Re: [Ext2-devel] [RFC 0/13] extents and 48bit ext3

[Jeff Garzik <jeff@garzik.org>]

Theodore Tso wrote:
> On Fri, Jun 09, 2006 at 02:51:55PM -0400, Jeff Garzik wrote:
> > ext3 is already essentially xiafs-on-life-support, when you consider 
> > today's large storage systems and today's filesystem technology.  Just 
> > look at the ugly hacks needed to support expanding an ext3 filesystem 
> > online.
>
> And what ugly hacks are you talking about?  It's actually quite clean;
> with the latest e2fsprogs, you use the same command (resize2fs) for
> doing both online and offline resizing.

Consider a blkdev of size S1.  Using LVM we increase that value under 
the hood to size S2, where S2 > S1.  We perform an online resize from 
size S1 to S2.  The size and alignment of any new groups added will 
different from the non-resize case, where mke2fs was run directly on a 
blkdev of size S2.

	Jeff



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