GitHub user cshuo edited a comment on the discussion: Use ZSTD as the default compression codec for Parquet files
@danny0405 I think these are two separate concerns. * To switch the default to ZSTD, the memory leak in older parquet-java versions must be addressed. As mentioned earlier, we can follow Iceberg’s workaround: [apache/iceberg#5681](https://github.com/apache/iceberg/pull/5681). * We should also consider MOR log write throughput. In a preliminary benchmark on Alibaba Cloud EMR, for a [MOR table](https://github.com/cshuo/streaming-benchmark/blob/main/queries/q2.sql) with 20 string fields, with ZSTD enabled, native log write throughput was only about 70% of inline log throughput. To improve throughput, we need to tune compression parameters specifically for native log files rather than keeping them fully aligned with base files. Actually, different compression policies across levels or file lifecycles are common in LSM storage. RocksDB, TiKV and Paimon support per-level compression, while Cassandra and HBase differentiate compression between flush and compaction. GitHub link: https://github.com/apache/hudi/discussions/19615#discussioncomment-18000409 ---- This is an automatically sent email for [email protected]. To unsubscribe, please send an email to: [email protected]
