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Posted to github@arrow.apache.org by GitBox <gi...@apache.org> on 2021/12/13 17:11:12 UTC

[GitHub] [arrow] jorgecarleitao opened a new pull request #11941: ARROW-15074: Clarified that LZ4 contains a single frame

jorgecarleitao opened a new pull request #11941:
URL: https://github.com/apache/arrow/pull/11941


   See associated discussion at https://issues.apache.org/jira/browse/ARROW-15074


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[GitHub] [arrow] ursabot edited a comment on pull request #11941: ARROW-15074: [Format] Clarify that LZ4 contains a single frame

Posted by GitBox <gi...@apache.org>.
ursabot edited a comment on pull request #11941:
URL: https://github.com/apache/arrow/pull/11941#issuecomment-999748552


   Benchmark runs are scheduled for baseline = 7e04d529ad261a6c644bdb998949c5c3cc21d195 and contender = 7baa65ced97714d0d9562c4fe74125718dae6b6e. 7baa65ced97714d0d9562c4fe74125718dae6b6e is a master commit associated with this PR. Results will be available as each benchmark for each run completes.
   Conbench compare runs links:
   [Finished :arrow_down:0.0% :arrow_up:0.0%] [ec2-t3-xlarge-us-east-2](https://conbench.ursa.dev/compare/runs/d891566b21734b34aeeaa31a644b1f42...ad53f6f9117948538adfcf95ecfac034/)
   [Scheduled] [ursa-i9-9960x](https://conbench.ursa.dev/compare/runs/23e5cf226f944a91a51028372b3abb29...fe247c970958448f9d3c1301eb4712ae/)
   [Scheduled] [ursa-thinkcentre-m75q](https://conbench.ursa.dev/compare/runs/f4662406b47c4e9a82b1fcf3bcd3c5e5...d614ea763915420db593b987b0e36ab3/)
   Supported benchmarks:
   ec2-t3-xlarge-us-east-2: Supported benchmark langs: Python. Runs only benchmarks with cloud = True
   ursa-i9-9960x: Supported benchmark langs: Python, R, JavaScript
   ursa-thinkcentre-m75q: Supported benchmark langs: C++, Java
   


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[GitHub] [arrow] github-actions[bot] commented on pull request #11941: ARROW-15074: Clarified that LZ4 contains a single frame

Posted by GitBox <gi...@apache.org>.
github-actions[bot] commented on pull request #11941:
URL: https://github.com/apache/arrow/pull/11941#issuecomment-992690141






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[GitHub] [arrow] ursabot edited a comment on pull request #11941: ARROW-15074: [Format] Clarify that LZ4 contains a single frame

Posted by GitBox <gi...@apache.org>.
ursabot edited a comment on pull request #11941:
URL: https://github.com/apache/arrow/pull/11941#issuecomment-999748552


   Benchmark runs are scheduled for baseline = 7e04d529ad261a6c644bdb998949c5c3cc21d195 and contender = 7baa65ced97714d0d9562c4fe74125718dae6b6e. 7baa65ced97714d0d9562c4fe74125718dae6b6e is a master commit associated with this PR. Results will be available as each benchmark for each run completes.
   Conbench compare runs links:
   [Finished :arrow_down:0.0% :arrow_up:0.0%] [ec2-t3-xlarge-us-east-2](https://conbench.ursa.dev/compare/runs/d891566b21734b34aeeaa31a644b1f42...ad53f6f9117948538adfcf95ecfac034/)
   [Failed :arrow_down:0.0% :arrow_up:0.0%] [ursa-i9-9960x](https://conbench.ursa.dev/compare/runs/23e5cf226f944a91a51028372b3abb29...fe247c970958448f9d3c1301eb4712ae/)
   [Failed :arrow_down:0.09% :arrow_up:0.04%] [ursa-thinkcentre-m75q](https://conbench.ursa.dev/compare/runs/f4662406b47c4e9a82b1fcf3bcd3c5e5...d614ea763915420db593b987b0e36ab3/)
   Supported benchmarks:
   ec2-t3-xlarge-us-east-2: Supported benchmark langs: Python. Runs only benchmarks with cloud = True
   ursa-i9-9960x: Supported benchmark langs: Python, R, JavaScript
   ursa-thinkcentre-m75q: Supported benchmark langs: C++, Java
   


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[GitHub] [arrow] pitrou commented on pull request #11941: ARROW-15074: [Format] Clarify that LZ4 contains a single frame

Posted by GitBox <gi...@apache.org>.
pitrou commented on pull request #11941:
URL: https://github.com/apache/arrow/pull/11941#issuecomment-996984041


   At least the C++ implementation, yes. Basically, each LZ4 frame is meant to be an independent stream, and you can streaming compression/decompression even with a single frame.


