[GitHub] spark issue #17419: [SPARK-19634][ML] Multivariate summarizer - dataframes A...

2017-08-01 Thread thunterdb
Github user thunterdb commented on the issue:

https://github.com/apache/spark/pull/17419
  
I am going to close this PR, since this is being taken over by 
@WeichenXu123  in #18798 .


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[GitHub] spark issue #17419: [SPARK-19634][ML] Multivariate summarizer - dataframes A...

2017-07-22 Thread cloud-fan
Github user cloud-fan commented on the issue:

https://github.com/apache/spark/pull/17419
  
The copy problem is fixed in https://github.com/apache/spark/pull/18483 , I 
think we can remove this workaround in `ObjectHashAggregateExec`.


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[GitHub] spark issue #17419: [SPARK-19634][ML] Multivariate summarizer - dataframes A...

2017-07-20 Thread liancheng
Github user liancheng commented on the issue:

https://github.com/apache/spark/pull/17419
  
@WeichenXu123 and I did some profiling using `jvisualvm` and found that 40% 
of the time is spent in the copy performed by [this `safeProjection`][1]. This 
is a known issue used to fight against the false sharing issue @cloud-fan and I 
hit before.

@cloud-fan tried to fix this issue in #15082 but that PR didn't work out 
due to some other concerns (I can't remember all the details now).

@cloud-fan, any ideas about improving `ObjectHashAggregateExec` (e.g. 
adding code generation support)?

[1]: 
https://github.com/apache/spark/blob/03367d7aa3acd3abbcacba57ea75c8efa2a9a794/sql/core/src/main/scala/org/apache/spark/sql/execution/aggregate/ObjectAggregationIterator.scala#L154


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[GitHub] spark issue #17419: [SPARK-19634][ML] Multivariate summarizer - dataframes A...

2017-07-20 Thread WeichenXu123
Github user WeichenXu123 commented on the issue:

https://github.com/apache/spark/pull/17419
  
As the dataframe version is much slower than RDD version (currently test 
against vector of size 1)
I also guess there is some performance issue in 
`ObjectAggregationIterator.processInput()`
in the following code block:
```
  private def processInputs(): Unit = {
// ...
if (groupingExpressions.isEmpty) {
  // If there is no grouping expressions, we can just reuse the same 
buffer over and over again.
  val groupingKey = groupingProjection.apply(null)
  val buffer: InternalRow = getAggregationBufferByKey(hashMap, 
groupingKey)
  while (inputRows.hasNext) {
val newInput = safeProjection(inputRows.next()) 
processRow(buffer, newInput)
  }
}
...
```
This statement `val newInput = safeProjection(inputRows.next())` maybe do 
some redundant data copy (for walk-around some bugs?)

cc @cloud-fan @liancheng 


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[GitHub] spark issue #17419: [SPARK-19634][ML] Multivariate summarizer - dataframes A...

2017-03-30 Thread SparkQA
Github user SparkQA commented on the issue:

https://github.com/apache/spark/pull/17419
  
**[Test build #75406 has 
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 for PR 17419 at commit 
[`a569dac`](https://github.com/apache/spark/commit/a569dac8998d63adbc9adba1f2eb2f42967533e7).
 * This patch **fails Spark unit tests**.
 * This patch merges cleanly.
 * This patch adds no public classes.


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[GitHub] spark issue #17419: [SPARK-19634][ML] Multivariate summarizer - dataframes A...

2017-03-30 Thread AmplabJenkins
Github user AmplabJenkins commented on the issue:

https://github.com/apache/spark/pull/17419
  
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[GitHub] spark issue #17419: [SPARK-19634][ML] Multivariate summarizer - dataframes A...

2017-03-30 Thread AmplabJenkins
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https://github.com/apache/spark/pull/17419
  
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[GitHub] spark issue #17419: [SPARK-19634][ML] Multivariate summarizer - dataframes A...

2017-03-30 Thread thunterdb
Github user thunterdb commented on the issue:

https://github.com/apache/spark/pull/17419
  
I looked a bit deeper into the performance aspect. Here are some quick 
insights:
 - there was an immediate bottleneck in `VectorUDT`, which boosts the 
performance already by 3x
 - it is not clear if switching to pure Breeze operations helps given the 
overhead for tiny vectors. I will need to do more analysis on larger vectors.
 - now, most of the time is roughly split between 
`ObjectAggregationIterator.processInputs` (40%), some codegen'ed expression 
(20%) and our own `MetricsAggregate.update` (35%)

That benchmark focuses on the overhead of catalyst. I will do another 
benchmark with dense vectors to see how it fares in practice with more real 
data.


