Changes between Version 2 and Version 3 of Xgrid


Ignore:
Timestamp:
12/20/07 12:44:39 (19 years ago)
Author:
kristen@…
Comment:

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  • Xgrid

    v2 v3  
    1111Only people with Macs can send executables directly to the grid, otherwise you must get an account on callattice.astro.columbia.edu in order to compile and submit your code to the grid (talk to Kristen). This is not a replacement for parallel calculations on beehive, in that there is no MPI support. It is useful mostly if you have several serial (as opposed to parallel) jobs to run on separate processors, i.e. "brute force" parallelization. Because the grid nodes are Intel Macs, currently only executables produced on Intel Macs can be run (but see below).
    1212
    13 The grid nodes are 8 Imacs with 2x2GHz processors and 2GB of memory, currently sitting in the 14th floor library. They accept jobs at any time at the moment but keep in mind that they are also used during the day and during lab classes in the evening. If we find that the Xgrid load on them is too much, the grid setup will be adjusted so that the nodes only accept jobs when they are idle (i.e. at night mostly).
    14 
    15 === Power PC Expansion: ===
    16 
    17 If there is enough interest, a second grid for Power PC Macs could easily be set up. If you are willing to contribute your Power PC Mac idle CPU time, let us know. If we have even a few machines, a separate grid will be setup. If you want to contribute your Intel Mac idle CPU time, you are also welcome to do so.
     13The grid nodes are 8 Imacs with 2x2GHz processors and 2GB of memory, currently sitting in the 14th floor library. In addition, Peter Trip from the Psychology department has made available to us 20 Imacs with 2x2.2Ghz processors. The agents accept jobs when they are idle.
    1814
    1915=== Use: ===
    … …  
    3531The last two arguments tell Xgrid to return job files in the current directory (./)
    3632
     33The more efficient and reliable way to submit jobs to the Xgrid, however, is to use GridStuffer. You can find information here:
     34http://cmgm.stanford.edu/~cparnot/xgrid-stanford/html/goodies/GridStuffer-info.html
     35
     36
    3737=== Further Information: ===
    38  * Compilers: g77 and gfortran (from hpc.sourceforge.net, Oct 06 and May 07 versions respectively) have been installed on the nodes and tested with Xgrid. g95 may also work. Xcode Tools has been installed as well, so all the c compilers should be loaded properly.  If there is a library or compiler you want on the grid, please request it from Kristen or Cameron.
     38 * Compilers: g77 (from hpc.sourceforge.net, Oct 06 version) has been installed on the nodes and tested with Xgrid. (g95 and gfortran will also be setup at some point in the future). Xcode Tools has been installed as well, so all the c compilers should be loaded properly.  If there is a library or compiler you want on the grid, please request it from Kristen or Cameron.
    3939
    4040 * For more info on various Xgrid user options: "man xgrid"