Date: Wed, 01 Jul 1998 16:37:33 -0700 From: "Jordan K. Hubbard" <jkh@time.cdrom.com> To: Archie Cobbs <archie@whistle.com> Cc: hackers@FreeBSD.ORG Subject: Re: Anyone interested in an "interesting" project idea? Message-ID: <15323.899336253@time.cdrom.com> In-Reply-To: Your message of "Wed, 01 Jul 1998 10:26:56 PDT." <199807011726.KAA10777@bubba.whistle.com>
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> Jordan K. Hubbard writes:
> > typedef struct _pid_t { u_int hostid : 8; u_int pid : 24; } pid_t;
>
> Hmm.. it may be worth reading, e.g., the papers from the Sprite
> project (headed by John Osterhout) on their process migration system
> where process would dynamically move from host to host to balance
> out the load.
I have. :-) I used to work just 4 floors down from John in the same
building, and one evening I wandered up there and had a stack of
sprite documentation literally 2 feet high bestowed upon me by one of
the grad students working on it. I read through most of it and was
favorably impressed by much of what they'd done but, as you already
correctly surmise, it was quite complicated.
What I'm suggesting is very deliberately limited in scope.
Again, I'm not trying to achieve "true clustering", simply
trying to make one aspect of administration more transparent.
What Ron has also suggested with his shared /proc paradigm looks
interesting, though I'm not sure if I'd want to look at all the nodes
in my cluster by matching a wildcard expression on some number of
remote /procs. :) I think simplicity and minimum change to existing
services is the key here in making incremental improvements to
FreeBSD's support [various] shared resources.
- Jordan
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