mini_lsm/mini-lsm-book/src/week2-06-wal.md

Write-Ahead Log (WAL)

In this chapter, you will:

• Implement encoding and decoding of the write-ahead log file.
• Recover memtables from the WALs when the system restarts.

Task 1: WAL Encoding

Task 2: Write WALs

Task 3: Recover from the WALs

Test Your Understanding

• When can you tell the user that their modifications (put/delete) have been persisted?

We do not provide reference answers to the questions, and feel free to discuss about them in the Discord community.

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