Re: [PATCH v2] d_ino considered harmful

[J. R. Okajima]

David Dillow:
> For example, our main Lustre scratch space has over 285 million files in
> it, and using find -inum takes over 72 hours to walk the tree using
	:::
> Using ne2scan -- which uses libext2fs and combines the inode scan and
> the name lookup -- takes over 48 hours to generate a list of candidate
> files for the purge example. With an optimized inode scan and the custom
	:::

While I've never heard of ne2scan, I am interested in this simplified
problem such as "find the pathname(s) from an inum in a huge fs."
Is ne2scan essentially equivalent to "debugfs ncheck inum"?

About Valeris's patch, as long as "ls -i" is useful/helpful,
> +	/* Use of d_ino without st_dev is always buggy. */
is not true.


J. R. Okajima

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/