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Full Discussion: Newbie question
Top Forums Programming Newbie question Post 302203551 by spirtle on Monday 9th of June 2008 06:21:46 AM
Old 06-09-2008
Disclaimer: It's been a while since I have used parallel machines so I cannot remember details, but since nobody else has answered yet I'll have a go.

Now, your supercomputer might be set up differently, but every one I have ever used
uses a job submission system like PBS or NQS. You write a script with commands for the particular job submission system you are using (N.B. MPI is the parallel communications library, not a scripting language). You need to check whether this system allows you to subdivide a 32-node partition and run on each subdvision.

If this is impossible, and you cannot convince the admin to allow 16-node partitions, then you probably will have to change your program logic to run on 32-nodes, which means learning a little bit about parallel programming. Start by finding out where the magic number 16 comes from in your program, how the data is decomposed over the nodes, and then try to figure out how to generalise this for 32 (or any number) nodes.
 

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DEBCONF-SET-SELECTIONS(1)					      Debconf						 DEBCONF-SET-SELECTIONS(1)

NAME
debconf-set-selections - insert new default values into the debconf database SYNOPSIS
debconf-set-selections file debconf-get-selections | ssh newhost debconf-set-selections DESCRIPTION
debconf-set-selections can be used to pre-seed the debconf database with answers, or to change answers in the database. Each question will be marked as seen to prevent debconf from asking the question interactively. Reads from a file if a filename is given, otherwise from stdin. WARNING
Only use this command to seed debconf values for packages that will be or are installed. Otherwise you can end up with values in the database for uninstalled packages that will not go away, or with worse problems involving shared values. It is recommended that this only be used to seed the database if the originating machine has an identical install. DATA FORMAT
The data is a series of lines. Lines beginning with a # character are comments. Blank lines are ignored. All other lines set the value of one question, and should contain four values, each separated by one character of whitespace. The first value is the name of the package that owns the question. The second is the name of the question, the third value is the type of this question, and the fourth value (through the end of the line) is the value to use for the answer of the question. Alternatively, the third value can be "seen"; then the preseed line only controls whether the question is marked as seen in debconf's database. Note that preseeding a question's value defaults to marking that question as seen, so to override the default value without marking a question seen, you need two lines. Lines can be continued to the next line by ending them with a "" character. EXAMPLES
# Force debconf priority to critical. debconf debconf/priority select critical # Override default frontend to readline, but allow user to select. debconf debconf/frontend select readline debconf debconf/frontend seen false OPTIONS
--verbose, -v verbose output --checkonly, -c only check the input file format, do not save changes to database SEE ALSO
debconf-get-selections(1) (available in the debconf-utils package) AUTHOR
Petter Reinholdtsen <pere@hungry.com> 2012-09-10 DEBCONF-SET-SELECTIONS(1)
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