Changes between Version 7 and Version 8 of 2009WP/2009Stream1

Timestamp:

2009-10-29T11:47:53+01:00 (14 years ago)

Author:

acc

Comment:

--

2009WP/2009Stream1

@@ -61 +61 @@
 tests with a 16x16 ORCA025 composition on 221 processors (thereby discarding 35 land-only regions) have been
 completed but the resulting IO server domains are irregularly sized and significantly overlap leading to
-difficulties in collating global fields from the resultant files. This suggests improvements are required to the 
-algorithms to properly support this facility.
+difficulties in collating global fields from the resultant files. A solution has been tested which assigns
+ocean regions to IO servers using their equivalent rank in a decomposition which retains land-only
+regions rather than their actual rank in the ocean communicator. Early indications suggest this approach works 
+and an early adoption of the replacement algorithm is hoped for.
 {{{
 
@@ -68 +70 @@
 jpnij /= jpni*jpnj
 ------------------
-# io servers  | # ocean procs | buffersize | success? | runtime (s) |
+# io servers  | # ocean procs | buffersize | success? | time (s)|   comments
 -----------------------------------------------------------------------------------------------------
-     32       |      221      |    256     |     no   |      -      | " Plus de requete disponible !!!!"
-     32       |      221      |    384     |    yes   |     2781    |  
+     32       |      221      |    256     |     no   |   -     | " Plus de requete disponible !!!!"
+     32       |      221      |    384     |     yes  |  2781   |   Completed but output domains irregularly sized and overlap
+     32       |      221      |    1024    |     no   |   -     |   Out Of Memory error ("OOM killer terminated this process")
+     32       |      221      |    512     |     yes  |  2873   |   Also increased MPICH_UNEX_BUFFER_SIZE from 60MB to 128MB
+     32       |      221      |    512     |     yes  |  2472   |   First run with corrected colour assignment
+     32       |      221      |    512     |     yes  |  2407   |   run with final version of the corrected colour assignment
+     16       |      221      |    512     |     yes  |  3593   |   run with final version of the corrected colour assignment 
 }}}
      '''Status:''' Onging (NOCS-Southanpton)