What's New in Apache Hadoop YARN
Learn about the new features of Hadoop YARN in Cloudera Runtime 7.2.14.
UI update for Dynamic Queue Scheduling
The YARN Queue Manager UI for the Dynamic Queue Scheduling feature has been revised. The Set Schedule step is now called Specify Schedule and it display all supported scheduling options on a single page. Previously, the available options were organized into multiple tabs.
For more information about the Dynamic Queue Scheduling feature, see Dynamic Queue Scheduling [Technical Preview].
Editing placement rules
Support to edit previously created placement rules was added. For more information, see Edit placement rules.
Setting Maximum Parallel Application Limits
You can set the maximum number of applications that can run at the same time in a cluster. You can set parallel application limits for all queues, a specific queue, all users, and at the user level.
For more information, see Setting Maximum Parallel Application limits.
New YARN Queue Manager Overview Page
- Minimap: The Overview page now has a minimap of the queue structure. It shows the whole queue structure even if you zoom in to a specific part of it.
- Refresh: You can click the Refresh icon for in-screen refresh of the page.
- Zoom and Panning : You can use the mouse to zoom in and zoom out on the screen to view the queue structure. You can also drag the queue structure to see different parts of the structure.
- Tool Tip: You can hover on the queue name for information like queue name and its queue path, queue status, and capacity. Previously, only the queue name and its path was displayed.
