Automatic Updates

Application Center provides two types of automatic synchronization: change-based and interval-based. Using automatic updates enables you to keep content and configuration settings consistent across your cluster without requiring your intervention.

 Notes

Change-Based Synchronization

Application Center receives notification if the synchronized content (except for COM+ applications, CAPI store information, and ACL changes) is changed on the cluster controller. When changes are detected, the changed files are synchronized to all members in the synchronization loop.

These changes are made based on change notification for specific files. Only the files for which Application Center receives change notification are synchronized. In this way, the content on members is kept identical by using only a minimum of resources. Web sites and applications are constantly available to users during change-based synchronization.

You can disable change-based synchronization on the cluster_name Properties dialog box by clearing the Synchronize members when content is updated check box or by using command-line command AC DEPLOY /DISABLESYNC.

Interval-Based Synchronization

Periodically, Application Center synchronizes all Application Center applications (except for COM+ applications) to ensure that the content is identical across the cluster. You can set the interval between interval-based synchronizations in the Periodic full synchronization interval (minutes) box in the cluster_name Properties dialog box. This setting is 60 minutes by default.

All content and settings are checked for changes and all changes (except for COM+ applications and global ISAPI filters) are synchronized across the cluster. In this way, the content and settings on members are kept identical.

You can disable interval-based synchronization in the cluster_name Properties dialog box by clearing the Synchronize members when content is updated check box or by using the command-line command AC DEPLOY /DISABLESYNC.

Related Topics

• For more information about Application Center applications, see Application Fundamentals.

• For more information about deploying or synchronizing COM components and COM+ applications, see Deploy and Synchronize COM and COM+.

• For more information about deploying and synchronizing global ISAPI filters, see Deploy Global ISAPI Filters.

• For more information about adjusting the full synchronization interval, see Set the Synchronization Interval.

• For more information about synchronization exclusions, see Synchronization Exclusions.

• For more information about using the command-line utility, see Command-Line Administration.

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