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Posted to reviews@spark.apache.org by davies <gi...@git.apache.org> on 2016/04/06 02:15:20 UTC
[GitHub] spark pull request: [SPARK-14119] [SQL] Improve HashedRelation for...
GitHub user davies opened a pull request:
https://github.com/apache/spark/pull/12190
[SPARK-14119] [SQL] Improve HashedRelation for key fit within Long
## What changes were proposed in this pull request?
Currently, we use java HashMap for HashedRelation if the key could fit within a Long. The java HashMap and CompactBuffer are not memory efficient, the memory used by them is also accounted accurately.
This PR introduce a LongToUnsafeRowMap (similar to BytesToBytesMap) for better memory efficiency and performance.
## How was this patch tested?
Existing tests.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/davies/spark long_map2
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/12190.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 #12190
----
commit b02b1d128fd8108a9af64e0cd7db65a7fcacca26
Author: Davies Liu <da...@databricks.com>
Date: 2016-04-05T04:56:35Z
LongToUnsafeRowMap
commit 1b68736b72e0cc710a01ccbfd46e957b2fa5132f
Author: Davies Liu <da...@databricks.com>
Date: 2016-04-06T00:08:47Z
update benchmark & cleanup
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[GitHub] spark pull request: [SPARK-14119] [SQL] Improve HashedRelation for...
Posted by AmplabJenkins <gi...@git.apache.org>.
Github user AmplabJenkins commented on the pull request:
https://github.com/apache/spark/pull/12190#issuecomment-206044561
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[GitHub] spark pull request: [SPARK-14119] [SQL] Improve HashedRelation for...
Posted by SparkQA <gi...@git.apache.org>.
Github user SparkQA commented on the pull request:
https://github.com/apache/spark/pull/12190#issuecomment-206047062
**[Test build #55062 has finished](https://amplab.cs.berkeley.edu/jenkins/job/SparkPullRequestBuilder/55062/consoleFull)** for PR 12190 at commit [`87e32f3`](https://github.com/apache/spark/commit/87e32f368f775a37f9b9ad3f7c18f29ee05db12f).
* This patch **fails Scala style tests**.
* This patch merges cleanly.
* This patch adds no public classes.
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[GitHub] spark pull request: [SPARK-14419] [SQL] Improve HashedRelation for...
Posted by AmplabJenkins <gi...@git.apache.org>.
Github user AmplabJenkins commented on the pull request:
https://github.com/apache/spark/pull/12190#issuecomment-207733915
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[GitHub] spark pull request: [SPARK-14119] [SQL] Improve HashedRelation for...
Posted by AmplabJenkins <gi...@git.apache.org>.
Github user AmplabJenkins commented on the pull request:
https://github.com/apache/spark/pull/12190#issuecomment-206047077
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[GitHub] spark pull request: [SPARK-14119] [SQL] Improve HashedRelation for...
Posted by AmplabJenkins <gi...@git.apache.org>.
Github user AmplabJenkins commented on the pull request:
https://github.com/apache/spark/pull/12190#issuecomment-206047081
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[GitHub] spark pull request: [SPARK-14119] [SQL] Improve HashedRelation for...
Posted by rxin <gi...@git.apache.org>.
Github user rxin commented on a diff in the pull request:
https://github.com/apache/spark/pull/12190#discussion_r58643780
--- Diff: sql/core/src/main/scala/org/apache/spark/sql/execution/joins/HashedRelation.scala ---
@@ -321,144 +302,422 @@ private[joins] object UnsafeHashedRelation {
}
}
+object LongToUnsafeRowMap {
+ // the largest prime that below 2^n
+ val LARGEST_PRIMES = {
+ // https://primes.utm.edu/lists/2small/0bit.html
+ val diffs = Seq(
+ 0, 1, 1, 3, 1, 3, 1, 5,
+ 3, 3, 9, 3, 1, 3, 19, 15,
+ 1, 5, 1, 3, 9, 3, 15, 3,
+ 39, 5, 39, 57, 3, 35, 1, 5
+ )
+ val primes = new Array[Int](32)
+ primes(0) = 1
+ var power2 = 1
+ (1 until 32).foreach { i =>
+ power2 *= 2
+ primes(i) = power2 - diffs(i)
+ }
+ primes
+ }
+
+ val DENSE_FACTOR = 0.2
+}
+
/**
- * An interface for a hashed relation that the key is a Long.
