Messages in this thread |  | | | Date | Tue, 20 Sep 2005 17:13:25 -0700 | | From | Hans Reiser <> | | Subject | Re: I request inclusion of reiser4 in the mainline kernel |
Thanks Ted, I'll ask Vitaly to read the paper, and tell us what he thinks should be learned from it for V4.
Hans
Theodore Ts'o wrote:
>On Tue, Sep 20, 2005 at 09:51:33AM +0200, Pavel Machek wrote: > > >>Do you have working fsck for V4? Until then, you should not claim that >>users should switch. Journalling does not help you, if you have >>unexpected kernel problem or hardware trouble, fsck _is_ mandatory. >> >>Can V4 survive few hours of test below? >> >> > >The script could be improved by select random locations to damage the >filesystem, instead of hard-coding the seek=7 value. Seek=7 is good >for testing ext2/ext3 filesystems, but it may not be ideal for other >filesystems. > >Another interesting refinement would be to analyze the resulting >filesystem after it has been repaired to determine how much data could >be salvaged by the fsck program. > >There is a very interesting paper that I coincidentally just came >across today that talks about making filesystems robust against >various different forms of failures of modern disk systems. It is >going to be presented at the upcoming 2005 SOSP conference. > > http://www.cs.wisc.edu/adsl/Publications/iron-sosp05.pdf > >It's definitely worth a read. A few comments about it; first of all, >I know nothing about this modified "iron ext3" (ixt3) discussed in the >paper aside from what's the paper itself. It would be interesting to >see what they have done with it. Secondly, I _think_ sct has already >fixed the problems discussed in the paper with respect to inadequate >write squelching after an I/O failure writing to the ext3 journal, but >we need to chat with the paper's authors to confirm that, and if there >still is a problem, obviously we need to fix it. Third of all, I'll >note that the paper does takes an approving note of the fact that >Reiserfs (v3) always panic's when it detects a write fault, so for >those folks in the Reiser team who might have a persecution complex, >relax, the whole world isn't out to get you. :-) > > - Ted > > > >
- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
|  |