Github user gatorsmile commented on a diff in the pull request:
https://github.com/apache/spark/pull/15541#discussion_r84591196
--- Diff: docs/configuration.md ---
@@ -1342,6 +1342,20 @@ Apart from these, the following properties are also
available, and may be useful
Should be greater than or equal to 1. Number of allowed retries = this
value - 1.
</td>
</tr>
+<tr>
+ <td><code>spark.scheduler.taskAssigner</code></td>
+ <td>roundrobin</td>
+ <td>
+ The strategy of how to allocate tasks among workers with free cores.
There are three task
+ assigners (roundrobin, packed, and balanced) are supported currently.
By default, roundrobin
+ with randomness is used, which tries to allocate task to workers with
available cores in
+ roundrobin manner. The packed task assigner tries to allocate tasks to
workers with the least
+ free cores, resulting in tasks assigned to few workers, which may help
driver to release the
+ reserved idle workers when dynamic
allocation(spark.dynamicAllocation.enabled) is enabled.
+ The balanced task assigner tries to assign tasks across workers in a
balance way (allocating
--- End diff --
`balance ` -> `balanced `
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