/[MITgcm]/MITgcm_contrib/llc_hires/llc_90/code-async/readme.txt
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revision 1.4 by dimitri, Sun Mar 3 13:59:35 2019 UTC revision 1.5 by dimitri, Wed Mar 6 16:54:57 2019 UTC
# Line 1  Line 1 
1  From Bron, February 28, 2019  From Bron Nelson, February 28, 2019
2    
3  In the newest version, it is no longer necessary to hand-edit the  In the newest version, it is no longer necessary to hand-edit the
4  constants in "recvTask.c" and "readtile_mpiio.c".  Instead, the file  constants in "recvTask.c" and "readtile_mpiio.c".  Instead, the file
# Line 22  are dumping 20 different fields, there m Line 22  are dumping 20 different fields, there m
22  allocated to the I/O.  Note that the 20 (or whatever) number is  allocated to the I/O.  Note that the 20 (or whatever) number is
23  *aggregate* across all the I/O nodes, NOT a "per node" number.  *aggregate* across all the I/O nodes, NOT a "per node" number.
24    
25    Another important constraint is that the total memory on all the I/O
26    nodes *collectively* needs to be twice as big as the largest epoch you
27    write.  So, if you are writing a 1.5 TB pickup dump, then you should
28    have a sum total of 3TB of memory (or more) on the set of I/O nodes.
29    
30  Choose dumpFreq and pChkptFreq as usual. We're not set up  Choose dumpFreq and pChkptFreq as usual. We're not set up
31  to do the rolling checkpoints yet. It'll dump u,v,t, and etan now -  to do the rolling checkpoints yet. It'll dump u,v,t, and etan now -
32  send me a list of other fields you want, as it is rather involved  send me a list of other fields you want, as it is rather involved
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