Re: [RFC][PATCH] ChunkFS: fs fission for faster fsck

[Jeff Dike]

On Wed, Apr 25, 2007 at 03:47:10PM -0700, Valerie Henson wrote:
> Actually, there is an upper limit on the number of continuation
> inodes.  Each file can have a maximum of one continuation inode per
> chunk. (This is why we need to support sparse files.)

How about this case:

	Growing file starts in chunk A.
	Overflows into chunk B.
	Delete file in chunk A.
	Growing file overflows chunk B and spots new free space in
chunk A (and nothing anywhere else)
	Overflows into chunk A
	Delete file in chunk B.
	Overflow into chunk B again.

Maybe this is not realistic, but in the absence of a mechanism to pull
data back from an overflow chunk, it seems at least a theoretical
possibility that there could be > 1 continuation inodes per file per
chunk.

				Jeff

-- 
Work email - jdike at linux dot intel dot com
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