Skip to content

misleading task number of groupByKey #403

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Closed
wants to merge 3 commits into from
Closed

misleading task number of groupByKey #403

Changes from all commits
Commits
Show all changes
3 commits
Select commit Hold shift + click to select a range
1568336
misleading task number of groupByKey
CrazyJvm Apr 14, 2014
829a995
fix format
CrazyJvm Apr 14, 2014
42f6c9e
fix format
CrazyJvm Apr 14, 2014
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
4 changes: 2 additions & 2 deletions docs/scala-programming-guide.md
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -189,8 +189,8 @@ The following tables list the transformations and actions currently supported (s
<tr>
<td> <b>groupByKey</b>([<i>numTasks</i>]) </td>
<td> When called on a dataset of (K, V) pairs, returns a dataset of (K, Seq[V]) pairs. <br />
<b>Note:</b> By default, this uses only 8 parallel tasks to do the grouping. You can pass an optional <code>numTasks</code> argument to set a different number of tasks.
</td>
<b>Note:</b> By default, if the RDD already has a partitioner, the task number is decided by the partition number of the partitioner, or else relies on the value of <code>spark.default.parallelism</code> if the property is set , otherwise depends on the partition number of the RDD. You can pass an optional <code>numTasks</code> argument to set a different number of tasks.
</td>
</tr>
<tr>
<td> <b>reduceByKey</b>(<i>func</i>, [<i>numTasks</i>]) </td>
Expand Down