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test comments
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![WAL](https://user-images.githubusercontent.com/12581295/196644303-3dfac806-5193-4208-ac57-dedb0af4e53b.png)
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### Expected behavior
All files on disk should be contained in the LSM tree.
### Actual behavior
Some files are not in the LSM tree, resulting in an error.
### Steps to reproduce the behav…
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:wave: It's the LSM-tree guy again.
I've seen that QC supports a clear method, however I find that pretty destructive for my use case. As is typical with an LSM-tree, sometimes some parts of the da…
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By default, the LSM tree of a compaction group can have at most 7 levels (L0 - L6) with [base level (i.e. the first non-L0 level) size set to 512MB](https://github.com/risingwavelabs/risingwave/blob/e…
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Hudi 0.14.1
This webpage "https://hudi.apache.org/docs/timeline/" indicates that Hudi has adopted the LSM-tree structure in its Timeline starting from version 0.14.1. However, upon inspecting the s…
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Recently we have had efficiency issues related to compaction strategy. Here are some examples on top of my head:
- #16965
- Compaction tasks are not parallelized when there are large writes into cr…
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https://www.usenix.org/system/files/conference/fast16/fast16-papers-lu.pdf
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LSM 树是处理大量写入工作负载时通常使用的数据结构,通过仅执行顺序写入来优化写入路径。 LSM 树是许多数据库背后的核心数据结构,包括 [BigTable](https://cloud.google.com/bigtable)、[LevelDB](https://github.com/google/leveldb)、[Cassandra](https://cassandra.apache.org…