[jira] [Comment Edited] (TEZ-684) Uber/Local modes for Tez

["Siddharth Seth (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/TEZ-684?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14096467#comment-14096467 ] 

Siddharth Seth edited comment on TEZ-684 at 8/14/14 2:28 AM:
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LocalResources are not handled in local mode. I'm not sure if there's a jira for this or not. It's a fairly complicated, and far-reaching change to get something like this to work. Will require the concept of a working directory - which would then have to be explicitly used.
In most cases, this isn't a problem since required libraries are already part of the client / AM. For custom resources though - this is problematic. That's the main reason SplitsOnClient_DistCache does not function.


was (Author: sseth):
LocalResources are not handled in local mode. I'm not sure if there's a jira for this or not. It's a fairly complicated, and far-reaching change to get something like this to work. Will require the concept of a working directory - which would then have to be explicitly used.

> Uber/Local modes for Tez
> ------------------------
>
>                 Key: TEZ-684
>                 URL: https://issues.apache.org/jira/browse/TEZ-684
>             Project: Apache Tez
>          Issue Type: New Feature
>            Reporter: Chen He
>            Assignee: Chen He
>         Attachments: TEZ-684-2014-7-21.patch, TEZ-684.patch, TEZ-684.patch, TEZ-684.patch, TEZ-684.patch, TEZ-684.patch, TEZ-684.patch, TEZ-684.patch, TEZ-684.patch, TEZ-684.patch, TEZ-684.patch, TEZ-684.patch, TEZ-684.patch, TezUberModeDesignDraft.png
>
>
> Similarly to MapReduce Uber-mode in Yarn, we plan to create the Uber-mode for Tez. It runs all tasks in local in one process.
> Our target is to start DAGAppMaster in local JVM and let it run all tasks in one process. 
> Here is my design: 
> Once user submits a DAG, Tez starts a instance of DAGAppMaster. This DAGAppMaster will check TezConfiguration before instantiate ContainerLauncher. If "is_Uber" is true, DAGAppMaster creates a LocalContainerLauncher. LocalTaskScheduler and LocalTaskSchedulerEventHandler will call LocalContainerLauncher to run all tasks one by one in a single JVM. Communications between ResourceManager and local classes (DAGAppMaster, LocalContainerLauncher, LocalTaskScheduler, and LocalTaskSchedulerEventHandler) are muted.



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