ignore checksum option and performance with (1,1) io layout

[junwang-noaa]

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Description

The PR includes code changes related to dycore NOAA-GFDL/GFDL_atmos_cubed_sphere#197. In PR#197, an option is added to allow one to override restart data integrity checks enforced for FMS-based io, also the PR has enhancements to improve new FMS-based io when using an io_layout of (1,1)

Issue(s) addressed

Link the issues to be closed with this PR, whether in this repository, or in another repository.
(Remember, issues must always be created before starting work on a PR branch!)

• fixes ignore checksum option and performance with (1,1) io layout NOAA-EMC/fv3atm#554

Testing

How were these changes tested? What compilers / HPCs was it tested with? Are the changes covered by regression tests? (If not, why? Do new tests need to be added?) Have regression tests and unit tests (utests) been run? On which platforms and with which compilers? (Note that unit tests can only be run on tier-1 platforms)

• hera.intel
• hera.gnu
• orion.intel
• cheyenne.intel
• cheyenne.gnu
• gaea.intel
• jet.intel
• wcoss2.intel
• wcoss_cray
• wcoss_dell_p3
• opnReqTest for newly added/changed feature
• CI

Dependencies

• waiting on Emc io fixes NOAA-GFDL/GFDL_atmos_cubed_sphere#197
• waiting on Ignore checksum option and performance with (1,1) io layout NOAA-EMC/fv3atm#556

[jkbk2004]

@junwang-noaa I think we can start working the PR?

[DeniseWorthen]

@junwang-noaa This got merged w/ Dusan's wcoss1 removal PR, right?

[jkbk2004]

@junwang-noaa This got merged w/ Dusan's wcoss1 removal PR, right?

Yes

[DeniseWorthen]

Code was committed with PR #1294