Re: What kind of job is "openmosix friendly"?

Hi,

Processes become openMosix unfriendly when they are heavily IO bound.

ie.
If you have a process that is constantly reading and writing to the disk
drive, then that process has to return back to its originating node to do
its work...
The more heavily IO bound the processes are will mean the process will not
migrate at all.

A quick way to find out what processes are migratable, you can use:
ompsinfo

You can also patch oM with migshm to enable migration of shared memory also
but I have never had much luck with it.

As a general rule, I try to create processes that keep read/writes to a
minimum to allow better migration and use less network overheads.

I hope this helps.

Martin

On 28/07/06, James Wagner <[email protected]> wrote:
>
>  Something I found out recently (that is also in the FAQ) is that
> OpenMosix cannot distribute different threads to different machines.  A
> multi-process application can have each process sent to a different machine
> under certain conditions.  If you're using perl, grab Parallel::ForkManager
> off CPAN - it makes creating this type of program very easy.  (Local file IO
> and print statements kill the portability though.)
>
> Jim
>
> 张超 wrote:
>
> Hi, all:
>
>     I want to know what kind of job is "openmosix friendly"? I mean, How openmosix knows the job can be migrated? A multi-process or a multi-thread program?
>
>     I am trying openmosix now and I have lots of applications but, I don't know whether these applications can be used on openmosix. Thanks a lot.
>
> Eric
> 2006-07-27
>
>
>
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