From mboxrd@z Thu Jan  1 00:00:00 1970
Message-ID: <13426df10811111641j181e3358la1b28471273d8834@mail.gmail.com>
Date: Tue, 11 Nov 2008 16:41:08 -0800
From: "ron minnich" <rminnich@gmail.com>
To: "Fans of the OS Plan 9 from Bell Labs" <9fans@9fans.net>
In-Reply-To: <7e9abcc226acf9a6c04c415e1bca06bd@quanstro.net>
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References: <13426df10811111613u4ed6c6a4n8e0359905dfdbe94@mail.gmail.com>
	<7e9abcc226acf9a6c04c415e1bca06bd@quanstro.net>
Subject: Re: [9fans] 9grid
Topicbox-Message-UUID: 3c7c39d6-ead4-11e9-9d60-3106f5b1d025

On Tue, Nov 11, 2008 at 4:11 PM, erik quanstrom <quanstro@quanstro.net> wrote:
>> 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
>> }
>
> what's the .com for?
>

it's when I forgot to take part of the test :-)

>> Your /proc is now the unified /proc of all your nodes. (I used to do
>> this all the time with my plan 9 minicluster)
>
> does ps not mind if several processes have the same pid?
>

It never seemed to.

But of course if you have procs with same pid, the collisions are obvious.

So, do the easy thing:

for all nodes, mount them at
/proc/localhost
/proc/hostname/whatever

Then modify ps (takes about 5 minutes) so it iterates over /proc/*
where * is a set of host names.

now you can do fun stuff
slay node8/mpirun | rc
slay node*/mpirun | rc

There's a lot of good stuff in there if you want to use it ... I
actually implemented all this a few years back when Vic did hist first
xcpu code. It was really nice.

ron