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

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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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