[Bug 243144] ports-mgmt/pkg: size mismatch error

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=243144

--- Comment #3 from Conrad Meyer <cem at freebsd.org> ---
It's a design problem.  We know package syncs are never going to be
instantaneous, but the design of the pkg server infrastructure and client does
not allow the client to install from a consistent snapshot (or even recognize
the condition of an inconsistent sync status).

A better design would be to use content-addressed names on the server (i.e.,
some hash).  If the client gets a 404 error, it knows it has a stale index and
must re-fetch metadata (automatically).  If the client does not get a 404, it
will get exactly the file it asked for (modulo HTTP layer corruption) and the
size check will not fail anyway.

Debian talks about something like this:
http://www.chiark.greenend.org.uk/~cjwatson/blog/no-more-hash-sum-mismatch-errors.html

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