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Posted to issues@flink.apache.org by GitBox <gi...@apache.org> on 2020/04/14 05:43:38 UTC
[GitHub] [flink] dianfu opened a new pull request #11724:
[FLINK-16486][python][docs] Add documentation for vectorized Python UDF
dianfu opened a new pull request #11724: [FLINK-16486][python][docs] Add documentation for vectorized Python UDF
URL: https://github.com/apache/flink/pull/11724
## What is the purpose of the change
*This pull request add documentation for vectorized Python UDF.*
## Brief change log
- *Add documentation `vectorized_python_udfs.md` for vectorized Python UDF*
## Verifying this change
This change is a documentation rework without any test coverage.
## Does this pull request potentially affect one of the following parts:
- Dependencies (does it add or upgrade a dependency): (no)
- The public API, i.e., is any changed class annotated with `@Public(Evolving)`: (no)
- The serializers: (no)
- The runtime per-record code paths (performance sensitive): (no)
- Anything that affects deployment or recovery: JobManager (and its components), Checkpointing, Kubernetes/Yarn/Mesos, ZooKeeper: (no)
- The S3 file system connector: (no)
## Documentation
- Does this pull request introduce a new feature? (no)
- If yes, how is the feature documented? (not applicable)
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[GitHub] [flink] hequn8128 commented on issue #11724:
[FLINK-16486][python][docs] Add documentation for vectorized Python UDF
Posted by GitBox <gi...@apache.org>.
hequn8128 commented on issue #11724: [FLINK-16486][python][docs] Add documentation for vectorized Python UDF
URL: https://github.com/apache/flink/pull/11724#issuecomment-614389067
@dianfu Thanks a lot for the update. Merging...
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[GitHub] [flink] hequn8128 commented on a change in pull request #11724:
[FLINK-16486][python][docs] Add documentation for vectorized Python UDF
Posted by GitBox <gi...@apache.org>.
hequn8128 commented on a change in pull request #11724: [FLINK-16486][python][docs] Add documentation for vectorized Python UDF
URL: https://github.com/apache/flink/pull/11724#discussion_r408595195
##########
File path: docs/dev/table/python/vectorized_python_udfs.md
##########
@@ -0,0 +1,62 @@
+---
+title: "Vectorized User-defined Functions"
+nav-parent_id: python_tableapi
+nav-pos: 30
+---
+<!--
+Licensed to the Apache Software Foundation (ASF) under one
+or more contributor license agreements. See the NOTICE file
+distributed with this work for additional information
+regarding copyright ownership. The ASF licenses this file
+to you under the Apache License, Version 2.0 (the
+"License"); you may not use this file except in compliance
+with the License. You may obtain a copy of the License at
+
+ http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing,
+software distributed under the License is distributed on an
+"AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+KIND, either express or implied. See the License for the
+specific language governing permissions and limitations
+under the License.
+-->
+
+Vectorized user-defined functions are functions which are executed by transferring a batch of elements between JVM and Python VM in Arrow columnar format.
Review comment:
Also add some descriptions about the advantages of the vectorized udfs over regular udfs?
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[GitHub] [flink] flinkbot edited a comment on issue #11724:
[FLINK-16486][python][docs] Add documentation for vectorized Python UDF
Posted by GitBox <gi...@apache.org>.
flinkbot edited a comment on issue #11724: [FLINK-16486][python][docs] Add documentation for vectorized Python UDF
URL: https://github.com/apache/flink/pull/11724#issuecomment-613241606
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[GitHub] [flink] flinkbot edited a comment on issue #11724:
[FLINK-16486][python][docs] Add documentation for vectorized Python UDF
Posted by GitBox <gi...@apache.org>.
flinkbot edited a comment on issue #11724: [FLINK-16486][python][docs] Add documentation for vectorized Python UDF
URL: https://github.com/apache/flink/pull/11724#issuecomment-613241606
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[GitHub] [flink] flinkbot edited a comment on issue #11724:
[FLINK-16486][python][docs] Add documentation for vectorized Python UDF
Posted by GitBox <gi...@apache.org>.
flinkbot edited a comment on issue #11724: [FLINK-16486][python][docs] Add documentation for vectorized Python UDF
URL: https://github.com/apache/flink/pull/11724#issuecomment-613241606
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[GitHub] [flink] hequn8128 commented on a change in pull request #11724:
[FLINK-16486][python][docs] Add documentation for vectorized Python UDF
Posted by GitBox <gi...@apache.org>.
