Features of GFS2 Compared With GFS
GFS2 adds a number of new features which are not in GFS. Here is a summary of those features not already mentioned in the boxes to the right of this page:
- The metadata filesystem (really a different root) - see Compatibility and the GFS2 meta filesystem below
- GFS2 specific trace points have been available since kernel 2.6.32
- The XFS-style quota interface has been available in GFS2 since kernel 2.6.33
- Caching ACLs have been available in GFS2 since 2.6.33
- GFS2 supports the generation of "discard" requests for thin provisioning/SCSI TRIM requests
- GFS2 supports I/O barriers (on by default, assuming underlying device supports it. Configurable from kernel 2.6.33 and up)
- FIEMAP ioctl (to query mappings of inodes on disk)
- Splice (system call) support
- mmap/splice support for journaled files (enabled by using the same on disk format as for regular files)
- Far fewer tweekables (making set-up less complicated)
- Ordered write mode (as per ext3, GFS only has writeback mode)
Read more about this topic: GFS2
Famous quotes containing the words features of, features and/or compared:
“These, then, will be some of the features of democracy ... it will be, in all likelihood, an agreeable, lawless, particolored commonwealth, dealing with all alike on a footing of equality, whether they be really equal or not.”
—Plato (c. 427–347 B.C.)
“The features of our face are hardly more than gestures which force of habit made permanent. Nature, like the destruction of Pompeii, like the metamorphosis of a nymph into a tree, has arrested us in an accustomed movement.”
—Marcel Proust (1871–1922)
“As compared with the college politician, the real article seems like an amateur.”
—Woodrow Wilson (1856–1924)