[FLASH-USERS] disable check pointing

[Mike Zingale]

you can use the io/null module to completely disable I/O (or atleast, you 
used to be able to).  Specify this in your Modules file.


On Fri, 18 Jan 
2008, Brock Palen wrote:

> Ok I will try setting them all to -1,
>
> The run just crashed trying to write checkpoint_002
> It segfault'ed when the file size was 2.2 GB.  We were using HDF5 serial, on 
> luster.
>
> Thanks,
>
> Brock Palen
> Center for Advanced Computing
> brockp at umich.edu
> (734)936-1985
>
>
> On Jan 18, 2008, at 1:17 PM, John ZuHone wrote:
>
>> Brock,
>>
>> 	I think that if you want no checkpoints at all you should set trstrt 
>> < 0, and make sure that nrstrt < 0 (integer) and zrstrt < 0 as well.
>> 
>> Best,
>> 
>> John ZuHone
>> 
>> On Jan 18, 2008, at 8:56 AM, Brock Palen wrote:
>> 
>>> For parallel runs even if I set
>>> 
>>> trstrt=0
>>> 
>>> two checkpoint files were written.
>>> [ 01-17-2008  23:51.27 ] message: [CHECKPOINT_WR] NOTE: will send 
>>> 10     blocks per message.
>>> [ 01-17-2008  23:51.29 ] file_wr_open: type=checkpoint 
>>> name=Ni_Tem_hdf5_chk_0000
>>> [ 01-17-2008  23:52.30 ] file_wr_close: type=checkpoint 
>>> name=Ni_Tem_hdf5_chk_0000 blocks=5449
>>> [ 01-17-2008  23:52.32 ] file_wr_open: type=plotfile 
>>> name=Ni_Tem_hdf5_plt_cnt_0000
>>> [ 01-17-2008  23:52.36 ] file_wr_close: type=plotfile 
>>> name=Ni_Tem_hdf5_plt_cnt_0000
>>> [ 01-17-2008  23:52.36 ] [FLASH]: Enter evolution loop...
>>> [ 01-17-2008  23:52.36 ] step: n=1 t=0.000000E+00 dt=1.000000E-16
>>> [ 01-17-2008  23:59.26 ] file_wr_open: type=checkpoint 
>>> name=Ni_Tem_hdf5_chk_0001
>>> [ 01-18-2008  00:00.13 ] file_wr_close: type=checkpoint 
>>> name=Ni_Tem_hdf5_chk_0001 blocks=5449
>>> 
>>> No other checkpoint files have been written so far,  though several plot 
>>> files have been written.  Is this expected behavior?
>>> 
>>> Flash2.5 + pgi +openmpi-1.2.3
>>> hdf5/serial
>>> 
>>> 
>>> Brock Palen
>>> Center for Advanced Computing
>>> brockp at umich.edu
>>> (734)936-1985
>>> 
>> 
>> 
>


-----------------------------------------------------------------------------
Michael Zingale (mzingale at mail.astro.sunysb.edu)
Assistant Professor

Dept. of Physics and Astronomy     office: ESS 440
SUNY Stony Brook                   phone:  631-632-8225
Stony Brook, NY 11794-3800         web: http://www.astro.sunysb.edu/mzingale
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