lkml.org 
[lkml]   [2001]   [Jan]   [6]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: Journaling: Surviving or allowing unclean shutdown?


On Saturday, January 06, 2001 09:09:51 PM +0100 Stefan Traby
<stefan@hello-penguin.com> wrote:

> On Sat, Jan 06, 2001 at 08:57:26PM +0100, Marc Lehmann wrote:
>
>> reply. Sure, you can do virtual log replays, but for example the reiserfs
>> log is currently 32mb. Pinning down that much memory for a virtual log
>> reply is not possible on low-memory machines.
>
> Nobody with working brain would read it completely into memory.
> One just put the block-# that are in the journal into a hash-table
> and read the block out of the journal when it's requested.
> Because there may be multiple copies of the same block in the
> journal, one should take the newest one that can be found in
> the last commited transaction.
>
> IMHO Chris Mason already wrote such code, at least he talked about
> it...
>
Talked about it, but never wrote it. However, I know there was code to do
this for grub, I'm not sure if it ever made it into their releases.

-chris

-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2005-03-22 12:52    [W:0.087 / U:1.892 seconds]
©2003-2018 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site