+ * An hash map mapping from key of Long to UnsafeRow.
*/
-private[joins] trait LongHashedRelation extends HashedRelation {
- override def get(key: InternalRow): Iterator[InternalRow] = {
- get(key.getLong(0))
+final class LongToUnsafeRowMap(var mm: TaskMemoryManager, capacity: Int)
--- End diff --
can you describe the physical data layout in the comments here?
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[GitHub] spark pull request: [SPARK-14419] [SQL] Improve HashedRelation for...
Posted by AmplabJenkins <gi...@git.apache.org>.
Github user AmplabJenkins commented on the pull request:
https://github.com/apache/spark/pull/12190#issuecomment-207715640
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[GitHub] spark pull request: [SPARK-14419] [SQL] Improve HashedRelation for...
Posted by SparkQA <gi...@git.apache.org>.
Github user SparkQA commented on the pull request:
https://github.com/apache/spark/pull/12190#issuecomment-207714621
**[Test build #55421 has finished](https://amplab.cs.berkeley.edu/jenkins/job/SparkPullRequestBuilder/55421/consoleFull)** for PR 12190 at commit [`028eec5`](https://github.com/apache/spark/commit/028eec539960b92a0b0188a8ba3d8f149230e5a5).
* This patch **fails Scala style tests**.
* This patch merges cleanly.
* This patch adds no public classes.
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[GitHub] spark pull request: [SPARK-14419] [SQL] Improve HashedRelation for...
Posted by AmplabJenkins <gi...@git.apache.org>.
Github user AmplabJenkins commented on the pull request:
https://github.com/apache/spark/pull/12190#issuecomment-207715642
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[GitHub] spark pull request: [SPARK-14119] [SQL] Improve HashedRelation for...
Posted by AmplabJenkins <gi...@git.apache.org>.
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https://github.com/apache/spark/pull/12190#issuecomment-206044562
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[GitHub] spark pull request: [SPARK-14419] [SQL] Improve HashedRelation for...
Posted by sameeragarwal <gi...@git.apache.org>.
Github user sameeragarwal commented on the pull request:
https://github.com/apache/spark/pull/12190#issuecomment-207548531
These changes LGTM. It'd be great to add comments that (a) describe the physical layout of the entire data structure (b) explain why lookups are faster (cheaper hash/compare etc.)
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[GitHub] spark pull request: [SPARK-14419] [SQL] Improve HashedRelation for...
Posted by davies <gi...@git.apache.org>.
Github user davies commented on the pull request:
https://github.com/apache/spark/pull/12190#issuecomment-207734409
Merging this into master, thanks!
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[GitHub] spark pull request: [SPARK-14119] [SQL] Improve HashedRelation for...
Posted by SparkQA <gi...@git.apache.org>.
Github user SparkQA commented on the pull request:
https://github.com/apache/spark/pull/12190#issuecomment-206046488
**[Test build #55062 has started](https://amplab.cs.berkeley.edu/jenkins/job/SparkPullRequestBuilder/55062/consoleFull)** for PR 12190 at commit [`87e32f3`](https://github.com/apache/spark/commit/87e32f368f775a37f9b9ad3f7c18f29ee05db12f).
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[GitHub] spark pull request: [SPARK-14119] [SQL] Improve HashedRelation for...
Posted by yhuai <gi...@git.apache.org>.
Github user yhuai commented on the pull request:
https://github.com/apache/spark/pull/12190#issuecomment-206113594
wrong jira?
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[GitHub] spark pull request: [SPARK-14419] [SQL] Improve HashedRelation for...
Posted by asfgit <gi...@git.apache.org>.
Github user asfgit closed the pull request at:
https://github.com/apache/spark/pull/12190
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[GitHub] spark pull request: [SPARK-14419] [SQL] Improve HashedRelation for...
Posted by SparkQA <gi...@git.apache.org>.
Github user SparkQA commented on the pull request:
https://github.com/apache/spark/pull/12190#issuecomment-207715638
**[Test build #55422 has finished](https://amplab.cs.berkeley.edu/jenkins/job/SparkPullRequestBuilder/55422/consoleFull)** for PR 12190 at commit [`5656379`](https://github.com/apache/spark/commit/5656379df2c37c17f108a990d5f98a705d7774ce).
