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Subject: Re: [OMPI devel] How to disable paffinity
From: Õž§ (iam.chilli_at_[hidden])
Date: 2010-07-07 21:54:31


Thank you ,Squyres , it is really useful !

ÔÚ 2010Äê7ÔÂ7ÈÕ ÏÂÎç7:22£¬Jeff Squyres <jsquyres_at_[hidden]>дµÀ£º

> On Jul 6, 2010, at 10:48 PM, Õž§ wrote:
>
> > 1.If I write a rlogin component ,
>
> Is the command line of rlogin that much different than that of rsh/ssh?
> For example, can you just s/rsh/rlogin/ on the overall command line and
> have it just work?
>
> If so, I suspect that tweaking the rsh plm might be far simpler than having
> your own component.
>
> > can I just login in the node in the cluster and launch the process . If
> it is ,what the role the odls plays ??
>
> ODLS = ORTE Daemon Local launch Subsystem.
>
> PLM = Process Lifecycle Management.
>
> Meaning: the PLM is used to launch orteds (more on this below) across
> multiple nodes. The ODLS is used to launch processes locally from the orted
> (e.g., via POSIX fork/exec).
>
> > 2.what is orted? Should the orted exists in every node and functions as a
> node process launch proxy ?
>
> Yes. The orted = ORTE daemon. It is almost always the first thing
> launched on each node and acts as a proxy for launching, killing, and
> monitoring the user's applications on each node. It also does other control
> kinds of things, like relay stdout/stderr back up to the HNP (more below),
> etc.
>
> > 3,what is hnp ? Is every job has only one hnp ,and when I use mpirun ,
> the mpirun process is hnp ??
>
> HNP = head node process, meaning mpirun (or actually, orterun -- mpirun is
> a symlink to orterun). The HNP functions as an orted as well, so it can use
> the ODLS to launch processes locally, etc.
>
> Ralph can provide more detail on all of the above, but these are the
> basics.
>
> --
> Jeff Squyres
> jsquyres_at_[hidden]
> For corporate legal information go to:
> http://www.cisco.com/web/about/doing_business/legal/cri/
>
>
>
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-- 
Õž§