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

[Jeff Garzik]

Theodore Tso wrote:
> On Fri, Jun 09, 2006 at 09:43:14PM -0400, Jeff Garzik wrote:
> > > ???  Can you please be specific in what the performance penalty is, and
> > > what specifically is "not sized optimally" after a resize?  How exactly
> > > does inode allocation strategy relate to anything at all to online 
> > > resizing.
> > Inodes per group / inode blocks per group, as I've already stated.
>
> Inodes per group and inode blocks per group are maintained
> across an online resize.

That's the problem I'm pointing out.


> So there is no difference in inodes per
> group for a filesystem created at size S1 and resized to size S2
> (using either an on-line or off-line resize), and a filesystem which
> is created to be size S2.

Trivial to prove false, by your statement above if nothing else.  But 
anyway:
Run mke2fs on a blkdev of size 500MB, and one of 500GB.  Note values.
Now resize blkdev formatted for size 500MB to 500GB, and note differences.

	Jeff



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