access_NewSun_005 - ACCESS-NRI/accessdev-Trac-archive GitHub Wiki
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<h1 style="text-align: center; color: green"> CAWCR-BoM ACCESS NWP Ngamai Migration Working Group</h1>
Meeting 5: Wednesday 7th August 2013, 9E Meeting Room
Present: Michael Naughton, Chris Tingwell, Robin Bowen, Joan Fernon, Ilia Bermous, Wenming Lu, Zhihong Li, Yi Xiao, Robert Jukic, Joerg Henrichs
Apologies: Asri Sulaiman, Jim Fraser, Ivor Blockley
- Welcome Robert Jukic, Ngamai Porting Project Manager
- Timeline spreadsheet of major ACCESS-NWP suite porting steps Aug-Nov
- Main items in task list
- Other items from Task List
- Other business
- NMOC 31-Jul Tech Talk on Ngamai Porting
- Spreadsheet ppt file attached below.
- Single page identifying month-by-month major steps for CAWCR and NMOC.
- Timeline was discussed.
- Timings represent best estimate of when work will happen on these steps, realising that delays may occur if problems are encountered in these steps.
- More detail on these steps and resource reporting will be developed further.
- ACTION: Robin will draw up draft, discuss with individuals responsible for each of the work items.
Item 6: v11 software
- Robin reported info from Tim Pugh.
- No further steps done on this.
- Justin Freeman tasked to work on this, but he's currently on leave for 2 weeks.
- Importance of this as a fall-back if there are problems with v12 execs was again emphasised.
Item 26: APS1 NWP suites
- Xiao has created ngamai AG1 test NWP suite, based on NMOC operational AG1 suite components, using newly-created v12 executables.
- Suite has run successfully through 2 cycles, starting from 21-Jul.
- Joan is making some updates to directories, files, scripting of AG1 suite; Xiao will update to this version.
- Xiao is planning to start 1-month trial, using suitable recent period, e.g. start from 1-Jul; will check with Joan to get period with matching station-list files for this. Will start running in next couple of days.
- Cycle results so far have been examined
- OPS Stats are similar, but don't have good difference measure to quantify differences.
- VAR residuals after first VAR cycle are similar, but differences look a bit larger than expected.
- Need to look at developing ways to estimate OPS differences.
- ACTION: Chris, Xiao, Zhihong to look at OPS component assessment.
Item 17: Building executables
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Building executables is broken down into 3 steps (see details)
- source
- software stack
- documented build
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v11 sources for most of the required execs have been successfully re-created on solar, checked against existing execs.
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v12 execs for ngamai testing have been built for most of the required execs
-
Documented builds are being worked through:
- running completely from umui is difficult because the umui settings are hard-wired for particular v11 versions of compilers, mpi libraries, gcom libraries; need to identify best way to do the standard v12 builds.
- umui will also be needed on ngamai for ngamai building.
-
Ilia has reported variations of around 10% in run times with openmpi 1.6.5, up to 30% with 1.6.3.
- Joerg is not seeing variations of this magnitude in his machine acceptance test benchmark runs (N512 vn6.4), which have to be within 5%.
- ACTION: Joerg to look into variation in Ilia's job timings.
- Joerg is not seeing variations of this magnitude in his machine acceptance test benchmark runs (N512 vn6.4), which have to be within 5%.
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VAR/OPS use build scripts, building does not use varui, opsui; documented builds will be done in terms of these scripts. Same will be true of some of the other non-UM components.
-
VAR uses source from other svn libraries as well as VAR library; this is additional aspect to be managed in this case.
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AG1 UM executable
- Ngamai version including Zhian's physics mods has been built, using extracted source from Xiao, build step from Ilia.
- Item 3: Robin reported that /apps work has progressed further this week.
- NMOC 31-Jul Tech Talk on Ngamai Porting
- Robin sent email on Monday on this; link is NMOCTechTalks (internal Bureau only).
- For future talks, can NMOC please include ACCESS Ngamai Porting Working Group in the circulation list.
Ilia's email comments# Attachments