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Bikas Saha commented on TEZ-684: -------------------------------- bq. 3. tez.runtime.optimize.local.fetch needs to be set to true Can this be done in the TezClient itself when local mode is true? > 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. -- This message was sent by Atlassian JIRA (v6.2#6252)