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Status Planned for future release
Workspace Product Master
Created by Guest
Created on Aug 8, 2019

$TOP/src/db/scripts/backup/db2_fast_import.sh does not currently accommodate a DB2 HADR environment

The IBM Knowledge Center content  currently does not indicate support for a DB2 HADR environment.   

Background:
Our db2_fast_import.sh performs an embedded DB2 load command as such:
db2 "load from ${IXFFILE} of IXF modified by pagefreespace=0 savecount 100000 messages ${MSGFILE} replace into ${TABLENAME} statistics use profile nonrecoverable indexing mode rebuild" >> load_${DBUSER}.log

When a HADR configuration is set up in DB2, there is a DB2 registry variable that controls this above COPY FLAG for DB2 loads that are nonrecoverable.  The DB2 registry is BLOCKNONLOGGED and by default is set to NO.  However in a HADR environment this parameter MUST be set to YES for logging to the standby database server.   A simple check of this registry can be done with:  

$ db2 connect to

$ db2 get db cfg for | grep BLOCKNONLOGGED


Other important detail:

For a DB2 load to work against a HADR environment 
 
  • You would need to include the 'COPY YES' with the load command
  • Remove the 'nonrecoverable' and add copy yes to
or
  • to remove the nonrecoverable in DB2 load command
  • set  the DB2_LOAD_COPY_NO_OVERRIDE for the instances (the default is COPY NO) 

Bottom line is the DB2 load can't be unrecoverable in a DB2 HADR environment  - this will cause the standby DB2 server to be useless if a takeover occurs. 
 
$ db2 get db cfg for sample | grep -i block
Block log on disk full                (BLK_LOG_DSK_FUL) = NO
Block non logged operations            (BLOCKNONLOGGED) = NO

$ db2 "load from t2.del of del insert into t2"
--> OK

$ db2 update db cfg  for sample using BLOCKNONLOGGED YES
DB20000I  The UPDATE DATABASE CONFIGURATION command completed successfully.

db2 "load from t2.del of del insert into t2"
SQL2032N  The "COPY FLAG" parameter is not valid.  SQLSTATE=22531


$ db2 update db cfg for sample using BLOCKNONLOGGED NO
DB20000I  The UPDATE DATABASE CONFIGURATION command completed successfully.

$ db2 "load from t2.del of del insert into t2"
--> OK
 

Reference:  RTC 113705

Needed by Date Nov 1, 2019