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For details on setting up and using this new feature, see the "DIGITAL Clusters for Windows NT Administrator's Guide Addendum".
∙DCNT Elimination of Client Software Requirement
Clients do not need to install cluster client software if they plan to access only
Compaq recommends that you configure IP failover for new cluster installations. IP failover offers the following advantages:
∙Eliminates the need to install cluster client software. On a large network, this saves both time and disk space.
∙Eliminates the possibility of compatibility problems between the cluster client software and 3rd party networking products.
Note: One example of a product that previously conflicted with the cluster client software was Citrix WinFrame, which should be supported in a clustered environment, according to Clusters product management.
∙Allows WAN access to NTFS file shares.
You can install cluster client software on Windows NT, Windows 95, and Windows for Workgroup systems that need to access the cluster by using the cluster name alias.
∙DCNT SQL Server Support Enhancements
∙Any DCNT stored procedures that are not in the SQL Server master database are automatically detected and installed when the system is rebooted.
∙Uninstalling DCNT deletes all the DCNT stored procedures introduced to your SQL server during DCNT installation.
∙You cannot manually failover groups that contain disks on which unenrolled SQL Server databases reside. With SQL 6.5, attempting to manually failover these groups caused problems. If you attempt it, you will see an error message displayed and the group will remain online on its current server until all the unenrolled databases are enrolled.
∙Before bringing up the Manage SQL Server Databases dialog, the Cluster Administrator fetches information about SQL Server databases. Prior to SP1, the user had to manually refresh if databases had been created since the Cluster Administrator was invoked.
∙You can no longer delete nor modify SQL Server failover objects. These operations were no longer necessary in V1.1, but the menu options were still available. Deletion and modification of SQL Server failover objects takes place automatically by using the Manage SQL Server Databases menu choice.
∙In a previous version of DCNT, the user had to create all SQL databases from the same server. This restriction no longer applies.
The SQL server support enhancements, as well as the bug fixes incorporated into SP1, are also available for NT 3.51 installations with DCNT v1.0, in the form of SP3. The IP failover capabilities, along with the elimination of the client software requirement, both require NT 4.0 and DCNT v1.1.
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DIGITAL Server Cluster Kits for Windows NT Configuration Guide
