THIS IS A TEST INSTANCE. ALL YOUR CHANGES WILL BE LOST!!!!

Page History

Versions Compared

Key

This line was added.
This line was removed.
Formatting was changed.

Comment: tx record types: outdated/not correct information here

...

Crash recovery involves following records writtent in WAL, it may be of 2 main types Logical & Physical

Logical records

1. Operation description - which operation we want to do. Contains operation type (create, update, delete) and (Key, Value, Version) - DataRecord
2. Transactional record - this record is marker of begin , prepare, commitprepared, and committed, or rollback transactions - (TxRecord)
3. Checkpoint record - marker of begin checkpointing (CheckpointRecord)

...