What are the differences in Clustering in SQL Server 2005 and 2008 or 2008 R2?



What are the differences in Clustering in SQL Server 2005 and 2008 or 2008 R2?..

Answer / Shivangi Rastogi

SQL Server 2008 and 2008 R2 introduced several improvements to clustering compared to SQL Server 2005. Here are some key differences:

1. Network protocols: In SQL Server 2005, only TCP/IP network protocol was supported for cluster communications. Starting from SQL Server 2008, other protocols like Named Pipes and NetBIOS over TCP/IP can also be used for cluster communications.
2. Cluster resource types: SQL Server 2008 introduced a new resource type called 'SQL Server Application Resource' which allows you to manage multiple SQL Server instances as a single entity within the failover cluster. This feature is not available in SQL Server 2005.
3. Cluster Shared Volumes (CSV): CSV was first introduced in Windows Server 2008 and is supported by SQL Server 2008 and later versions. CSV allows for better I/O performance and scalability when using cluster shared disks to store data.
4. Failover Cluster Manager: The Failover Cluster Manager in SQL Server 2008 has a new user interface that provides more detailed information about the health of the cluster resources, as well as improved management capabilities.

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