On Sat, 10 Dec 2005 at 13:14 (-0700), Michael Loftis wrote: > --On December 10, 2005 9:06:46 PM +0100 Marc-Jano Knopp <pub_ml_lvm@marc-jano.de> wrote: > >On Sat, 10 Dec 2005 at 13:03 (-0700), Michael Loftis wrote: > >>--On December 10, 2005 8:48:27 PM +0100 Marc-Jano Knopp > >><pub_ml_lvm@marc-jano.de> wrote: > >>> On Sat, 10 Dec 2005 at 14:38 (-0500), Mag Gam wrote: [Resizing of file systems] [...] > ReiserFS has hot expansion capabilities, but no (yet?) hot shrinking > capabilities. One of the reasons it has these features and ext2/3 does not > is because ext2/3 are very old filesystems designed on a different > mentality of a static filesystem. On-line expansion of ext2 based > filesystems is an extremely complicated venture, it might honestly even be > impossible. > > ReiserFS has the advantage here because it doesn't necessarily pre-write > out a lot of filesystem meta-information (superblocks, inodes, bitmaps, > etc), instead these structures are entirely dynamic to begin with, so > enlarging them at runtime is trivial, requires a very short lock and a > change to a few numbers. Ext2 resizing requires actually rewriting a lot > of filesystem metadata. Thanks for the detailled explanation! Yes, I would *love* to use a totally new file system with a new, dynamic, good design, but - just as many others - had my experiences with ReiserFS and it will take a *lot* of time for ReiserFS to restore confidence. So for now, I'll probably stay with ext3, with which I had no problems so far. JFS/XFS should also both be capable of growing, XFS of online-growth, IIRC. Gruß Marc-Jano _______________________________________________ linux-lvm mailing list linux-lvm@redhat.com https://www.redhat.com/mailman/listinfo/linux-lvm read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/
