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In: Computer Science

Use the internet to read more about journaling file systems such as NTFS, extfs2, and extfs3....

Use the internet to read more about journaling file systems such as NTFS, extfs2, and extfs3. Discuss the most significant points, including the primary advantages and disadvantages of journaling file systems.

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Expert Solution

Journaling filesystems such as NTFS, ZFS, ext2, ext3 etc consistently record metadata on log entries on a disk also called a journal, for every change that is being made to the filesystem during the disk writing process. This log files or journal helps to quickly rebuild corruptions that may happen because of occasions such as system crash or power failure. In case of a non-journal filesystem if a system crash occurs it takes a lot of time to recover and reboot the system and some inconsistency of data can’t be recovered without an expert. Some of the advantages of a journaling filesystems are as follows.

  • In case of system crash journaling filesystem is very fast in system restart and restoration process using the journal log data stored in the disk.
  • Journal filesystem is very flexible to use it has no limitation on making partitions on a disk because it does not allocate the number of nodes before a filesystem is created.

The major disadvantage of a journaling filesystem is that it requires more disk writes to create journal log data, this uses more disk space so it may affect the overall performance of filesystem.


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