Re: Delays on "first" access to a NFS mount

[Neil Brown <neilb@suse.de>]

On Wednesday March 7, simon.peter@gmx.de wrote:
> 
> I think what Tom had in mind was to stat all directories once, remember
> their values, have inotify keep an eye on 'em and whenever they change,
> update the remembered values. This way, disk access would only have to
> be done whenever something changes, which is when the disk is spun up
> anyway.

There is certainly some sense in that approach.  I don't think
inotify is needed though.  The only part of the stat information we
are interested in is major/minor/inode numbers, and they don't change.

We could possibly stat everything that seems to be interesting once
and store the details.
When a request comes in, match against the records to find a path,
then double-check the path still matches.  If it does, good.  If not,
take the long way around again.

NeilBrown

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