Additional records in the log stream copy

When a log stream copy (DWWLC) is performed, the records in the MVS™ log stream are copied to a sequential data set. In addition to the records in the MVS log stream, DWWLC writes two additional records to the output file, the first record and the last record, both called LOGI records.

The layout of the LOGI record is as follows:

Figure 1. LOGI record
1 LOGI                                                               
  2 LOGITYPE       	   CHAR(4)  , /* >DWW                        */ 
  2 LOGIVERS           FIXED(31), /* 0001                        */ 
  2 *                  CHAR(8)  , /* RESERVED                    */ 
  2 LOGIBLKID          CHAR(8)  , /* BLOCKID                     */ 
  2 *                  CHAR(8)  , /* RESERVED                    */ 
  2 LOGITIME                    , /* TIME BLOCK                  */ 
    3 LOGIGMT          CHAR(8)  , /* TIME BLOCK WRITTEN GMT   TOD*/ 
    3 LOGILOCAL        CHAR(8)  , /* TIME BLOCK WRITTEN LOCAL TOD*/ 
  2 *                  CHAR(8)  , /* RESERVED                    */ 
  2 LOGINAME           CHAR(26) , /* MVS LOG NAME                */ 
  2 *              	   CHAR(6)  , /* RESERVED                    */ 
  2 *                  CHAR(16) ; /* RESERVED                    */  

Use a precopy exit if you want to examine the records before they are written to the output data set.


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Timestamp icon Last updated: Friday, 7 February 2014


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