November 2001
Intermediate to advanced
158 pages
5h 10m
English
Content preview from IBM ESS and IBM DB2 UDB Working Together
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104 IBM ESS and IBM DB2 UDB Working Together
If desired, the FlashCopy can be brought up as a separate database; or, instead of resuming,
the PPRC relationship can be permanently broken, and the split mirror can be brought up as
a separate database.
This configuration can be used as a basis for a home grown high availability (HA) solution,
where the application would have to have knowledge of both systems and decide when to
switch over. By using PPRC to mirror the log directory and containers, the remote site will
always be up to date; however, there will be a performance penalty incurred on the primary
system as each write must be acknowledged on both ESSs before it will return to the caller.
7.4.4 Online local copy
This method is very similar ...
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