hequn8128 commented on a change in pull request #11724: [FLINK-16486][python][docs] Add documentation for vectorized Python UDF
URL: https://github.com/apache/flink/pull/11724#discussion_r408698992
##########
File path: docs/dev/table/python/vectorized_python_udfs.md
##########
@@ -0,0 +1,65 @@
+---
+title: "Vectorized User-defined Functions"
+nav-parent_id: python_tableapi
+nav-pos: 30
+---
+<!--
+Licensed to the Apache Software Foundation (ASF) under one
+or more contributor license agreements. See the NOTICE file
+distributed with this work for additional information
+regarding copyright ownership. The ASF licenses this file
+to you under the Apache License, Version 2.0 (the
+"License"); you may not use this file except in compliance
+with the License. You may obtain a copy of the License at
+
+ http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing,
+software distributed under the License is distributed on an
+"AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+KIND, either express or implied. See the License for the
+specific language governing permissions and limitations
+under the License.
+-->
+
+Vectorized Python user-defined functions are functions which are executed by transferring a batch of elements between JVM and Python VM in Arrow columnar format.
+The performance of vectorized Python user-defined functions are usually much higher than non-vectorized Python user-defined functions as the serialization/deserialization
+overhead is much reduced. Besides, users could leverage the popular Python libraries such as Pandas, Numpy, etc for the vectorized Python user-defined functions implementation.
+These Python libraries are highly optimized and provide high-performance data structures and functions. It shares the similar way as the
+[non-vectorized user-defined functions]({{ site.baseurl }}/dev/table/python/python_udfs.html) on how to define vectorized user-defined functions.
+Users only need to add an extra parameter `udf_type="pandas"` in the decorator `udf` to mark it as a vectorized user-defined function.
+
+**NOTE:** Python UDF execution requires Python version (3.5, 3.6 or 3.7) with PyFlink installed. It's required on both the client side and the cluster side.
+
+* This will be replaced by the TOC
+{:toc}
+
+## Vectorized Scalar Functions
+
+Vectorized Python scalar functions take pandas.Series as the inputs and return a pandas.Series of the same length as the output.
Review comment:
to \`pandas.Series\`. Also note for other places.
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[GitHub] [flink] flinkbot edited a comment on issue #11724:
[FLINK-16486][python][docs] Add documentation for vectorized Python UDF
Posted by GitBox <gi...@apache.org>.
flinkbot edited a comment on issue #11724: [FLINK-16486][python][docs] Add documentation for vectorized Python UDF
URL: https://github.com/apache/flink/pull/11724#issuecomment-613241606
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[GitHub] [flink] flinkbot edited a comment on issue #11724:
[FLINK-16486][python][docs] Add documentation for vectorized Python UDF
Posted by GitBox <gi...@apache.org>.
flinkbot edited a comment on issue #11724: [FLINK-16486][python][docs] Add documentation for vectorized Python UDF
URL: https://github.com/apache/flink/pull/11724#issuecomment-613241606
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[GitHub] [flink] hequn8128 merged pull request #11724:
[FLINK-16486][python][docs] Add documentation for vectorized Python UDF
Posted by GitBox <gi...@apache.org>.
hequn8128 merged pull request #11724: [FLINK-16486][python][docs] Add documentation for vectorized Python UDF
URL: https://github.com/apache/flink/pull/11724
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[GitHub] [flink] dianfu commented on issue #11724:
[FLINK-16486][python][docs] Add documentation for vectorized Python UDF
Posted by GitBox <gi...@apache.org>.
dianfu commented on issue #11724: [FLINK-16486][python][docs] Add documentation for vectorized Python UDF
URL: https://github.com/apache/flink/pull/11724#issuecomment-613883788
@hequn8128 Thanks for the review. Updated the PR.
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[GitHub] [flink] dianfu commented on issue #11724:
[FLINK-16486][python][docs] Add documentation for vectorized Python UDF
Posted by GitBox <gi...@apache.org>.
dianfu commented on issue #11724: [FLINK-16486][python][docs] Add documentation for vectorized Python UDF
URL: https://github.com/apache/flink/pull/11724#issuecomment-613924469
@hequn8128 Thanks for the review. Updated the PR.
