08-27-2012
If you have results, in some static form, you can dynamically mount NFS connections as needed to acces those directories.
Is your "backbone" 1GB or 10GB? If you can create a subnet for the fast NICs and each UNIX box has a 10GB NIC, this is very acceptable - what we do now. We create a job's data, notify the other box, it NFS mounts the dataset readonly, and away we go.
There is another issue to consider. Even though you may get great throughput, some boxes have issues. Solaris with older Qlogix cards takes a hit on interrupts. Because the cpu does a lot of work for the NIC.
All of this is a case of limiting factors, something you see in Science a lot. When you raise the bar on one limit (cpu) then some other resource becomes limiting (I/O in this case or interrupt stack). Since it is not economically feasible to build highways to completely handle rush hour traffic, so it is with computers. As long as it does not hurt production, and you get more processing power, you are okay. You did pay for the hadware, so use it.
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LEARN ABOUT DEBIAN
grid-mapfile-check-consistency
GRID-MAPFILE-CHECK(8) Globus Commands GRID-MAPFILE-CHECK(8)
NAME
grid-mapfile-check-consistency - Add an entry to a grid map file
SYNOPSIS
grid-mapfile-check-consistency [-h] [-help] [-usage] [-version]
grid-mapfile-check-consistency [-mapfile MAPFILE] | [-f MAPFILE]
DESCRIPTION
The grid-mapfile-check-consistency program performs basic checks for validity of a gridmap file. These checks include checks for existence,
duplication of entries, and valid local user names. If the gridmap file is valid, grid-mapfile-check-consistency exits with a zero exit
code, otherwise it exits with a non-zero exit code. In either case, it displays information about its progress as it parses and validates
the gridmap file.
By default, grid-mapfile-check-consistency will check the gridmap file named by the GRIDMAP environment variable if present. If that
variable is not set, it will check the file $HOME/.gridmap for non-root users if present. If that doesn't exist or
grid-mapfile-check-consistency is run as root, it will then check /etc/grid-security/grid-mapfile. This can be changed by the use of the
-mapfile or -f command-line options.
The full set of command-line options to grid-mapfile-check-consistency are:
-help, -h, -usage
Display the command-line options to grid-mapfile-check-consistency.
-version
Display the version number of the grid-mapfile-check-consistency command.
-mapfile MAPFILE, -f MAPFILE
Check the gridmap file named by MAPFILE instead of the default.
EXAMPLES
Check that the gridmap file in /etc/grid-security is valid:
% grid-mapfile-check-consistency -f /etc/grid-security/grid-mapfile
Checking /etc/grid-security/grid-mapfile
Verifying grid mapfile existence...OK
Checking for duplicate entries...OK
Checking for valid user names...OK
Check a gridmap file that has an invalid local user name:
% grid-mapfile-check-consistency -f /etc/grid-security/grid-mapfile
Checking /etc/grid-security/grid-mapfile
Verifying grid mapfile existence...OK
Checking for duplicate entries...OK
ERROR: baduser is not a valid local username
ERROR: Found 1 invalid username(s)
ENVIRONMENT VARIABLES
The following environment variables affect the execution of grid-mapfile-check-consistency:
GRIDMAP
Path to the default gridmap to check.
FILES
The following files affect the execution of grid-mapfile-check-consistency:
$HOME/.gridmap
Path to the default gridmap to check if the GRIDMAP environment variable is not set for non-root users.
/etc/grid-security/grid-mapfile
Path to the default gridmap to check if GRIDMAP environment variable is not set and the above file does not exist.
SEE ALSO
grid-mapfile-add-entry(8), grid-mapfile-delete-entry(8)
AUTHOR
University of Chicago
Globus Toolkit 5.0.1 03/19/2010 GRID-MAPFILE-CHECK(8)