File Segment Example

In this example, the segmented file consists of a host segment limited to 500 MB, a second segment limited to 1 GB, and a final segment unlimited in size. However, the file will not be a HUGE file, so the total size will be limited to 4 GB.

XCREblk creblk  = {

          0,    /* FILEPOS8 is NOT on: not HUGE              */

        500,    /* 1st segment size is 500MB                 */

          0,    /* no specified file size limit (HW)         */

          0,    /* no specified file size limit (LW)         */

  104857600,    /* file created at size 100MB                */

   10485760,    /* file extend 10MB at a time                */

          3,    /* maximum number of segments is 3           */

          0     /* no disk full threshold                    */

};

SEGMDEF segdef[2] = {

  {"d:dataseg.2",1024},   /* 1024MB = 1GB size limit         */

  {"e:dataseg.3",0}       /* no limit on segment size        */

};

/* create data file, specifying the host segment size        */

  CreateDataFileXtd8(

               10,  /* data file number                      */

  "c:hostseg.dat",  /* data file name                        */

              384,  /* record length                         */

                0,  /* creblk specifies large extent sizes   */

           TRNLOG,  /* support transaction processing        */

               0L,  /* no permission mask                    */

             NULL,  /* no group ID                           */

             NULL,  /* no password                           */

         &creblk);  /* pointer to extended create block      */

/* specify definitions for the two other segments            */

  SetFileSegments(

           10,  /* data file number                          */

            1,  /* one active segment (the host segment)     */

            2,  /* two segment definitions to be passed      */

      segdef);  /* pointer to the segment definitions        */