Peidian Li created PARQUET-2152: ----------------------------------- Summary: zstd compressor and decompressor use the same configuration Key: PARQUET-2152 URL: https://issues.apache.org/jira/browse/PARQUET-2152 Project: Parquet Issue Type: Bug Components: parquet-mr Affects Versions: 1.12.2 Reporter: Peidian Li
I use spark to rewrite the parquet files that are compressed by zstd. And the parquet version isĀ 1.12.2. I want to read the parquet files compressed by level 3 and compress them on another level. But the level can't be changed. After I check the source, I found the problem was the codec was cached, and the configuration will not be updated: [https://github.com/apache/parquet-mr/blob/master/parquet-hadoop/src/main/java/org/apache/parquet/hadoop/CodecFactory.java#L144] [https://github.com/apache/parquet-mr/blob/master/parquet-hadoop/src/main/java/org/apache/parquet/hadoop/CodecFactory.java#L226] I think the problem is important. I found it when I try to use a different level to compaction the files in the iceberg table. Asynchronous rewriting with a higher level can lead to higher compression ratio. This is important to save storage costs. -- This message was sent by Atlassian Jira (v8.20.7#820007)