By Y V Ravikumar, K M Krishnakumar, Nassyam Basha
So it’s time to improve Oracle Database to model 12c and also you have to opt for the precise procedure whereas contemplating matters equivalent to downtime. This publication explains all the on hand improve and migration tools so that you can opt for the person who fits your surroundings. you can be conscious of the sensible concerns and proactive measures to take to improve effectively and decrease unforeseen concerns. you are going to research top practices and suggestions for upgrading and may research the patching process.
With each unlock of Oracle Database there are new positive aspects and fixes to insects pointed out in earlier models. As each one liberate turns into out of date, current databases have to be upgraded. Oracle Database improve and Migration Methods explains each one approach besides its approach, standards, steps, and identified matters which were noticeable to date. The publication additionally compares the the way to assist you opt for the right kind procedure based on your constraints.
Also integrated during this book:
- Pre-requisite patches and pre-upgrade steps
- Patching to accomplish adjustments on the binary and database point to use computer virus fixes
- Steps for upgrading utilizing latest database backup
- Database downgrade steps in case the upgraded database isn’t appropriate together with your environment
- Steps to improve in a number of environments, together with excessive availability, multi-tenant, and e-business
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Additional resources for Oracle Database Upgrade and Migration Methods: Including Oracle 12c Release 2
Storage Administrator The database upgrade may demand additional storage for testing. Pre-upgrade tests like Real Application Testing require database clones to be created for which additional storage will be required. RAT will perform load testing on the upgraded database. Also, some of the upgrade methods discussed in this book require additional storage to perform a database upgrade. Those methods will create clone databases to reduce the downtime required for an upgrade. The storage administrator will discuss with the database administrator and collect storage requirements such as the type, how much storage, the size, and how much time is needed.
X 24 Chapter 2 ■ Database Upgrade Methods Pre-upgrade Checks Before invoking the DBUA, you should perform the following pre-upgrade checks. This will help you avoid unexpected issues during the upgrade. ÚÚ Install the target database version on the certified platform. Ensure the binaries are in good shape by performing binary relinking. ÚÚ The DBUA is a GUI tool, so if the DBUA is invoked from a remote server, then the display variable has to be set properly in Unix environments to redirect the GUI interface.
This relinking process creates executables by compiling the Oracle binary object files with the operating system (OS) libraries. If the linking between the Oracle software binaries and OS libraries was not done properly, then the executables will not be created appropriately. Also, if some executables in the Oracle Home are removed mistakenly or replaced by incorrect binaries, then the binaries will not be in good shape. The Windows software is delivered in the form of dynamic link libraries (DLLs), relinking does not come into the picture when using Windows.
Oracle Database Upgrade and Migration Methods: Including Oracle 12c Release 2 by Y V Ravikumar, K M Krishnakumar, Nassyam Basha