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[GitHub] [arrow] ursabot commented on pull request #11941: ARROW-15074: [Format] Clarify that LZ4 contains a single frame

Posted by GitBox <gi...@apache.org>.
ursabot commented on pull request #11941:
URL: https://github.com/apache/arrow/pull/11941#issuecomment-999748552


   Benchmark runs are scheduled for baseline = 7e04d529ad261a6c644bdb998949c5c3cc21d195 and contender = 7baa65ced97714d0d9562c4fe74125718dae6b6e. 7baa65ced97714d0d9562c4fe74125718dae6b6e is a master commit associated with this PR. Results will be available as each benchmark for each run completes.
   Conbench compare runs links:
   [Scheduled] [ec2-t3-xlarge-us-east-2](https://conbench.ursa.dev/compare/runs/d891566b21734b34aeeaa31a644b1f42...ad53f6f9117948538adfcf95ecfac034/)
   [Scheduled] [ursa-i9-9960x](https://conbench.ursa.dev/compare/runs/23e5cf226f944a91a51028372b3abb29...fe247c970958448f9d3c1301eb4712ae/)
   [Scheduled] [ursa-thinkcentre-m75q](https://conbench.ursa.dev/compare/runs/f4662406b47c4e9a82b1fcf3bcd3c5e5...d614ea763915420db593b987b0e36ab3/)
   Supported benchmarks:
   ec2-t3-xlarge-us-east-2: Supported benchmark langs: Python. Runs only benchmarks with cloud = True
   ursa-i9-9960x: Supported benchmark langs: Python, R, JavaScript
   ursa-thinkcentre-m75q: Supported benchmark langs: C++, Java
   


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[GitHub] [arrow] pitrou commented on a change in pull request #11941: ARROW-15074: [Format] Clarify that LZ4 contains a single frame

Posted by GitBox <gi...@apache.org>.
pitrou commented on a change in pull request #11941:
URL: https://github.com/apache/arrow/pull/11941#discussion_r768634474



##########
File path: format/Message.fbs
##########
@@ -70,7 +70,7 @@ enum BodyCompressionMethod:byte {
 /// bodies. Intended for use with RecordBatch but could be used for other
 /// message types
 table BodyCompression {
-  /// Compressor library
+  /// Compressor library. Note that for LZ4_FRAME, it must contain a single frame

Review comment:
       ```suggestion
     /// Compressor library.
     /// For LZ4_FRAME, each compressed buffer must consist of a single frame.
   ```




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[GitHub] [arrow] emkornfield commented on pull request #11941: ARROW-15074: [Format] Clarify that LZ4 contains a single frame

Posted by GitBox <gi...@apache.org>.
emkornfield commented on pull request #11941:
URL: https://github.com/apache/arrow/pull/11941#issuecomment-996928111


   Why is this the case?  Is this just adapting what implementations currently do?


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[GitHub] [arrow] pitrou closed pull request #11941: ARROW-15074: [Format] Clarify that LZ4 contains a single frame

Posted by GitBox <gi...@apache.org>.
pitrou closed pull request #11941:
URL: https://github.com/apache/arrow/pull/11941


   


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[GitHub] [arrow] jorgecarleitao commented on a change in pull request #11941: ARROW-15074: [Format] Clarify that LZ4 contains a single frame

Posted by GitBox <gi...@apache.org>.
jorgecarleitao commented on a change in pull request #11941:
URL: https://github.com/apache/arrow/pull/11941#discussion_r771126691



##########
File path: format/Message.fbs
##########
@@ -70,7 +70,7 @@ enum BodyCompressionMethod:byte {
 /// bodies. Intended for use with RecordBatch but could be used for other
 /// message types
 table BodyCompression {
-  /// Compressor library
+  /// Compressor library. Note that for LZ4_FRAME, it must contain a single frame

Review comment:
       Good one. Committed. Thanks!




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[GitHub] [arrow] ursabot edited a comment on pull request #11941: ARROW-15074: [Format] Clarify that LZ4 contains a single frame

Posted by GitBox <gi...@apache.org>.
ursabot edited a comment on pull request #11941:
URL: https://github.com/apache/arrow/pull/11941#issuecomment-999748552


   Benchmark runs are scheduled for baseline = 7e04d529ad261a6c644bdb998949c5c3cc21d195 and contender = 7baa65ced97714d0d9562c4fe74125718dae6b6e. 7baa65ced97714d0d9562c4fe74125718dae6b6e is a master commit associated with this PR. Results will be available as each benchmark for each run completes.
   Conbench compare runs links:
   [Finished :arrow_down:0.0% :arrow_up:0.0%] [ec2-t3-xlarge-us-east-2](https://conbench.ursa.dev/compare/runs/d891566b21734b34aeeaa31a644b1f42...ad53f6f9117948538adfcf95ecfac034/)
   [Scheduled] [ursa-i9-9960x](https://conbench.ursa.dev/compare/runs/23e5cf226f944a91a51028372b3abb29...fe247c970958448f9d3c1301eb4712ae/)
   [Failed :arrow_down:0.09% :arrow_up:0.04%] [ursa-thinkcentre-m75q](https://conbench.ursa.dev/compare/runs/f4662406b47c4e9a82b1fcf3bcd3c5e5...d614ea763915420db593b987b0e36ab3/)
   Supported benchmarks:
   ec2-t3-xlarge-us-east-2: Supported benchmark langs: Python. Runs only benchmarks with cloud = True
   ursa-i9-9960x: Supported benchmark langs: Python, R, JavaScript
   ursa-thinkcentre-m75q: Supported benchmark langs: C++, Java
   


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[GitHub] [arrow] pitrou edited a comment on pull request #11941: ARROW-15074: [Format] Clarify that LZ4 contains a single frame

Posted by GitBox <gi...@apache.org>.
pitrou edited a comment on pull request #11941:
URL: https://github.com/apache/arrow/pull/11941#issuecomment-996984041


   At least the C++ implementation, yes. Basically, each LZ4 frame is meant to be an independent stream, and you can do streaming compression/decompression even with a single frame.


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