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Posted to reviews@spark.apache.org by sitalkedia <gi...@git.apache.org> on 2016/06/16 01:36:27 UTC
[GitHub] spark pull request #13699: [SPARK-15958] Make initial buffer size for the So...
GitHub user sitalkedia opened a pull request:
https://github.com/apache/spark/pull/13699
[SPARK-15958] Make initial buffer size for the Sorter configurable
## What changes were proposed in this pull request?
Currently the initial buffer size in the sorter is hard coded inside the code and is too small for large workload. As a result, the sorter spends significant time expanding the buffer size and copying the data. It would be useful to have it configurable.
## How was this patch tested?
Tested by running a job on the cluster.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/sitalkedia/spark config_sort_buffer_upstream
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/13699.patch
To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:
This closes #13699
----
commit 82e540c00c85f0c9f2d9d34c37420752fce2d18f
Author: Sital Kedia <sk...@fb.com>
Date: 2016-06-15T00:56:18Z
[SPARK-15958] Make initial buffer size for the Sorter configurable
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[GitHub] spark issue #13699: [SPARK-15958] Make initial buffer size for the Sorter co...
Posted by SparkQA <gi...@git.apache.org>.
Github user SparkQA commented on the issue:
https://github.com/apache/spark/pull/13699
**[Test build #61140 has finished](https://amplab.cs.berkeley.edu/jenkins/job/SparkPullRequestBuilder/61140/consoleFull)** for PR 13699 at commit [`cf464a3`](https://github.com/apache/spark/commit/cf464a3eae5d2fa86f4946c302b15df9d9ee1a21).
* This patch passes all tests.
* This patch merges cleanly.
* This patch adds no public classes.
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[GitHub] spark pull request #13699: [SPARK-15958] Make initial buffer size for the So...
Posted by sitalkedia <gi...@git.apache.org>.
Github user sitalkedia commented on a diff in the pull request:
https://github.com/apache/spark/pull/13699#discussion_r67389051
--- Diff: core/src/main/java/org/apache/spark/shuffle/sort/UnsafeShuffleWriter.java ---
@@ -122,6 +123,8 @@ public UnsafeShuffleWriter(
this.taskContext = taskContext;
this.sparkConf = sparkConf;
this.transferToEnabled = sparkConf.getBoolean("spark.file.transferTo", true);
+ this.initialSortBufferSize = sparkConf.getInt("spark.shuffle.initial.buffer.size",
--- End diff --
@srowen - Making the size significantly larger (in our case we are using 64MB instead of 64KB by default) will not work well in case you have small amount of heap memory available. Also that might not be helpful for small datasets.
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[GitHub] spark issue #13699: [SPARK-15958] Make initial buffer size for the Sorter co...
Posted by AmplabJenkins <gi...@git.apache.org>.
Github user AmplabJenkins commented on the issue:
https://github.com/apache/spark/pull/13699
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[GitHub] spark issue #13699: [SPARK-15958] Make initial buffer size for the Sorter co...
Posted by SparkQA <gi...@git.apache.org>.
Github user SparkQA commented on the issue:
https://github.com/apache/spark/pull/13699
**[Test build #61140 has started](https://amplab.cs.berkeley.edu/jenkins/job/SparkPullRequestBuilder/61140/consoleFull)** for PR 13699 at commit [`cf464a3`](https://github.com/apache/spark/commit/cf464a3eae5d2fa86f4946c302b15df9d9ee1a21).
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[GitHub] spark pull request #13699: [SPARK-15958] Make initial buffer size for the So...
Posted by srowen <gi...@git.apache.org>.
Github user srowen commented on a diff in the pull request:
https://github.com/apache/spark/pull/13699#discussion_r68184716
--- Diff: core/src/main/java/org/apache/spark/shuffle/sort/UnsafeShuffleWriter.java ---
@@ -122,6 +123,8 @@ public UnsafeShuffleWriter(
this.taskContext = taskContext;
this.sparkConf = sparkConf;
this.transferToEnabled = sparkConf.getBoolean("spark.file.transferTo", true);
+ this.initialSortBufferSize = sparkConf.getInt("spark.shuffle.initial.buffer.size",
--- End diff --
Given the hierarchy of other property names, maybe `spark.shuffle.sort.initialBufferSize`?