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[GitHub] spark issue #17419: [SPARK-19634][ML] Multivariate summarizer - dataframes A...

2017-03-30 Thread SparkQA
Github user SparkQA commented on the issue:

https://github.com/apache/spark/pull/17419
  
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[GitHub] spark issue #17419: [SPARK-19634][ML] Multivariate summarizer - dataframes A...

2017-03-29 Thread viirya
Github user viirya commented on the issue:

https://github.com/apache/spark/pull/17419
  
> RDD = [2482 ~ 46150 ~ 48354] records / milli

the number is so varied?


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[GitHub] spark issue #17419: [SPARK-19634][ML] Multivariate summarizer - dataframes A...

2017-03-27 Thread AmplabJenkins
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https://github.com/apache/spark/pull/17419
  
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[GitHub] spark issue #17419: [SPARK-19634][ML] Multivariate summarizer - dataframes A...

2017-03-27 Thread AmplabJenkins
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https://github.com/apache/spark/pull/17419
  
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[GitHub] spark issue #17419: [SPARK-19634][ML] Multivariate summarizer - dataframes A...

2017-03-27 Thread SparkQA
Github user SparkQA commented on the issue:

https://github.com/apache/spark/pull/17419
  
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 * This patch passes all tests.
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[GitHub] spark issue #17419: [SPARK-19634][ML] Multivariate summarizer - dataframes A...

2017-03-27 Thread thunterdb
Github user thunterdb commented on the issue:

https://github.com/apache/spark/pull/17419
  
I have added a small perf test to find the performance bottlenecks. Note 
that this test works on the worst case (vectors of size 1) from the perspective 
of overhead. Here are the numbers I currently get. I will profile the code to 
see if there are some obvious targets for optimization:

```
[min ~ median ~ max], higher is better:

RDD = [2482 ~ 46150 ~ 48354] records / milli
dataframe (variance only) = [4217 ~ 4557 ~ 4848] records / milli
dataframe = [2887 ~ 4420 ~ 4717] records / milli
```


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[GitHub] spark issue #17419: [SPARK-19634][ML] Multivariate summarizer - dataframes A...

2017-03-27 Thread SparkQA
Github user SparkQA commented on the issue:

https://github.com/apache/spark/pull/17419
  
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[GitHub] spark issue #17419: [SPARK-19634][ML] Multivariate summarizer - dataframes A...

2017-03-27 Thread thunterdb
Github user thunterdb commented on the issue:

https://github.com/apache/spark/pull/17419
  
@sethah it would have been nice, but I do not think we should merge it this 
late into the release cycle.


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[GitHub] spark issue #17419: [SPARK-19634][ML] Multivariate summarizer - dataframes A...

2017-03-27 Thread sethah
Github user sethah commented on the issue:

https://github.com/apache/spark/pull/17419
  
Is this being targeted for Spark 2.2?


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[GitHub] spark issue #17419: [SPARK-19634][ML] Multivariate summarizer - dataframes A...

2017-03-27 Thread AmplabJenkins
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https://github.com/apache/spark/pull/17419
  
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[GitHub] spark issue #17419: [SPARK-19634][ML] Multivariate summarizer - dataframes A...

2017-03-27 Thread AmplabJenkins
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[GitHub] spark issue #17419: [SPARK-19634][ML] Multivariate summarizer - dataframes A...

2017-03-27 Thread SparkQA
Github user SparkQA commented on the issue:

https://github.com/apache/spark/pull/17419
  
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[GitHub] spark issue #17419: [SPARK-19634][ML] Multivariate summarizer - dataframes A...

2017-03-27 Thread dbtsai
Github user dbtsai commented on the issue:

https://github.com/apache/spark/pull/17419
  
Will be really interested to see the performance benchmark durning the QA 
period so users can know when to use the dataframe apis or existing rdd apis. 
Thanks.


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[GitHub] spark issue #17419: [SPARK-19634][ML] Multivariate summarizer - dataframes A...

2017-03-27 Thread SparkQA
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https://github.com/apache/spark/pull/17419
  
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[GitHub] spark issue #17419: [SPARK-19634][ML] Multivariate summarizer - dataframes A...

2017-03-27 Thread jkbradley
Github user jkbradley commented on the issue:

https://github.com/apache/spark/pull/17419
  
I'll take a look later today.  Also CCing @dbtsai I know you worked on the 
old summarizer, so I thought I'd ping you here.  + @yanboliang and @holdenk 
since you commented on the design doc.


