update progress

Signed-off-by: Alex Chi Z <iskyzh@gmail.com>
2024-01-23 14:54:16 +08:00
parent 016c6ccadc
commit 1c23d43d05
2 changed files with 4 additions and 2 deletions
--- a/mini-lsm-book/src/week2-03-tiered.md
+++ b/mini-lsm-book/src/week2-03-tiered.md
@@ -19,6 +19,8 @@ The tiered compaction we talk about in this chapter is the same as RocksDB's uni

 ## Task 2: Integrate with the Read Path

+As tiered compaction does not use the L0 level of the LSM state, you should directly flush your memtables to a new tier instead of as an L0 SST. You can use `self.compaction_controller.flush_to_l0()` to know whether to flush to L0. You may use the first output SST id as the level/tier id for your new sorted run.
+
 ## Test Your Understanding

 * What are the pros/cons of universal compaction compared with simple leveled/tiered compaction?