Thank you ,Squyres , it is really useful !
ÔÚ 2010Äê7ÔÂ7ÈÕ ÏÂÎç7:22£¬Jeff Squyres <jsquyres_at_[hidden]>Ð´µÀ£º
> On Jul 6, 2010, at 10:48 PM, ÕÅ¾§ 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),
> > 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
> Jeff Squyres
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