NCO High Performance Computing (HPC) Implementation Standards
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> Implementation Standards
NCO High Performance Computing (HPC) Implementation Standards
The HPC Implementation Standards outline policies and technical standards that must be met in order to implement operational code or numerical models in the production suite running on the Weather & Climate Operational Supercomputing System (WCOSS) and maintained by NCEP Central Operations (NCO). The coding standards, examples of operational-quality scripts and code, and best practices presented have been established to enable operational stability, efficient troubleshooting and improved environmental equivalence.
Implementation Standards version 11.0.0
Release Date:
January 19, 2022
Updates for WCOSS2
ImplementationStandards.v11.0.0.pdf
Implementation Standards version 10.2
Release Date:
April 17, 2019
Clarify
job
jobid
and
DCOM
definitions in Table 1
Addition of
subcyc
variable in Table 1
Updated all references to jlogfile. The centralized jlogfile no longer exists
Clarify usage of
cpfs
utility
Updated
setpdy.sh
description to reflect latest directory structure
Clarified requirement for restart capability
Added requirement to run MPMD child processes in separate sub-directories from the main working directory
Updated language for use of data of opportunity
Removed references to
check_libs.sh
and
check_incs.sh
as these scripts are no longer maintained
Rewrite of FORTRAN Logical Unit Number standard to be more flexible but the goal of the standard, which is to avoid hard-coded directory paths and filnames in source code, remains unchanged
Added a standard for code readability
Modified definition of PS4 to improve readability of standard out
Various modifications to come in line with Environment Equivalence (EE2) standards, including:
Output must be written only to packages
com
nwges
or
DATA
structures
Remove all references to pcom - replaced by wmo sub-directory under
com
Remove com-nawips directory - replaced by
gempak
sub-directory under
com
Makefile targets must include all of the following: all, debug, install and clean
Shared packages must be backward compatible
Added standard for restricted data permissions
Added standard to eliminate false errors in the output, including syntax errors and other common errors like
No such file or directory
Added section about resolving bugzilla reports before code delivery
Added standard to have primary and backup support contact for every application
Updated all examples and tables to reflect new standards
Implementation Standards v10.2.pdf
Implementation Standards version 10.1
Release Date:
March 17, 2016
Added
module
_ver variable to the Standard Environment Variables table.
On the Cray XC40 systems, the prod_envir module is used to set production path variables. On Phase 1 & 2, symbolic links at the root level are available to production path directories.
setpdy.sh
description updated to include ability to specify the number of dates desired.
Introduced new
compath.py
mail.py
, and
getsystem.pl
utilities.
Updated the job card,
-job,
ex
-script, build script, modulefile, and makefile examples to use the
compath.py
and
mail.py
utilities and to reflect changes for the Cray XC40 systems.
The default versions (and higher) of the Intel and Cray compilers installed on the Cray XC40 systems are allowed in production on the new systems.
Production-approved libraries on the Cray XC40 systems are in /usrx/local/prod/ and /gpfs/hps/nco/ops/nwprod/lib/.
Removed the envir.h example and moved the variable definitions it contained into the job card example.
Added an example version file (Example 5), an example run of the "module display prod_envir" command (Example 7), and an example build readme file (Example 10).
Removed requirement to wrap all copies to com, nwges, and pcom in a check for
$SENDCOM
. It is now optional.
Implementation Standards v10.1.pdf
Implementation Standards version 10.0
Release Date:
May 13, 2015
Updated for the WCOSS Phase 2 system.
Introduced a table of Standard Environment Variables and where they should be set in the production workflow.
Production utilities are accessed via the prod_util module instead of the
setup.sh
script. This module adds the utilities to the user's
$PATH
Introduced the requirement to use modules to access GRIB utilities and NCEP production libraries.
Added a section on File Name Conventions for files sent to com and pcom.
Implementation Standards v10.0.pdf
Implementation Standards version 9.2
Release Date:
March 6, 2013
Implementation Standards v9.2.pdf
Implementation Standards version 9.1
Release Date:
November 19, 2012
Updated for the WCOSS Phase 1 system.
Implementation Standards v9.1.pdf
Implementation Standards version 8.0
Release Date:
March 28, 2012
Implementation Standards v8.0.pdf
Implementation Standards version 6.0
Release Date:
June 26, 2009
Implementation Standards v6.0.pdf
Page last modified: 30 January 2025.
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