From: Raymond Kelly (ray at domain phbrink.ie)
Date: Wed 06 Oct 1999 - 13:52:29 IST
I presume that the intention was to send this to the list.
Thanks for the info, it definately makes some sense now.
-------- Original Message --------
Subject: Re: [ILUG] Linux Myths. The truth can be told!
Date: Wed, 6 Oct 1999 12:47:06 GMT
From: Niall O Broin <nobroin at domain sced.esoc.esa.de>
To: ray at domain phbrink.ie
Raymond Kelly asked
> Just a quick question from the ignorant ..
> What is the difference between a Journaling & non-journaling FS
Anywhere from two minutes to an hour depending on the size of your
Oh, ok, as you're ignorant . . . .
A journalling filesystem logs (or rather journals) all changes to the
in a special file. The advantage of this is that when it's necessary to
filesystem e.g. after an unclean shutdown due to a power outage the
this very much faster. I have a 16GB ext2fs filesystem which takes >10
fsck after an unclean shutdown. In fairness, it doesn't happen very
often, but it's
a pain in the neck when it does.
Now don't anybody please bitch about the above - it's a 5 line precis
for the ignorant.
I know about journalling all data / only metadata etc. - I've Tweedie's
paper on the
desk beside me and I've read Reiser's stuff, and there's whatever's
coming from SGI.
Niall O Broin
UNIX Network Administrator nobroin at domain esoc.esa.de
Ground Systems Engineering Department Ph./Fax +49 6151 90 3619/2179
European Space Operations Centre, Darmstadt, Germany
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