![]() If there is a power outage or kernel panic while a file is being written or appended to, the journal will indicate that the new file or appended data has not been "committed", so it will be purged by the cleanup process. This is the default on many Linux distributions. ![]() Ordered (medium risk) Only metadata is journaled file contents are not, but it's guaranteed that file contents are written to disk before associated metadata is marked as committed in the journal. In other cases, performance gets worse, because the data must be written twice-once to the journal, and once to the main part of the filesystem. ![]() Because the journal is relatively continuous on disk, this can improve performance, if the journal has enough space. Journal (lowest risk) Both metadata and file contents are written to the journal before being committed to the main file system. There are three levels of journaling available in the Linux implementation of ext3:
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |