Subject: Re: SGI will freely license its XFS
To: Oleg Polyanski <>
From: Manuel Bouyer <>
List: current-users
Date: 05/21/1999 03:20:20
On Thu, May 20, 1999 at 09:23:45PM +0400, Oleg Polyanski wrote:
> 	they are very different. xfs is an ordinary (but extremely optimized
> for high speed data access) journaling file system and stores the transaction 
> log somewhere on the disk (in other slice of disk or in the slice of another
> disk or inside the filesystem itself). lfs is a log-structured file system,
> there is no transaction log or data - file system itself is a log. lfs is
> good in many terms but unfortunately it is write only file system; data
> reading without notable performance impact is impossible. lfs is an example
> of excellent research work but in real life it is unusable.

Hum, the few tests I ran on LFS showed it to be faster than ffs for reading
as well. Do you have some numbers ?

Manuel Bouyer <>