Re: File System conversion -- ideas

From: Stewart Smith (
Date: Tue Jul 01 2003 - 05:15:09 EST

On Sun, Jun 29, 2003 at 03:48:06PM -0400, rmoser wrote:

> Yeppers. Also that the eventual goal (at least in my mind) is to allow
> this to be done on a running r/w filesystem safely, which isn't as tough
> a problem as it sounds.

Yes it is. In fact, it is more of a problem then you think.

Think of this simple scenario:
a script is running that downloads a kernel patch, applies it to a tree,
then renames the directory to $1-$patchname.

Half way through this, during the patch, the backup script comes through
and starts to backup the filesystem.

Now - wipe the drive clean at the end and restore it to a sane state.

Doing live things on storage systems without transactions, snapshots or
whatever you want to call them is tricky at best. resizing is going to
cause headaches.

Stewart Smith
Vice President, Linux Australia (personal:
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