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If your NDB cannot be stopped for backup because of availability requirements, you can use the journal to keep a current backup copy. A backup copy is created once and the journal is applied to it each time the journal is swapped.
Note: A journal swaps if a JOURNAL SWAP command is issued, or if the current journal runs out of space.
Use the batch forward recovery utility (UTIL0010) to apply the journal. The name of the journal to be applied can be determined using the &ZJRNALT system variable. The sample batch forward recovery JCL ($NDUT010) is available in the distribution library and must be tailored using the installation data set names.
Whenever a journal swap occurs, an NCL procedure is started in the BSYS environment to assist in the automation of forward recovery. The name of this procedure is specified using the SYSPARMS JRNLPROC command (default is $NDJPROC). Use this procedure to submit your NDB forward recovery JCL.
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