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

Jeff Garzik
2006-06-09T20:04:47Z

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