IBM Books

Image, Audio, and Video Extenders Administration and Programming


How the DB2MMDATAPATH environment variable is used (EEE only)

The DB2 extenders use the DB2MMDATAPATH environment variable to resolve locations for various operations in a partitioned database environment. For example, the DB2 Image Extender uses the value of DB2MMDATAPATH to store QBIC data in a partitioned database environment.

You set DB2MMDATAPATH when you create a DB2 extenders instance, as described in DMBICRT and in the following installation "readme" files:

One example of how DB2MMDATAPATH is used is in storing QBIC feature and index data. In UNIX, the DB2 Image Extender stores this QBIC data in the following directory:

db2mmdatapath /NODEnode_num/QBIC/database_name

where db2mmdatapath is the value of the DB2MMDATAPATH environment variable, node_num is the node number, and database_name is the database name.

Consider the following AIX example. Suppose DB2MMDATAPATH is set to /localfs/dmbdata. Suppose too that a database named sample is partitioned in nodes 0, 2, and 5. QBIC data will be stored for the sample database in the following directories:

Node 0: /localfs/dmbdata/NODE0000/QBIC/sample

Node 2: /localfs/dmbdata/NODE0002/QBIC/sample

Node 5: /localfs/dmbdata/NODE0005/QBIC/sample


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