Messages in this thread | | | Date | Tue, 18 Jul 2000 16:56:16 +0300 | From | Matti Aarnio <> | Subject | Re: ext3-0.0.2e released |
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( This really should be on linux-fsdevel@vger.rutgers.edu list )
On Tue, Jul 18, 2000 at 03:40:30PM +0200, Rask Ingemann Lambertsen wrote: > On 06-Jul-00 20:32:35, Theodore Y. Ts'o wrote: > > > >Multics operating system was able to run its filesystem recovery tool > >while the filesystem was online. > > A defragmenter that works while the fs is online would be nice too. > SmartFileSystem on the Amiga has one, and the fs remains fully functional > while the defragmenter runs. You only notice a performance decrease.
Just to give people some ideas regarding it..
- VMS as had several defragmenter programs running in parallel with live system at least as early as 1986.
- Doing orderly locking of critical datablocks might solve the issue; "just" some supporting IOCTLs so that suitably privileged process can do inode/superblock/bitmap-block/whatnot read/modify/write operations within the filesystem.
- Doing those lockings via a fd (e.g. root directory fd of the mounted filesystem) would allow file closing (program crash, or whatever reason) to clean up afterwards.
> Regards, > | Rask Ingemann Lambertsen | E-mail: mailto:rask@kampsax.k-net.dk |
/Matti Aarnio <matti.aarnio@sonera.fi>
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