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YARN-6098. Add documentation for Delete Queue. (Suma Shivaprasad via wangda) 

Change-Id: I23bf7ca0acbe1168a7f805ceccdd62fe41bfeb35
(cherry picked from commit bfb88b10f4)
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Wangda Tan 2018-10-18 10:55:39 -07:00
parent 46baafedf1
commit d381f32219
1 changed files with 13 additions and 1 deletions
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hadoop-yarn-project/hadoop-yarn/hadoop-yarn-site/src/site/markdown/CapacityScheduler.md
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@ -54,7 +54,7 @@ The `CapacityScheduler` supports the following features:
* **Operability**
* Runtime Configuration - The queue definitions and properties such as capacity, ACLs can be changed, at runtime, by administrators in a secure manner to minimize disruption to users. Also, a console is provided for users and administrators to view current allocation of resources to various queues in the system. Administrators can *add additional queues* at runtime, but queues cannot be *deleted* at runtime.
* Runtime Configuration - The queue definitions and properties such as capacity, ACLs can be changed, at runtime, by administrators in a secure manner to minimize disruption to users. Also, a console is provided for users and administrators to view current allocation of resources to various queues in the system. Administrators can *add additional queues* at runtime, but queues cannot be *deleted* at runtime unless the queue is STOPPED and nhas no pending/running apps.
* Drain applications - Administrators can *stop* queues at runtime to ensure that while existing applications run to completion, no new applications can be submitted. If a queue is in `STOPPED` state, new applications cannot be submitted to *itself* or *any of its child queues*. Existing applications continue to completion, thus the queue can be *drained* gracefully. Administrators can also *start* the stopped queues.
@ -430,6 +430,18 @@ Changing queue/scheduler properties and adding/removing queues can be done in tw
$ vi $HADOOP_CONF_DIR/capacity-scheduler.xml
$ $HADOOP_YARN_HOME/bin/yarn rmadmin -refreshQueues
#### Deleting queue via file
Step 1: Stop the queue
Before deleting a leaf queue, the leaf queue should not have any running/pending apps and has to BE STOPPED by changing `yarn.scheduler.capacity.<queue-path>.state`. See the
[Queue Administration & Permissions](CapacityScheduler.html#Queue Properties) section.
Before deleting a parent queue, all its child queues should not have any running/pending apps and have to BE STOPPED. The parent queue also needs to be STOPPED
Step 2: Delete the queue
Remove the queue configurations from the file and run refresh as described above
### Changing queue configuration via API
Editing by API uses a backing store for the scheduler configuration. To enable this, the following parameters can be configured in yarn-site.xml.