Changes between Version 2 and Version 3 of ticket/0681

Timestamp:

2010-08-20T14:43:02+02:00 (14 years ago)

Author:

djlea

Comment:

--

ticket/0681

@@ -8 +8 @@
 '''ticket''' : #681
 
-'''Branches''' : [https://forge.ipsl.jussieu.fr/nemo/browser/branches/dev_1784_ASM      dev_1784_ASM ]
-               [https://forge.ipsl.jussieu.fr/nemo/browser/branches/dev_1784_OBS      dev_1784_OBS ] 
+'''Branches''' : Two branches [https://forge.ipsl.jussieu.fr/nemo/browser/branches/dev_1784_ASM      dev_1784_ASM ] and [https://forge.ipsl.jussieu.fr/nemo/browser/branches/dev_1784_OBS      dev_1784_OBS ] 
 ----
 
@@ -39 +38 @@
 Tests 1, 2, 3 and 4 all produce identical restart files at the end of the run. Test 5 produces a restart file which differs from the previous tests by approximately the same amount as the change specified in the increments file. This shows that the change has no impact on the rest of the model except if we decide we wish to apply increments to the model fields.
 
- * Processor configurations tested
- * etc----
-
 === Bit Comparability ===
 ||Does this change preserve answers in your tested standard configurations (to the last bit) ?|| YES ||
-||Does this change bit compare across various processor configurations. (1xM, Nx1 and MxN are recommended)||!'''YES/NO!'''||
+||Does this change bit compare across various processor configurations. (1xM, Nx1 and MxN are recommended)|| NO ||
 ||Is this change expected to preserve answers in all possible model configurations?|| YES ||
 ||Is this change expected to preserve all diagnostics? [[BR]]!,,!''Preserving answers in model runs does not necessarily imply preserved diagnostics. !''|| YES ||
 
 If you answered !'''NO!''' to any of the above, please provide further details:
+
+Cannot test bit comparison because the NEMO base code does not bit compare on our systems. However, the observation operator will have no effect on the model bit comparison (since this does not feedback into the model fields). Applying increments may not bit compare. 
 
  * Which routine(s) are causing the difference?
@@ -179 +177 @@
 
 !''Please !''summarize!'' any changes in runtime or memory use caused by this change......!''
+No change if turned off. If active the runtime change depends on the number observations for the observation operator. The runtime change is neglible for the assimilation increments code.
 
 ----
@@ -184 +183 @@
 ||Has the code been wholly (100%) produced by NEMO developers staff working exclusively on NEMO?|| YES? ||
 
+The code has been produced by the NEMOVAR consortium which includes ECMWF, CERFACS, INRIA and the Met Office
+
 If No: