DB2 UDB provides an API for importing data from files exported using the
export tool. This provides an option to do importing programmatically by using
sqlutil.h, and a method sqluimpr.
The DB2MOVE utility
Data can be copied using the DB2
EXPORT
and
IMPORT
utilities. But a more
efficient way to copy an entire DB2 UDB database is by using the DB2
db2move
utility. This utility queries the system catalog tables for the specified database,
and exports the table structure and contents of each table found to a PC/IXF
formatted file. These files can be used to populate another DB2 UDB database. It
can be run in three modes:
EXPORT mode
In this mode, the
db2move
utility invokes DB2
EXPORT
utility to extract data from
one or more tables and write to PC/IXF formatted files. It also creates a file
named db2move.lst
that contains the names of all tables exported and the
names of the files that the table s data was written to.
EXPORT
mode can be
used as below:
bash>db2move itsodb2 export
IMPORT mode
In this mode, the
db2move
utility invokes DB2
IMPORT
utility to recreate tables
and indexes from data stored in PC/IXF formatted files. The file db2move.lst
generated in
EXPORT
mode can be used to get information about tables in the
exported files. The above exported files can be imported using:
bash>db2move itsodb2 import
LOAD mode
In this mode, the
db2move
utility invokes DB2
LOAD
utility to populate tables
that already exist with data stored in PC/IXF formatted files. The file
db2move.lst
generated in
EXPORT
mode can be used to get information about
tables. The above exported files can be loaded using:
bash>db2move itsodb2 load l /home/itso/backup
8.4 High availability
High availability is a business requirement on the system to provide services all
the time, and survive disaster, system crash, and glitches without or with minimal
interrupting of the service. This is achieved by a number of techniques like online
management of the database system, advanced instance management,
suspended I/O, and clustered servers.
246
MySQL to DB2 UDB Conversion Guide
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