Seagate ST43401N/ND Przewodnik Instalacji Pobierz pdf (Strona 42)

Determine Migration Approach

See Chapter 7, “Test: Ensuring Stability and Performance” for more

information on testing.

Bridging

There should not be any user impact during migration. The more stringent the

validation test is, the less likely you will have bridging issues.

The earlier server cannot read release 12.5 backup files. You need to create bcp

or other scripts to move tables back to pre-release 12.5.

Note Do not use release 12.5 schema enhancements until the conversion

succeeds.

Environment

Be sure to account for any increased release 12.5 memory requirements that

apply to your configuration. For more information, see:

•The installation guide at http://manuals.sybase.com:80/onlinebooks/group-

as/asp1250e/@Generic__CollectionView;pt=asp1250e

for your platform. It

gives basic RAM requirements.

• Chapter 6, “Implement: Making Database Administration Changes”.

• Details on configuring memory and data caches in the

System

Administration Guide at http://manuals.sybase.com:80/onlinebooks/group-

as/asg1250e/sag/@Generic__BookView

• Information on how to configure memory for performance in the

Performance and Tuning Guide at

http://manuals.sybase.com:80/onlinebooks/group-

as/asg1250e/perf/@Generic__BookView

Here are some additional tips:

• Execute performance measurements on a system with similar capabilities.

• For a production system, execute the performance suite during off hours.

Scheduling

For a development system, you may want to add a short period to the

development schedule for release 12.x issues.

For a production system, be prepared to postpone or back off if needed.

Be sure to notify users when you will be taking applications or databases

offline.

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Seagate ST43401N/ND Przewodnik Instalacji Strona 42