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Posted to issues-all@impala.apache.org by "Abhishek Rawat (JIRA)" <ji...@apache.org> on 2019/06/03 22:41:00 UTC
[jira] [Updated] (IMPALA-8617) Add support for lz4 in parquet
[ https://issues.apache.org/jira/browse/IMPALA-8617?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Abhishek Rawat updated IMPALA-8617:
-----------------------------------
Description:
Hadoop uses a native block format for LZ4 (same as parquet-mr api) which is incompatible with LZ4 block format.
As a result Parquet/LZ4 could have different block formats.
The parquet-cpp api (now Apache Arrow) uses LZ4 frame format, which is also incompatible with LZ4 block format.
The current decision is to use a format compatible with Hive, Spark and parquet-mr.
was:
Hadoop uses a native block format for LZ4 (same as parquet-mr api) which is incompatible with LZ4 block format.
As a result Parquet/LZ4 could have different block formats.
The parquet-cpp api (now Apache Arrow) uses parquet frame format, which is also incompatible with Parquet block format.
The current decision is to use a format compatible with Hive, Spark and parquet-mr.
> Add support for lz4 in parquet
> ------------------------------
>
> Key: IMPALA-8617
> URL: https://issues.apache.org/jira/browse/IMPALA-8617
> Project: IMPALA
> Issue Type: Improvement
> Components: Backend
> Reporter: Abhishek Rawat
> Assignee: Abhishek Rawat
> Priority: Major
> Labels: parquet
>
> Hadoop uses a native block format for LZ4 (same as parquet-mr api) which is incompatible with LZ4 block format.
> As a result Parquet/LZ4 could have different block formats.
> The parquet-cpp api (now Apache Arrow) uses LZ4 frame format, which is also incompatible with LZ4 block format.
> The current decision is to use a format compatible with Hive, Spark and parquet-mr.
>
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