeapRatio = simuJobMapsTHU / origJobMapsTHU;
{noformat}
should be
{noformat}
double actHeapRatio = ((double)simuJobMapsTHU) / origJobMapsTHU;
{noformat}
or something like that.
Secondly, the gap between the original and simulated tasks' heap memory usage
should be checked and not the actual usages. Hence, the above mentioned formula
now becomes
{noformat}
double actHeapRatio = ((double)Math.abs(origJobMapsTHU - simuJobMapsTHU)) /
origJobMapsTHU;
{noformat}
Kindly make the modifications and re-run the system test.
> Memory Emulation system tests.
> ------------------------------
>
> Key: MAPREDUCE-3375
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-3375
> Project: Hadoop Map/Reduce
> Issue Type: Task
> Reporter: Vinay Kumar Thota
> Assignee: Vinay Kumar Thota
> Attachments: MAPREDUCE-3375.v1.patch, MAPREDUCE-3375.v2.patch,
> MAPREDUCE-3375.v3.patch, MAPREDUCE-3375.v4.patch
>
>
> 1. Test the Gridmix memory emulation feature for gridmix jobs with default
> progress interval, different input data, submission policies and user
> resolver modes . Verify the maps phase of total heap usage of gridmix jobs
> with corresponding the original job in the trace.
> 2. Test the Gridmix memory emulation feature for gridmix jobs with custom
> progress interval, different input data, submission policies and user
> resolver modes . Verify the maps phase of total heap usage of gridmix jobs
> with corresponding the original job in the trace.
> 3. Test the Gridmix memory emulation feature for gridmix jobs with default
> progress interval, different input data, submission policies and user
> resolver modes. Verify the maps and reduces phase of total heap usage metric
> of gridmix jobs with corresponding the original job in the trace.
> 4. Disable Gridmix memory emulation option and verify the jobs whether it
> emulates the heap memory or not.
>
--
This message is automatically generated by JIRA.
If you think it was sent incorrectly, please contact your JIRA administrators:
https://issues.apache.org/jira/secure/ContactAdministrators!default.jspa
For more information on JIRA, see: http://www.atlassian.com/software/jira
