Commit log

[Terkwood]

Append

• Append to commit log before writing to memtable
• Manage tombstones
• Write TSV
• Record monotonic time

Replay

• Call CommitLog.replay() on app startup
• Read every value since the beginning of the log, and push each one into memtable.
• Read TSV
• Do not update SSTable files
• test escaping -- append doesn't bother with it. Does NimbleCSV parsing step on some values, e.g. \n?

Discard on Memtable flush

• Discard commit log on memtable flush  #53

Background

An amusing article on Commit Log from Knoldus.