MOSAIK

Timestamp:

Apr 1, 2020 9:21:48 AM (4 years ago)

Author:

suehring

Comment:

--

project/results

@@ -64 +64 @@
 || Nested simulation || 12/03/2020 || Simulation was started again. || After several optimizations where made in the synthetic turbulence generator and some minor bugs were fixed, the simulation was started again. Berlin complex is under maintenance now. ||
 || Nested simulation || 25/03/2020 || Simulation was running until exactly 05:00UTC. Crashed by floating overflow in the child domain. || Last restart time was at 04:55 UTC, flow fields, surface data look reasonable. Restarting from last restart step using traceback option and print statements revealed an floating overflow in output of averaged 3D variable 'theta' at grid point (k,j,i) = (97,117,968), which is far away from any building. Think this is also related to a restart problem where faulty data is read for pt_av. Proceeding without averaged data output worked. ||
-|| Nested simulation || 30/03/2020 || Simulation has reached 06:05 UTC.   || At the moment we are out of computing time. Also, the unstructured output of the virtual measurements consumes far too much CPU time at the moment. With smaller number of processes this was not obvious, however, with large number of processes the probability that processes interfere becomes higher so that the slowdown of IO becomes more pronounced. First we need to accelerate the output before we can proceed. ||
+|| Nested simulation || 01/04/2020 || Simulation has reached 06:05 UTC. || At the moment we are out of computing time. Also, the unstructured output of the virtual measurements consumes far too much CPU time at the moment. With smaller number of processes this was not obvious, however, with large number of processes the probability that processes interfere becomes higher so that the slowdown of IO becomes more pronounced. First we need to accelerate the output before we can proceed. Moreover, with further debugging the reason of restart failures could be most probably narrowed down to file-system issues rather than palm-internal problems (sending trouble ticket to the computing center).||
 
 ----