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[SPARK-28209][CORE][SHUFFLE] Proposed new shuffle writer API #25007

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[SPARK-28209][CORE][SHUFFLE] Proposed new shuffle writer API #25007

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1957e82
[SPARK-25299] Introduce the new shuffle writer API (#5) (#520)
mccheah Mar 20, 2019
857552a
[SPARK-25299] Local shuffle implementation of the shuffle writer API …
mccheah Apr 3, 2019
d13037f
[SPARK-25299] Make UnsafeShuffleWriter use the new API (#536)
mccheah Apr 17, 2019
8f5fb60
[SPARK-25299] Use the shuffle writer plugin for the SortShuffleWriter…
mccheah Apr 15, 2019
e17c7ea
[SPARK-25299] Shuffle locations api (#517)
mccheah Apr 19, 2019
3f0c131
[SPARK-25299] Move shuffle writers back to being given specific parti…
mccheah Apr 19, 2019
f982df7
[SPARK-25299] Don't set map status twice in bypass merge sort shuffle…
mccheah Apr 19, 2019
6891197
[SPARK-25299] Propose a new NIO transfer API for partition writing. (…
mccheah May 24, 2019
7b44ed2
Remove shuffle location support.
mccheah Jun 27, 2019
df75f1f
Remove changes to UnsafeShuffleWriter
mccheah Jun 27, 2019
a8558af
Revert changes for SortShuffleWriter
mccheah Jun 27, 2019
806d7bb
Revert a bunch of other stuff
mccheah Jun 27, 2019
3167030
More reverts
mccheah Jun 27, 2019
70f59db
Set task contexts in failing test
mccheah Jun 28, 2019
3083d86
Fix style
mccheah Jun 28, 2019
4c3d692
Check for null on the block manager as well.
mccheah Jun 28, 2019
2421c92
Add task attempt id in the APIs
mccheah Jul 1, 2019
982f207
Address comments
mccheah Jul 8, 2019
594d1e2
Fix style
mccheah Jul 8, 2019
66aae91
Address comments.
mccheah Jul 12, 2019
8b432f9
Merge remote-tracking branch 'origin/master' into spark-shuffle-write…
mccheah Jul 17, 2019
9f597dd
Address comments.
mccheah Jul 18, 2019
86c1829
Restructure test
mccheah Jul 18, 2019
a7885ae
Add ShuffleWriteMetricsReporter to the createMapOutputWriter API.
mccheah Jul 19, 2019
9893c6c
Add more documentation
mccheah Jul 19, 2019
cd897e7
REfactor reading records from file in test
mccheah Jul 19, 2019
9f17b9b
Address comments
mccheah Jul 24, 2019
e53a001
Code tags
mccheah Jul 24, 2019
56fa450
Add some docs
mccheah Jul 24, 2019
b8b7b8d
Change mockito format in BypassMergeSortShuffleWriterSuite
mccheah Jul 25, 2019
2d29404
Remove metrics from the API.
mccheah Jul 29, 2019
06ea01a
Address more comments.
mccheah Jul 29, 2019
7dceec9
Args per line
mccheah Jul 30, 2019
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mccheah committed Jul 24, 2019
commit e53a001b30a15ebc06df6b62c5650ae6f3213477
2 changes: 1 addition & 1 deletion core/src/main/java/org/apache/spark/shuffle/api/ShuffleDataIO.java
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Expand Up @@ -35,7 +35,7 @@
* consistent throughout most of Spark's history.
* <p>
* Alternative implementations of shuffle data storage can be loaded via setting
* spark.shuffle.io.plugin.class.
* <code>spark.shuffle.sort.io.plugin.class</code>.
* @since 3.0.0
*/
@Private
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@HyukjinKwon HyukjinKwon Aug 1, 2019

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Question from SPARK-28568. Is it an API or not? Looks so given the PR description. @Private is:

  • This should be used only when the standard Scala / Java means of protecting classes are
  • insufficient. In particular, Java has no equivalent of private[spark], so we use this annotation
  • in its place.

So @Private doesn't look like for APIs. Shall we change it to @Unstable (maybe with an explicit warning)?

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@squito squito Aug 1, 2019

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@HyukjinKwon it'll all eventually be @Experimental, but we decided to start by making it @Private just in case spark 3.0 gets released in the middle. (discussed here: #25007 (comment))

Looks like we forgot to file a follow up jira about that, I just filed https://issues.apache.org/jira/browse/SPARK-28592

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@HyukjinKwon HyukjinKwon Aug 2, 2019

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Ah, okie. That's good.
My impression was that @Unstable guarantees less than @Experimental. Maybe we can consider this point as well later.

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