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[GitHub] spark issue #13699: [SPARK-15958] Make initial buffer size for the Sorter co...
Posted by sitalkedia <gi...@git.apache.org>.
Github user sitalkedia commented on the issue:
https://github.com/apache/spark/pull/13699
@srowen - Does this change seem reasonable?
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[GitHub] spark issue #13699: [SPARK-15958] Make initial buffer size for the Sorter co...
Posted by AmplabJenkins <gi...@git.apache.org>.
Github user AmplabJenkins commented on the issue:
https://github.com/apache/spark/pull/13699
Merged build finished. Test FAILed.
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[GitHub] spark issue #13699: [SPARK-15958] Make initial buffer size for the Sorter co...
Posted by sitalkedia <gi...@git.apache.org>.
Github user sitalkedia commented on the issue:
https://github.com/apache/spark/pull/13699
Fixed test failure.
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https://github.com/apache/spark/pull/13699
**[Test build #60620 has started](https://amplab.cs.berkeley.edu/jenkins/job/SparkPullRequestBuilder/60620/consoleFull)** for PR 13699 at commit [`82e540c`](https://github.com/apache/spark/commit/82e540c00c85f0c9f2d9d34c37420752fce2d18f).
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[GitHub] spark issue #13699: [SPARK-15958] Make initial buffer size for the Sorter co...
Posted by SparkQA <gi...@git.apache.org>.
Github user SparkQA commented on the issue:
https://github.com/apache/spark/pull/13699
**[Test build #60620 has finished](https://amplab.cs.berkeley.edu/jenkins/job/SparkPullRequestBuilder/60620/consoleFull)** for PR 13699 at commit [`82e540c`](https://github.com/apache/spark/commit/82e540c00c85f0c9f2d9d34c37420752fce2d18f).
* This patch **fails Spark unit tests**.
* This patch merges cleanly.
* This patch adds the following public classes _(experimental)_:
* `final class UnsafeExternalRowSorter `
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[GitHub] spark pull request #13699: [SPARK-15958] Make initial buffer size for the So...
Posted by asfgit <gi...@git.apache.org>.
Github user asfgit closed the pull request at:
https://github.com/apache/spark/pull/13699
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[GitHub] spark pull request #13699: [SPARK-15958] Make initial buffer size for the So...
Posted by sitalkedia <gi...@git.apache.org>.
Github user sitalkedia commented on a diff in the pull request:
https://github.com/apache/spark/pull/13699#discussion_r68340566
--- Diff: core/src/main/java/org/apache/spark/shuffle/sort/UnsafeShuffleWriter.java ---
@@ -122,6 +123,8 @@ public UnsafeShuffleWriter(
this.taskContext = taskContext;
this.sparkConf = sparkConf;
this.transferToEnabled = sparkConf.getBoolean("spark.file.transferTo", true);
+ this.initialSortBufferSize = sparkConf.getInt("spark.shuffle.initial.buffer.size",
--- End diff --
Thats a good point, made the change.
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[GitHub] spark issue #13699: [SPARK-15958] Make initial buffer size for the Sorter co...
Posted by SparkQA <gi...@git.apache.org>.
Github user SparkQA commented on the issue:
https://github.com/apache/spark/pull/13699
**[Test build #60991 has started](https://amplab.cs.berkeley.edu/jenkins/job/SparkPullRequestBuilder/60991/consoleFull)** for PR 13699 at commit [`13c9b2f`](https://github.com/apache/spark/commit/13c9b2fc7b05a67663f22dbb47fdc73278ea5792).
