From mboxrd@z Thu Jan  1 00:00:00 1970
To: 9fans@9fans.net
Date: Wed, 12 Nov 2008 10:27:49 +0000
From: lupin636@gmail.com
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Subject: Re: [9fans] 9grid
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Thanks a lot Ron, it was clearly a really nice response.
You leave in no doubt about using between cpu and ssh.
I would like to try to do it now, but it semms to me that i have
authentication problems from terminal, because when i try to do cpu(1)
command from terminal (log in as Armando) i got nothing, i.e.
    term% cpu -h NODE -c date
    term%
otherwise by doing:
     term% cpu -h NODE
     term%
i got the same, and /mnt/term is empty, instead i think that cpu's
name space should be mounted on /mtn/term, isn't it?
Furthermore i also checked lib/ndb/auth on the file server, and  this
is what i have:
    hostid=bootes
            uid=!sys uid=!adm uid=*
I think that is correct, is it?
Thank you very much for your patience,

Armando.

> suppose you have a list of nodes
>
> cpu% NODES=(a b c d)
> cpu% echo $NODES
> a b c d
> cpu% for (i in $NODES) {
> � � � � cpu -h $i -c some-command&
> � � � � }
>
> Go ahead. Try it!
> �for (i in $NODES) {
> � � � � cpu -h $i -c date&
> � � � � }
>
> OK, now suppose you have what in the high end business is still called
> an 'input deck'. It's in a weird place. You get to it by saying
> some-command -i input-file
>
> for (i in $NODES) {
> � � � � cpu -h $i -c some-command -i your-file&
> � � � � }
>
> This will work whether there is a mount on those nodes for your home
> directory or not. Comes free with cpu.
>
> What if you for whatever reason want a ps to show all the proces on
> all the nodes you're running on.
>
> for (i in $NODES) {
> �import -a $i .com /proc /proc
>
> }
>
> Your /proc is now the unified /proc of all your nodes. (I used to do
> this all the time with my plan 9 minicluster)
>
> That way, if you want to kill all the some-commands running on ALL your nodes:
> slay some-command | rc
>
> The point being that you only need to run this command on the
> front-end, not on each node.
>
> You just can't even try to do this sort of thing with ssh.
>
> ron