IBM DB2 LUW UDB DBA Training by www.etraining.guru

Editor's Notes

• #2: http://www.ibm.com/developerworks/data/library/techarticle/dm-0509poon/
• #5: Instance = Database(s) + Processes/Threads
• #6: Instance view: A bit more detailed!
• #7: Pre-requisites as of DB2 9.7!
• #8: Instance IDs should not be root or have password expired.
• #10: DB2DIR: DB2 installed location. You can find this using db2ls command http://www-01.ibm.com/support/knowledgecenter/SSEPGG_10.5.0/com.ibm.db2.luw.qb.server.doc/doc/c0050566.html The instance directory stores all information that pertains to a database instance. You cannot change the location of the instance directory once it is created. The directory contains: The database manager configuration file (db2systm) The system database directory The node directory The node configuration file (db2nodes.cfg) Any other files that contain debugging information, such as the exception or register dump or the call stack for the DB2 database processes. The installation process creates a default DB2 instance, which is defined by the DB2INSTANCE environment variable. However, instances can be created/dropped after installation.
• #14: Auto starting Instances: db2iauto -on instance_name On LUW, an instance created by using db2icrt is set as a manual start.
• #15: ps -ef | grep ^db2inst1 | egrep -v "bash|sshd|grep"
• #16: ps -ef | grep ^db2inst1 | egrep -v "bash|sshd|grep“ reset dbm cfg: Resets the DBM configuration file to its default values Location of DBM CFG file: ./sqllib/db2systm Link: https://www.columbia.edu/sec/acis/db2/db2d0/db2d0160.htm
• #18: Instance node level profile registry: For partitioned databases **** To display help information for the command, use: db2set ? To list the complete set of all supported registry variables, use: db2set -lr To list all currently defined registry variables for this session, use: db2set To show the current session value of a registry variable, use: db2set registry_variable_name To delete the current session value of a registry variable, use: db2set registry_variable_name= To change a registry variable for this session only, use: db2set registry_variable_name=new_value To change a registry variable default for all databases in the instance, use: db2set registry_variable_name=new_value -I instance_name To change a registry variable default for all instances in the system, use: db2set registry_variable_name=new_value -g Note:The two parameters "-I" and "-G" cannot be used at the same time in the same command. To change a registry variable default for a particular node in an instance, use: db2set registry_variable_name=new_value -i instance_name node_number To reset all registry variables for an instance back to the defaults found in the Global Profile Registry, use: db2set -r registry_variable_name To reset all registry variables for a node in an instance back to the defaults found in the Global Profile Registry, use: db2set -r registry_variable_name node_number ***
• #19: Instance node level profile registry: For partitioned databases **** To display help information for the command, use: db2set ? To list the complete set of all supported registry variables, use: db2set -lr To list all currently defined registry variables for this session, use: db2set To show the current session value of a registry variable, use: db2set registry_variable_name To delete the current session value of a registry variable, use: db2set registry_variable_name= To change a registry variable for this session only, use: db2set registry_variable_name=new_value To change a registry variable default for all databases in the instance, use: db2set registry_variable_name=new_value -I instance_name To change a registry variable default for all instances in the system, use: db2set registry_variable_name=new_value -g Note:The two parameters "-I" and "-G" cannot be used at the same time in the same command. To change a registry variable default for a particular node in an instance, use: db2set registry_variable_name=new_value -i instance_name node_number To reset all registry variables for an instance back to the defaults found in the Global Profile Registry, use: db2set -r registry_variable_name To reset all registry variables for a node in an instance back to the defaults found in the Global Profile Registry, use: db2set -r registry_variable_name node_number ***
• #20: %ia: If instance attachment exists, the authid of the current instance attachment; otherwise a null string %i: Local alias of instance %da: If database connection exists, the authid. Else, null string %d: Database aliase %n: New line character