[MITgcm-support] clever pickup too clever for me

[Jean-Michel Campin]

Hi Matt,

Please have a look at :
http://forge.csail.mit.edu/pipermail/mitgcm-support/2007-October/005080.html
Also, if you did not keep the meta files, 
there are few verification experiment with "minimal" pickup*.meta
file that allow to restart from an old pickup.
(and this is also explained in the email mentionned above).

Jean-Michel

On Wed, Sep 03, 2008 at 10:35:10PM -0700, Matthew Mazloff wrote:
> Hi Patrick,
>
> Actually it seems that if you provide no meta file at all, which is what 
> I did, the model will try to read the pickup in a "new" way and crash.  I 
> think you need the old meta file and also need
> pickupStrictlyMatch=.FALSE.,
>
> I think that with an an old meta file nbFields = 0 and is read in as how 
> use to be:
>
>           CALL READ_REC_3D_RL( fn, fp, Nr, uVel,  1, myIter,myThid )
>           CALL READ_REC_3D_RL( fn, fp, Nr, guNm1, 2, myIter,myThid )
>           CALL READ_REC_3D_RL( fn, fp, Nr, vVel,  3, myIter,myThid )
>           CALL READ_REC_3D_RL( fn, fp, Nr, gvNm1, 4, myIter,myThid )
>           CALL READ_REC_3D_RL( fn, fp, Nr, theta, 5, myIter,myThid )
>           CALL READ_REC_3D_RL( fn, fp, Nr, gtNm1, 6, myIter,myThid )
>           CALL READ_REC_3D_RL( fn, fp, Nr, salt,  7, myIter,myThid )
>           CALL READ_REC_3D_RL( fn, fp, Nr, gsNm1, 8, myIter,myThid )
>           CALL READ_REC_3D_RL( fn,fp,1, etaN, nj*Nr+1, myIter,myThid )
>
> if no meta file is presented, as I did, nbfields = -1, and reads in  
> pickup file in the new way (which goes uVel, vVel, theta, salt, guNm1, 
> gvNm1, gtNm1, gsNm1, etaN), which isn't consistent, and this causes the 
> model to crash.
>
> So I'll make up some meta files and throw them in there...(or I could  
> hardcode nbFields to 0)....and let you know if it works
>
> -Matt
>
> ps> of course, i don't know what's gonna happen with seaice, should be 
> fun :)
>
>
>
>
>
>
>
>
> On Sep 3, 2008, at 9:56 PM, Patrick Heimbach wrote:
>
>> Hi Matt,
>>
>> what has changed is that you now
>> also provide the .meta file, and its content is checked for  
>> consistency
>> (might be important for seaice where it's not clear which options/ 
>> grids etc you're using).
>> Previously, the .meta files weren't evaluated.
>> If you have an old pickup and didn't keep the .meta file,
>> then just add in file data under PARM03 following option (as you did)
>>   pickupStrictlyMatch=.FALSE.,
>> In that case the model warns you that the pickup might not be  
>> consistent,
>> but continues running (assuming you know what you're doing).
>> So ideally, keep the .meta files for your new runs and provide them
>> when re-starting from pickup.
>>
>> -p.
>>
>>
>>
>> On Sep 3, 2008, at 11:47 PM, Matthew Mazloff wrote:
>>
>>> Hello JMC,
>>>
>>> I recently updated. It has been quite awhile since last update.     
>>> When trying to run the model it immediately blew up.  I strongly  
>>> suspect that it is the  "clever pickup" as the model blows up in 2  
>>> time steps.  I think fields are being improperly initialized.
>>>
>>> I don't have the pickup meta files so I use
>>>  pickupStrictlyMatch=.FALSE.,
>>> and I get the following warnings
>>> (PID.TID 0001.0001) WARNING >> MDS_READ_META: file: pickup. 
>>> 0000000001.meta , pickup.0000000001.001.001.meta
>>> (PID.TID 0001.0001) WARNING >> MDS_READ_META: Files DO not exist
>>> (PID.TID 0001.0001) WARNING >> READ_PICKUP:  no field-list found
>>> (PID.TID 0001.0001) WARNING >>  try to read pickup as currently  
>>> written
>>> (PID.TID 0001.0001) WARNING >> MDS_READ_META: file: pickup_seaice. 
>>> 0000000001.meta , pickup_seaice.0000000001.001.001.meta
>>> (PID.TID 0001.0001) WARNING >> MDS_READ_META: Files DO not exist
>>> (PID.TID 0001.0001) WARNING >> SEAICE_READ_PICKUP:  no field-list  
>>> found
>>> (PID.TID 0001.0001) WARNING >>  try to read pickup as currently  
>>> written
>>>
>>> So what has changed...I don't mind restructuring pickup.data or  
>>> making a meta file...but can you please let me know the best way to 
>>> do this.
>>>
>>> Or is it possibly not the clever pickup?
>>>
>>> -Thanks
>>> Matt
>>>
>>>
>>>
>>> _______________________________________________
>>> MITgcm-support mailing list
>>> MITgcm-support at mitgcm.org
>>> http://mitgcm.org/mailman/listinfo/mitgcm-support
>>
>> ---
>> Patrick Heimbach | heimbach at mit.edu | http://www.mit.edu/~heimbach
>> MIT | EAPS 54-1518 | 77 Massachusetts Ave | Cambridge MA 02139 USA
>> FON +1-617-253-5259 | FAX +1-617-253-4464 | SKYPE patrick.heimbach
>>
>>
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