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


ciao -

" ( cd /lib ; ln -s ) "

Stefan Traby Linux/ia32 fax: +43-3133-6107-9
Mitterlasznitzstr. 13 Linux/alpha phone: +43-3133-6107-2
8302 Nestelbach Linux/sparc
Austria mailto://
Europe mailto://
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to
Please read the FAQ at

 \ /
  Last update: 2005-03-22 12:52    [W:0.914 / U:0.068 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site