Re: du with a cache for read-only dirs

[Brian J. Murrell]

On Thu, 2016-06-23 at 17:38 +0100, Pádraig Brady wrote:
> 
> I'm thinking this logic shouldn't be within du.

I can't see how it couldn't/wouldn't be.

> Perhaps a wrapper that reads such cached values if available would be
> better.

And then does what?  Gives them to du to see it's tally of the
dirs/subdirs?

> Something more general that I mentioned before in the context of file
> checksums,
> would be to have extended attributes that were auto cleared on write
> by the system, where one could cache checksums and sizes etc.

How does that avoid du from having to trawl the entire tree every time?
 I think you are just splitting hairs on whether du gets information
from directory metadata or EAs.  I'm trying to avoid descending into a
directory tree entirely by caching the results of the last descent into
it at the top of it.

Cheers,
b.

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