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What are some of the ways you can move a database from one server to another during an upgrade You can use detach/attach, backup/restore, Copy Database Wizard, or manual methods to move your database from one server to another during an upgrade.
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As noted earlier in this lesson, you need to define the criteria that determine the success of your database upgrade. The success test might be as simple as manually verifying the existence of an object through the graphical user interface (GUI); or it might be a very complex procedure that executes a set of predetermined queries and scripts to verify that all objects exist, that data has successfully imported, that surrounding database objects such as backup jobs operate normally, and that users have full access to the database. However simple or complex the success criteria, you must define the criteria before upgrading to help ensure a successful upgrade. To prepare the success criteria, you should review each phase and step of the overall database upgrade plan and ask yourself several questions. The following questions
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Installing SQL Server 2005
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will help you understand what you need to do to declare that the phase or step is successful:
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How can I measure whether this step is successful How can I test that measurement How can I compare my test results against what they would have been in the old database
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Establishing a Recovery Plan
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Although creating an upgrade plan reduces the likelihood of problems occurring during the upgrade process, problems do arise that can prevent the upgrade process from completing. Most organizations rely heavily on the data contained in their databases, and having that data unavailable due to an upgrade might cause problems in business operations and even have financial implications. You should create a plan to recover from each phase and step of the upgrade process to help minimize data loss and reduce the time that data might be unavailable. This recovery plan might involve backing up a set of files, creating scripts to move database connections from the upgraded instance back to the original instance, or anything else you feel is necessary to get the old database instance back up and meet business uptime needs while you fix the upgrade problems.
Tips for a Successful Upgrade
The following tips can help you perform a secure and successful upgrade:
Create a series of checklists
DBAs and developers should prepare a series of checklists that need to be performed before, during, and after a database upgrade. instance to be upgraded, as well as any application files, script files, extract files, and so on so that you can completely restore them if necessary.
Back up all important files Back up all SQL Server database files from the
Ensure database consistency Run DBCC CHECKDB on databases to be upgraded to ensure that they are in a consistent state before performing your upgrade.
Estimate the disk space required to upgrade SQL Server components, user databases, and any database files that might need to be created during the upgrade process. You might need two to four times the amount of disk space during the upgrade process as you will need after the upgrade is finished.
Reserve enough disk space
Lesson 5: Upgrading to a SQL Server 2005 Installation
Ensure space for system databases
Configure system databases (master, model, msdb, and tempdb) to autogrow during the upgrade process, and make sure that they have enough disk space for this growth.
Ensure that all database servers have login information in the master database before upgrading the database. This step is important for restoring a database because system login information resides in the master database and must be re-created in the new instance.
Transfer login information Disable all startup stored procedures
The upgrade process will usually stop and start services multiple times on the SQL Server instance being upgraded. Stored procedures set to execute on startup might block the upgrade process.
Stop replication
Stop replication and make sure that the replication log is empty for starting the upgrade process. dependencies, might cause the upgrade process to fail if local applications are connected to the instance being upgraded.
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