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[GitHub] spark issue #17419: [SPARK-19634][ML] Multivariate summarizer - dataframes A...

2017-03-25 Thread SparkQA
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[GitHub] spark issue #17419: [SPARK-19634][ML] Multivariate summarizer - dataframes A...

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[GitHub] spark issue #17419: [SPARK-19634][ML] Multivariate summarizer - dataframes A...

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[GitHub] spark issue #17419: [SPARK-19634][ML] Multivariate summarizer - dataframes A...

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[GitHub] spark issue #17419: [SPARK-19634][ML] Multivariate summarizer - dataframes A...

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[GitHub] spark issue #17419: [SPARK-19634][ML] Multivariate summarizer - dataframes A...

2017-03-24 Thread AmplabJenkins
Github user AmplabJenkins commented on the issue:

https://github.com/apache/spark/pull/17419
  
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[GitHub] spark issue #17419: [SPARK-19634][ML] Multivariate summarizer - dataframes A...

2017-03-24 Thread SparkQA
Github user SparkQA commented on the issue:

https://github.com/apache/spark/pull/17419
  
**[Test build #75189 has 
finished](https://amplab.cs.berkeley.edu/jenkins/job/SparkPullRequestBuilder/75189/testReport)**
 for PR 17419 at commit 
[`ffe5cfe`](https://github.com/apache/spark/commit/ffe5cfe2e5a60f3f6056d8f89f7c50bbedca3fbf).
 * This patch **fails Spark unit tests**.
 * This patch merges cleanly.
 * This patch adds no public classes.


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[GitHub] spark issue #17419: [SPARK-19634][ML] Multivariate summarizer - dataframes A...

2017-03-24 Thread AmplabJenkins
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https://github.com/apache/spark/pull/17419
  
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[GitHub] spark issue #17419: [SPARK-19634][ML] Multivariate summarizer - dataframes A...

2017-03-24 Thread AmplabJenkins
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https://github.com/apache/spark/pull/17419
  
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[GitHub] spark issue #17419: [SPARK-19634][ML] Multivariate summarizer - dataframes A...

2017-03-24 Thread SparkQA
Github user SparkQA commented on the issue:

https://github.com/apache/spark/pull/17419
  
**[Test build #75187 has 
finished](https://amplab.cs.berkeley.edu/jenkins/job/SparkPullRequestBuilder/75187/testReport)**
 for PR 17419 at commit 
[`35eaeb0`](https://github.com/apache/spark/commit/35eaeb0d02ae9cc29ae559231fe4858935315477).
 * This patch **fails Spark unit tests**.
 * This patch merges cleanly.
 * This patch adds no public classes.


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[GitHub] spark issue #17419: [SPARK-19634][ML] Multivariate summarizer - dataframes A...

2017-03-24 Thread AmplabJenkins
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https://github.com/apache/spark/pull/17419
  
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[GitHub] spark issue #17419: [SPARK-19634][ML] Multivariate summarizer - dataframes A...

2017-03-24 Thread AmplabJenkins
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https://github.com/apache/spark/pull/17419
  
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[GitHub] spark issue #17419: [SPARK-19634][ML] Multivariate summarizer - dataframes A...

2017-03-24 Thread SparkQA
Github user SparkQA commented on the issue:

https://github.com/apache/spark/pull/17419
  
**[Test build #75188 has 
finished](https://amplab.cs.berkeley.edu/jenkins/job/SparkPullRequestBuilder/75188/testReport)**
 for PR 17419 at commit 
[`58b17dc`](https://github.com/apache/spark/commit/58b17dc3af5ebc5eaeff82559bc3be3a1f64ef38).
 * This patch **fails Spark unit tests**.
 * This patch merges cleanly.
 * This patch adds no public classes.


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[GitHub] spark issue #17419: [SPARK-19634][ML] Multivariate summarizer - dataframes A...

2017-03-24 Thread SparkQA
Github user SparkQA commented on the issue:

https://github.com/apache/spark/pull/17419
  
**[Test build #75190 has 
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[`ba200bb`](https://github.com/apache/spark/commit/ba200bb1d52d468acebc9fe44f6727c570a35335).


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[GitHub] spark issue #17419: [SPARK-19634][ML] Multivariate summarizer - dataframes A...

2017-03-24 Thread SparkQA
Github user SparkQA commented on the issue:

https://github.com/apache/spark/pull/17419
  
**[Test build #75189 has 
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 for PR 17419 at commit 
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