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https://github.com/apache/spark/pull/13699
**[Test build #60649 has finished](https://amplab.cs.berkeley.edu/jenkins/job/SparkPullRequestBuilder/60649/consoleFull)** for PR 13699 at commit [`a273396`](https://github.com/apache/spark/commit/a2733969c82add56535478bf131ffcb407afdaad).
* This patch passes all tests.
* This patch merges cleanly.
* This patch adds no public classes.
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Posted by AmplabJenkins <gi...@git.apache.org>.
Github user AmplabJenkins commented on the issue:
https://github.com/apache/spark/pull/13699
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[GitHub] spark pull request #13699: [SPARK-15958] Make initial buffer size for the So...
Posted by srowen <gi...@git.apache.org>.
Github user srowen commented on a diff in the pull request:
https://github.com/apache/spark/pull/13699#discussion_r67950589
--- Diff: sql/core/src/main/java/org/apache/spark/sql/execution/UnsafeKVExternalSorter.java ---
@@ -44,6 +45,7 @@
*/
public final class UnsafeKVExternalSorter {
+ private static final int DEFAULT_INITIAL_SORT_BUFFER_SIZE = 4096;
--- End diff --
We have this constant repeated in 3 places. I think 2 of them can be combined -- the ones in the same package at least.
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[GitHub] spark issue #13699: [SPARK-15958] Make initial buffer size for the Sorter co...
Posted by SparkQA <gi...@git.apache.org>.
Github user SparkQA commented on the issue:
https://github.com/apache/spark/pull/13699
**[Test build #60991 has finished](https://amplab.cs.berkeley.edu/jenkins/job/SparkPullRequestBuilder/60991/consoleFull)** for PR 13699 at commit [`13c9b2f`](https://github.com/apache/spark/commit/13c9b2fc7b05a67663f22dbb47fdc73278ea5792).
* This patch passes all tests.
* This patch merges cleanly.
* This patch adds no public classes.
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[GitHub] spark pull request #13699: [SPARK-15958] Make initial buffer size for the So...
Posted by sitalkedia <gi...@git.apache.org>.
Github user sitalkedia commented on a diff in the pull request:
https://github.com/apache/spark/pull/13699#discussion_r67978652
--- Diff: sql/core/src/main/java/org/apache/spark/sql/execution/UnsafeKVExternalSorter.java ---
@@ -44,6 +45,7 @@
*/
public final class UnsafeKVExternalSorter {
+ private static final int DEFAULT_INITIAL_SORT_BUFFER_SIZE = 4096;
--- End diff --
Changed accordingly.
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[GitHub] spark issue #13699: [SPARK-15958] Make initial buffer size for the Sorter co...
Posted by srowen <gi...@git.apache.org>.
Github user srowen commented on the issue:
https://github.com/apache/spark/pull/13699
Merged to master
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https://github.com/apache/spark/pull/13699
**[Test build #60649 has started](https://amplab.cs.berkeley.edu/jenkins/job/SparkPullRequestBuilder/60649/consoleFull)** for PR 13699 at commit [`a273396`](https://github.com/apache/spark/commit/a2733969c82add56535478bf131ffcb407afdaad).
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[GitHub] spark pull request #13699: [SPARK-15958] Make initial buffer size for the So...
Posted by srowen <gi...@git.apache.org>.
Github user srowen commented on a diff in the pull request:
https://github.com/apache/spark/pull/13699#discussion_r67361641
--- Diff: core/src/main/java/org/apache/spark/shuffle/sort/UnsafeShuffleWriter.java ---
@@ -122,6 +123,8 @@ public UnsafeShuffleWriter(
this.taskContext = taskContext;
this.sparkConf = sparkConf;
this.transferToEnabled = sparkConf.getBoolean("spark.file.transferTo", true);
+ this.initialSortBufferSize = sparkConf.getInt("spark.shuffle.initial.buffer.size",
--- End diff --
Is it worth making yet another knob to twiddle, or just making this size significantly larger in general?
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https://github.com/apache/spark/pull/13699
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