LinuxSA Mailing list archives

  From: Mike Earnshaw <mearnshaw@bigpond.com>
  To  : Matthew Tippett" <mtippett@ticons.com.au>, "LinuxSA" <linuxsa@linuxsa.org.au>, "Mark Newton <mtippett@ticons.com.au>
  Date: Thu, 2 Sep 1999 18:16:47 +0930

Re: Journaling ??

Maybe I asked my question incorrectly :)

I was getting at a program that keeps track of "text" files etc for when you
change them. Revision control is probably a better way of asking.

Tried ls in /bin and /sbin but nothing bloodies my nose, maybe I just cant
see the wood for the trees ....

Any ideas.

TIA and sorry for the confusion

Mike


-----Original Message-----
From: Mark Newton <newton@atdot.dotat.org>
To: Matthew Tippett <mtippett@ticons.com.au>
Cc: mearnshaw@bigpond.com <mearnshaw@bigpond.com>; linuxsa@linuxsa.org.au
<linuxsa@linuxsa.org.au>
Date: Thursday, 2 September 1999 09:37
Subject: Re: Journaling ??


>Matthew Tippett wrote:
>
> > A Journaling file system is fast.
>
>... if you have enough memory :-)
>
>[ remember that the filesystem log is essentially a temporally-ordered
>  sequential datastore, with little or no optimizations for filesystem
>  block clustering, fragmentation, etc.  It's only fast if you have
>  large amounts of memory for caching, which is why (for example) XFS
>  performance on IRIX isn't all that great if you have less than 128 Mbytes
>  of RAM ]
>
>The big advantage you get from it is reliability:  Due to the presence of
>the log, filesystem operations can be rolled-back or replayed after a
>crash, making fsck unnecessary and making disk corruption a rarity.
>
>   - mark
>
>--------------------------------------------------------------------
>I tried an internal modem,                    newton@atdot.dotat.org
>     but it hurt when I walked.                          Mark Newton
>----- Voice: +61-4-1620-2223 ------------- Fax: +61-8-82231777 -----

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