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Signed-off-by: Alex Chi <iskyzh@gmail.com>
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Alex Chi
2024-01-28 21:13:10 +08:00
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mini-lsm-book/src/week3-02-snapshot-read-part-1.md
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# Snapshot Read - Memtables and Timestamps
In this chapter, you will:
* Refactor your memtable/WAL to store multiple versions of a key.
* Implement the new engine write path to assign each key a timestamp.
* Make your compaction process aware of multi-version keys.
* Implement the new engine read path to return the latest version of a key.
During the refactor, you might need to change the signature of some functions from `&self` to `self: &Arc<Self>` as necessary.
## Task 1: MemTable, Write-Ahead Log, and Read Path