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[GitHub] [flink] flinkbot edited a comment on issue #11724:
[FLINK-16486][python][docs] Add documentation for vectorized Python UDF
Posted by GitBox <gi...@apache.org>.
flinkbot edited a comment on issue #11724: [FLINK-16486][python][docs] Add documentation for vectorized Python UDF
URL: https://github.com/apache/flink/pull/11724#issuecomment-613241606
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* 5acec4bb31966ec054331a629ce51b616b7a020b Travis: [SUCCESS](https://travis-ci.com/github/flink-ci/flink/builds/160156448) Azure: [FAILURE](https://dev.azure.com/rmetzger/5bd3ef0a-4359-41af-abca-811b04098d2e/_build/results?buildId=7430)
* 8e0eaaf59763bb0b64a4798e7f243b1c9bf12758 Travis: [PENDING](https://travis-ci.com/github/flink-ci/flink/builds/160340796) Azure: [PENDING](https://dev.azure.com/rmetzger/5bd3ef0a-4359-41af-abca-811b04098d2e/_build/results?buildId=7498)
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[GitHub] [flink] flinkbot commented on issue #11724:
[FLINK-16486][python][docs] Add documentation for vectorized Python UDF
Posted by GitBox <gi...@apache.org>.
flinkbot commented on issue #11724: [FLINK-16486][python][docs] Add documentation for vectorized Python UDF
URL: https://github.com/apache/flink/pull/11724#issuecomment-613241606
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[GitHub] [flink] hequn8128 commented on a change in pull request #11724:
[FLINK-16486][python][docs] Add documentation for vectorized Python UDF
Posted by GitBox <gi...@apache.org>.
hequn8128 commented on a change in pull request #11724: [FLINK-16486][python][docs] Add documentation for vectorized Python UDF
URL: https://github.com/apache/flink/pull/11724#discussion_r408594055
##########
File path: docs/dev/table/python/vectorized_python_udfs.md
##########
@@ -0,0 +1,62 @@
+---
+title: "Vectorized User-defined Functions"
+nav-parent_id: python_tableapi
+nav-pos: 30
+---
+<!--
+Licensed to the Apache Software Foundation (ASF) under one
+or more contributor license agreements. See the NOTICE file
+distributed with this work for additional information
+regarding copyright ownership. The ASF licenses this file
+to you under the Apache License, Version 2.0 (the
+"License"); you may not use this file except in compliance
+with the License. You may obtain a copy of the License at
+
+ http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing,
+software distributed under the License is distributed on an
+"AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+KIND, either express or implied. See the License for the
+specific language governing permissions and limitations
+under the License.
+-->
+
+Vectorized user-defined functions are functions which are executed by transferring a batch of elements between JVM and Python VM in Arrow columnar format.
+It shares the similar way as the [non-vectorized user-defined functions]({{ site.baseurl }}/dev/table/python/python_udfs.html) on how to
+define vectorized user-defined functions. Users only need to add an extra parameter udf_type="pandas" in the decorator `udf` to mark it as a vectorized user-defined function.
Review comment:
change to \`udf_type="pandas"\`
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[GitHub] [flink] flinkbot edited a comment on issue #11724:
[FLINK-16486][python][docs] Add documentation for vectorized Python UDF
Posted by GitBox <gi...@apache.org>.
flinkbot edited a comment on issue #11724: [FLINK-16486][python][docs] Add documentation for vectorized Python UDF
URL: https://github.com/apache/flink/pull/11724#issuecomment-613241606
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## CI report:
* 5acec4bb31966ec054331a629ce51b616b7a020b Travis: [SUCCESS](https://travis-ci.com/github/flink-ci/flink/builds/160156448) Azure: [FAILURE](https://dev.azure.com/rmetzger/5bd3ef0a-4359-41af-abca-811b04098d2e/_build/results?buildId=7430)
* 8e0eaaf59763bb0b64a4798e7f243b1c9bf12758 UNKNOWN
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[GitHub] [flink] flinkbot edited a comment on issue #11724:
[FLINK-16486][python][docs] Add documentation for vectorized Python UDF
Posted by GitBox <gi...@apache.org>.
flinkbot edited a comment on issue #11724: [FLINK-16486][python][docs] Add documentation for vectorized Python UDF
URL: https://github.com/apache/flink/pull/11724#issuecomment-613241606
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[GitHub] [flink] flinkbot commented on issue #11724:
[FLINK-16486][python][docs] Add documentation for vectorized Python UDF
Posted by GitBox <gi...@apache.org>.
flinkbot commented on issue #11724: [FLINK-16486][python][docs] Add documentation for vectorized Python UDF
URL: https://github.com/apache/flink/pull/11724#issuecomment-613238037
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[GitHub] [flink] flinkbot edited a comment on issue #11724:
[FLINK-16486][python][docs] Add documentation for vectorized Python UDF
Posted by GitBox <gi...@apache.org>.
flinkbot edited a comment on issue #11724: [FLINK-16486][python][docs] Add documentation for vectorized Python UDF
URL: https://github.com/apache/flink/pull/11724#issuecomment-613241606
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