[FLASH-USERS] Restart

[Mousumi Das]

Hi All,

   I am using FLASH2.5. My programme stops while writing a checkpint file 
after outputing several plot files, but it has not completed the run till 
tstop value.

  [ 12-14-2007  21:45.22 ] step: n=364 t=5.630710E-09 dt=1.014811E-11
  [ 12-14-2007  21:48.17 ] [AMR_REFINE_DEREFINE]: refinement initiated at 
21:48.1 7
  [ 12-14-2007  21:49.17 ] [AMR_REFINE_DEREFINE] blocks   all:  min=1326 
max=1336  tot=13321
  [ 12-14-2007  21:49.17 ] [AMR_REFINE_DEREFINE] blocks valid:  min=1163 
max=1167  tot=11656
  [ 12-14-2007  21:49.17 ] [AMR_REFINE_DEREFINE]: refinement complete
  [ 12-14-2007  21:49.32 ] file_wr_open: type=checkpoint 
name=Ni_Tem_hdf5_chk_000 2


I want to restart the simulation with previous checkpointpoint file
Ni_Tem_hdf5_chk_0001. According to FLASH manual I change the restart 
logical variable to .true.
cpunumber I specfied 0001 ( last written checkpointfile)
pltnumber 0001 ( last written plotfile number after 0001 check point)

Although the last written pltnumber is 0056. But there is gap between
checkpoint file chk_0001 and chk_0002.

But with this I am not able to restart the simulation. How do I restart 
the simulation run if I want to get the plotfile (0057) after the last 
plotfile generated (0056).
thanks,
Mousumi

On Mon, 17 Dec 2007, Anshu Dubey wrote:

> People have used the parallel hdf5 module in Flash2.5 at the center
> and still do, but on many platforms the restart is extremely slow.
> We haven't been able to determine the cause. However, fortunately,
> the problem didn't get carried over to Flash3, so we strongly
> recommend switching over to Flash3 if it is possible for you.
>
> Anshu
>
>> Hi all,
>>
>>   I have a serious problem when using the parallel hdf5 module to
>> restart from a checkpoint file. It takes about half an hour to read a
>> single variable to each node for a 1GB file. The same problem was
>> reported two year ago
>> (http://flash.uchicago.edu/pipermail/flash-users/2005-April/001938.html)
>> but I cannot find the follow-ups. Did anyone succeed in using the
>> parallel hdf5 module so far? Will the Flash center continue support such
>> issue on Flash2.5? Thanks!
>>
>> Bests,
>> Shikui
>>
>
>
>
>