Re-add iceberg bounded source; test splitting by kennknowles · Pull Request #30805 · apache/beam

kennknowles · 2024-03-29T19:36:35Z

Currently we have failing in the exhaustive splitting, but I would also like feedback early.

This is exactly #30797 plus one commit, so if you click on just the last commit you should be able to see just the read/source diff

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kennknowles · 2024-03-29T19:36:41Z

R: @chamikaramj

github-actions · 2024-03-29T19:37:48Z

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kennknowles · 2024-03-29T19:54:30Z

The failure is in the basic reading of data - none is read. I'll try to grok things and see about that. Still interested in commentary on the approaches here.

chamikaramj

Thanks!

chamikaramj · 2024-04-01T18:16:55Z

sdks/java/io/iceberg/src/main/java/org/apache/beam/io/iceberg/IcebergIO.java

Noting that this also has Write stuff but I'm ignoring those for this review.

Thanks for noticing. I will revert any added write stuff in this PR.

chamikaramj · 2024-04-01T18:18:34Z

sdks/java/io/iceberg/src/main/java/org/apache/beam/io/iceberg/IcebergIO.java

Seems like we are missing the Read transform ?

Will do soon. I realize all the tests are a vanilla Read.from(IcebergBoundedSource)

chamikaramj · 2024-04-01T18:20:51Z

sdks/java/io/iceberg/src/main/java/org/apache/beam/io/iceberg/IcebergBoundedSource.java

Ideally we should use SDF but I think it would suffice to add a TODO to convert this to an SDF in the future.

chamikaramj · 2024-04-01T23:59:31Z

sdks/java/io/iceberg/src/main/java/org/apache/beam/io/iceberg/IcebergBoundedSource.java

String.valueOf(desiredBundleSizeBytes)

chamikaramj · 2024-04-02T00:20:00Z

sdks/java/io/iceberg/src/main/java/org/apache/beam/io/iceberg/IcebergBoundedSource.java

We should fail here to prevent data loss.

chamikaramj · 2024-04-02T00:49:23Z

sdks/java/io/iceberg/src/main/java/org/apache/beam/io/iceberg/CombinedScanReader.java

Update/remove comment ?

Actually I added this comment to explain why the type was fake. I reworded it.

chamikaramj · 2024-04-02T00:54:26Z

sdks/java/io/iceberg/src/main/java/org/apache/beam/io/iceberg/CombinedScanReader.java

Why are we skipping data tasks ? Was this supposed to be if (!fileTask.isDataTask()) ?

Seems like DataTasks contain actual data: https://iceberg.apache.org/javadoc/0.11.0/org/apache/iceberg/DataTask.html

I think this was obsolete code. The issue is that ScanTask is a oneof and this is checking a oneof that it is not.

sdks/java/io/iceberg/src/main/java/org/apache/beam/io/iceberg/CombinedScanReader.java

chamikaramj · 2024-04-02T00:59:07Z

sdks/java/io/iceberg/src/main/java/org/apache/beam/io/iceberg/CombinedScanReader.java

What does this mean ?

Haha it means that this was a fake implementation. I added conversions.

codecov-commenter · 2024-04-09T21:19:20Z

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 71.47%. Comparing base (b018c25) to head (21e0a47).
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@@             Coverage Diff              @@
##             master   #30805      +/-   ##
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+ Coverage     70.96%   71.47%   +0.51%     
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  Files          1257      710     -547     
  Lines        140931   104815   -36116     
  Branches       4307        0    -4307     
============================================
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+ Misses        37444    28268    -9176     
+ Partials       3480     1632    -1848

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kennknowles · 2024-04-10T01:11:46Z

Looks like there is something broke in the GHA workflow FYI just so you don't wait for that to go green. I pushed some possible fixes up for that too but I'm not sure if in this case the workflow comes from master or the PR.

chamikaramj

Thanks.

chamikaramj · 2024-04-10T15:46:49Z

sdks/java/io/iceberg/src/main/java/org/apache/beam/io/iceberg/IcebergBoundedSource.java

What will happen if the sources produced at line 104 above get re-split by the runner ?

If such sources cannot be re-split, we should have a trivial case where we just return the original source to prevent data loss.

chamikaramj · 2024-04-10T15:55:49Z

sdks/java/io/iceberg/src/main/java/org/apache/beam/io/iceberg/CombinedScanReader.java

Is it possible to also implement getFractionConsumed to support progress reporting in a meaningful way ?

I think it will be very useful for autoscaling when using this with Dataflow.

This can be in a future PR since we want to get this in by release cut.

chamikaramj · 2024-04-10T16:05:03Z

sdks/java/io/iceberg/src/test/java/org/apache/beam/io/iceberg/IcebergIOReadTest.java

Let's also add a test for splitting using SourceTestUtils.assertSourcesEqualReferenceSource.

sdks/java/io/iceberg/src/main/java/org/apache/beam/io/iceberg/SchemaAndRowConversions.java

chamikaramj · 2024-04-12T01:04:20Z

sdks/java/io/iceberg/src/main/java/org/apache/beam/io/iceberg/ScanSource.java

Also fail for the default path prevent dataloss (or just return the original source if that can be read directly).

chamikaramj · 2024-04-12T01:09:15Z

LGTM other than handling the re-splitting case above.

kennknowles

Added a test for double-splitting. To make splitting behavior clearer, I factored into two different kinds of sources.

kennknowles · 2024-04-12T14:02:05Z

sdks/java/io/iceberg/src/main/java/org/apache/beam/io/iceberg/ScanSource.java

chamikaramj

Thanks. LGTM.

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kennknowles force-pushed the iceberg-read branch from 21e0a47 to 177aea2 Compare April 9, 2024 21:18

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kennknowles force-pushed the iceberg-read branch from 177aea2 to e26cacd Compare April 9, 2024 23:11

kennknowles marked this pull request as ready for review April 10, 2024 01:03

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kennknowles force-pushed the iceberg-read branch 2 times, most recently from b53e022 to 0b5e391 Compare April 10, 2024 01:10

kennknowles force-pushed the iceberg-read branch from 0b5e391 to 37b23f7 Compare April 10, 2024 16:02

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kennknowles force-pushed the iceberg-read branch 4 times, most recently from 19037fb to a5b995a Compare April 11, 2024 18:05

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kennknowles added 2 commits April 11, 2024 14:35

Fix iceberg dependencies

631f6e7

Refactor iceberg/beam conversions for clarity

36f3228

chamikaramj reviewed Apr 12, 2024

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Re-add Iceberg bounded source; test splitting

a169e6a

kennknowles force-pushed the iceberg-read branch from a5b995a to a169e6a Compare April 12, 2024 15:22

kennknowles commented Apr 12, 2024

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sdks/java/io/iceberg/src/main/java/org/apache/beam/io/iceberg/ScanSource.java Outdated

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done

chamikaramj approved these changes Apr 12, 2024

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kennknowles merged commit 96dc16a into apache:master Apr 12, 2024

kennknowles deleted the iceberg-read branch April 13, 2024 00:56

ahmedabu98 mentioned this pull request Apr 15, 2024

Managed Transform protos & translation; Iceberg SchemaTransforms & translation #30910

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kennknowles mentioned this pull request May 21, 2024

Adding Iceberg Support #29569

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kennknowles commented Mar 29, 2024

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