* This patch **fails Scala style tests**.
* This patch merges cleanly.
* This patch adds no public classes.
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[GitHub] spark pull request: [SPARK-14419] [SQL] Improve HashedRelation for...
Posted by AmplabJenkins <gi...@git.apache.org>.
Github user AmplabJenkins commented on the pull request:
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[GitHub] spark pull request: [SPARK-14419] [SQL] Improve HashedRelation for...
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[GitHub] spark pull request: [SPARK-14419] [SQL] Improve HashedRelation for...
Posted by SparkQA <gi...@git.apache.org>.
Github user SparkQA commented on the pull request:
https://github.com/apache/spark/pull/12190#issuecomment-207733865
**[Test build #55423 has finished](https://amplab.cs.berkeley.edu/jenkins/job/SparkPullRequestBuilder/55423/consoleFull)** for PR 12190 at commit [`32c2165`](https://github.com/apache/spark/commit/32c2165e455fc1e1dd864b60a3f1b0b16991d50b).
* This patch passes all tests.
* This patch merges cleanly.
* This patch adds no public classes.
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[GitHub] spark pull request: [SPARK-14419] [SQL] Improve HashedRelation for...
Posted by SparkQA <gi...@git.apache.org>.
Github user SparkQA commented on the pull request:
https://github.com/apache/spark/pull/12190#issuecomment-207715602
**[Test build #55422 has started](https://amplab.cs.berkeley.edu/jenkins/job/SparkPullRequestBuilder/55422/consoleFull)** for PR 12190 at commit [`5656379`](https://github.com/apache/spark/commit/5656379df2c37c17f108a990d5f98a705d7774ce).
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[GitHub] spark pull request: [SPARK-14119] [SQL] Improve HashedRelation for...
Posted by SparkQA <gi...@git.apache.org>.
Github user SparkQA commented on the pull request:
https://github.com/apache/spark/pull/12190#issuecomment-206044559
**[Test build #55060 has finished](https://amplab.cs.berkeley.edu/jenkins/job/SparkPullRequestBuilder/55060/consoleFull)** for PR 12190 at commit [`1b68736`](https://github.com/apache/spark/commit/1b68736b72e0cc710a01ccbfd46e957b2fa5132f).
* This patch **fails Scala style tests**.
* This patch merges cleanly.
* This patch adds the following public classes _(experimental)_:
* `final class LongToUnsafeRowMap(var mm: TaskMemoryManager, capacity: Int)`
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[GitHub] spark pull request: [SPARK-14419] [SQL] Improve HashedRelation for...
Posted by AmplabJenkins <gi...@git.apache.org>.
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[GitHub] spark pull request: [SPARK-14419] [SQL] Improve HashedRelation for...
Posted by SparkQA <gi...@git.apache.org>.
Github user SparkQA commented on the pull request:
https://github.com/apache/spark/pull/12190#issuecomment-207716800
**[Test build #55423 has started](https://amplab.cs.berkeley.edu/jenkins/job/SparkPullRequestBuilder/55423/consoleFull)** for PR 12190 at commit [`32c2165`](https://github.com/apache/spark/commit/32c2165e455fc1e1dd864b60a3f1b0b16991d50b).
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[GitHub] spark pull request: [SPARK-14419] [SQL] Improve HashedRelation for...
Posted by SparkQA <gi...@git.apache.org>.
Github user SparkQA commented on the pull request:
https://github.com/apache/spark/pull/12190#issuecomment-207714577
**[Test build #55421 has started](https://amplab.cs.berkeley.edu/jenkins/job/SparkPullRequestBuilder/55421/consoleFull)** for PR 12190 at commit [`028eec5`](https://github.com/apache/spark/commit/028eec539960b92a0b0188a8ba3d8f149230e5a5).
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[GitHub] spark pull request: [SPARK-14119] [SQL] Improve HashedRelation for...
Posted by SparkQA <gi...@git.apache.org>.
Github user SparkQA commented on the pull request:
https://github.com/apache/spark/pull/12190#issuecomment-206044309
**[Test build #55060 has started](https://amplab.cs.berkeley.edu/jenkins/job/SparkPullRequestBuilder/55060/consoleFull)** for PR 12190 at commit [`1b68736`](https://github.com/apache/spark/commit/1b68736b72e0cc710a01ccbfd46e957b2fa5132f).
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