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https://issues.apache.org/jira/browse/HADOOP-3695?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Vinod Kumar Vavilapalli updated HADOOP-3695:
--------------------------------------------
Attachment: patch_multiple_workers_3.txt
Attaching a new patch.
mapred.system.dir is used only for pulling job files and obtained by TTs from
JT via RPC (from Hadoop 0.18 on. See HADOOP-3135 ). Any value in configuration
files isn't used by TTs, and so it need not be different for multiple TTs
running on the same host. In fact it doesn't need to be generated on TTs at
all. Also, verified this with Devraj. We will have to generate a unique value
for this too if we wish to support this feature for versions previous to 0.18.
Incorporated the rest of the three comments.
> [HOD] Have an ability to run multiple slaves per node
> -----------------------------------------------------
>
> Key: HADOOP-3695
> URL: https://issues.apache.org/jira/browse/HADOOP-3695
> Project: Hadoop Core
> Issue Type: New Feature
> Components: contrib/hod
> Reporter: Hemanth Yamijala
> Assignee: Vinod Kumar Vavilapalli
> Fix For: 0.19.0
>
> Attachments: patch_multiple_workers_1.txt,
> patch_multiple_workers_2.txt, patch_multiple_workers_3.txt
>
>
> Currently HOD launches at most one slave per node. For purposes of testing a
> large number of slaves on much fewer resources - for e.g. testing scalability
> of clusters, it will be useful if it can provision multiple slaves per node.
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