Question

The logs in a log structured file system differ from journaling in that:

1. Logs are the primary storage structure of the file system.
2. Logs are cleared after the data writes associated with them are complete.
3. Logs improve the integrity of the file system.
4. A sequence of logs represents an indivisible transaction.

Answer 1

Something seems to be missing from the question statement. But basically a difference b/w the logs in a log structured file system and journaling system is asked. And options are given.

So basic difference b/w the logs are that in journaling system are cleared after the data writes associate with them are completed, whereas in log structured file system new blocks of are allocated for writing logs and garbage collector looks after the older logs. Hence, Option (B) is correct.