/[MITgcm]/MITgcm/model/src/write_state.F
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revision 1.4 by heimbach, Mon Nov 13 16:32:58 2000 UTC revision 1.5 by adcroft, Thu Nov 30 20:02:41 2000 UTC
# Line 2  C $Header$ Line 2  C $Header$
2  #include "CPP_OPTIONS.h"  #include "CPP_OPTIONS.h"
3    
4  C--  File read_write.F: Routines to handle mid-level I/O interface.  C--  File read_write.F: Routines to handle mid-level I/O interface.
 C--   Contents  
5  C--   o WRITE_STATE - Write out model state.  C--   o WRITE_STATE - Write out model state.
6    
7    C The following CPP flag (MULTIPLE_RECORD_STATE_FILES) is
8    C #define/#undefed here since it is specific to this routine and
9    C very user-preference specific.
10    C
11    C If #undefed (default) the state files are written as in all versions
12    C prior to checkpoint32, where a file is created per variable, per time
13    C and per tile. This *has* to be the default because most users use this
14    C mode and all utilities and scripts (diagnostic) assume this form.
15    C It is also robust, as explained below.
16    C
17    C If #defined, subsequent snap-shots are written as records in the
18    C same file (no iteration number in filenames).
19    C Advantages: - fewer files
20    C             - for small problems, is easy to copy the output around
21    C Disadvantages:
22    C             - breaks a lot of diagnostic scripts
23    C             - for large or long problems this creates huge files
24    C             - is an unexpected, unsolicited change in behaviour which came
25    C               as a surprise (in c32) and inconvenience to several users
26    C             - can not accomodate changing the frequency of output
27    C               after a pickup (this is trivial in previous method
28    C               but needs new code and parameters in this new method)
29    C Known Bugs:
30    C             - if the length of integration is not exactly an integer
31    C               times the output frequency then the last record written
32    C               (at end of integration) overwrites a previously written
33    C               record corresponding to an earier time. *BE WARNED*
34    
35    #undef  MULTIPLE_RECORD_STATE_FILES
36      
37    
38    
39  CStartofinterface  CStartofinterface
40        SUBROUTINE WRITE_STATE ( forceOutput, myCurrentTime,        SUBROUTINE WRITE_STATE ( forceOutput, myCurrentTime,
41       &    myIter, myThid )       &    myIter, myThid )
# Line 44  C     myCurrentTime - Current time of si Line 75  C     myCurrentTime - Current time of si
75  CEndofinterface  CEndofinterface
76    
77  C     == Local variables ==  C     == Local variables ==
78          CHARACTER*(MAX_LEN_MBUF) suff
79        INTEGER iRec        INTEGER iRec
80    
81        IF (        IF (
# Line 58  C--   Going to really do some IO. Make e Line 90  C--   Going to really do some IO. Make e
90           _BEGIN_MASTER( myThid )           _BEGIN_MASTER( myThid )
91    
92  C--     Write model fields  C--     Write model fields
93    #ifdef MULTIPLE_RECORD_STATE_FILES
94    C       Write each snap-shot as a new record in one file per variable
95    C       - creates relatively few files but these files can become huge
96          CALL WRITE_REC_XYZ_RL( 'U',  uVel,iRec,myIter,myThid)          CALL WRITE_REC_XYZ_RL( 'U',  uVel,iRec,myIter,myThid)
97          CALL WRITE_REC_XYZ_RL( 'V',  vVel,iRec,myIter,myThid)          CALL WRITE_REC_XYZ_RL( 'V',  vVel,iRec,myIter,myThid)
98          CALL WRITE_REC_XYZ_RL( 'T', theta,iRec,myIter,myThid)          CALL WRITE_REC_XYZ_RL( 'T', theta,iRec,myIter,myThid)
99          CALL WRITE_REC_XYZ_RL( 'S',  salt,iRec,myIter,myThid)          CALL WRITE_REC_XYZ_RL( 'S',  salt,iRec,myIter,myThid)
100          CALL WRITE_REC_XY_RL ('PS',cg2d_x,iRec,myIter,myThid)          CALL WRITE_REC_XY_RL ('PS',cg2d_x,iRec,myIter,myThid)
   
101  #ifdef ALLOW_NONHYDROSTATIC  #ifdef ALLOW_NONHYDROSTATIC
102          IF (nonHydroStatic) THEN          IF (nonHydroStatic) THEN
103           CALL WRITE_REC_XYZ_RL( 'PNH',cg3d_x,iRec,myIter,myThid)           CALL WRITE_REC_XYZ_RL( 'PNH',cg3d_x,iRec,myIter,myThid)
104          ENDIF          ENDIF
105          CALL WRITE_REC_XYZ_RL( 'W',wVel,iRec,myIter,myThid)          CALL WRITE_REC_XYZ_RL( 'W',wVel,iRec,myIter,myThid)
106  #endif  #endif /* ALLOW_NONHYDROSTATIC */
107    #else
108    C       Write each snap-shot as a new file (original and default method)
109    C       - creates many files but for large configurations is easier to
110    C         transfer analyse a particular snap-shots
111            WRITE(suff,'(I10.10)') myIter
112            CALL WRITE_FLD_XYZ_RL( 'U.',suff,uVel,myIter,myThid)
113            CALL WRITE_FLD_XYZ_RL( 'V.',suff,vVel,myIter,myThid)
114            CALL WRITE_FLD_XYZ_RL( 'T.',suff,theta,myIter,myThid)
115            CALL WRITE_FLD_XYZ_RL( 'S.',suff,salt,myIter,myThid)
116            CALL WRITE_FLD_XY_RL( 'PS.',suff,cg2d_x,myIter,myThid)
117    #ifdef ALLOW_NONHYDROSTATIC
118            IF (nonHydroStatic) THEN
119             CALL WRITE_FLD_XYZ_RL( 'PNH.',suff,cg3d_x,myIter,myThid)
120            ENDIF
121            CALL WRITE_FLD_XYZ_RL( 'W.',suff,wVel,myIter,myThid)
122    #endif /* ALLOW_NONHYDROSTATIC */
123    #endif /* MULTIPLE_RECORD_STATE_FILES */
124    
125           _END_MASTER( myThid )           _END_MASTER( myThid )
126           _BARRIER           _BARRIER
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