Messages in this thread |  | | | From | "Al Boldi" <> | | Subject | RE: reiser4 plugins | | Date | Tue, 28 Jun 2005 09:37:24 +0300 |
Hans Reiser wrote: > Steve, there is a remark about XFS below which you are going to be > more expert on. > > Theodore Ts'o wrote: > >> >>XFS has similar issues where it assumes that hardware has powerfail >>interrupts, and that the OS can use said powerfail interrupt to stop >>DMA's in its tracks on an power failure, so that you don't have >>garbage written to key filesystem data structures when the memory >>starts suffering from the dropping voltage on the power bus faster >>than the DMA engine or the disk drives. So XFS is a great filesystem >>--- but you'd better be running it on a UPS, or on a system which has >>power fail interrupts and an OS that knows what to do. Ext3, because >>it does physical block journalling, does not suffer from this problem. >>(Yes, Resierfs uses logical journalling as well, so it suffers from >>the same problem.) >>
True now, not so around 2.4.20 when XFS was rock-solid. I think they tried to improve on performance and broke something. I wish they would fix that because it forced me back to ext3, as in consistency over performance any time.
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