Is Server Virtualization The New Clustering?

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Powerful Solutions For Non-Transaction Based Apps

For non-transaction based apps, look at the increasingly sophisticated third-party monitoring solutions available. See the table below. For example, Lyonesse Software's Double-Take, Steeleye's LifeKeeper, Symantec's Veritas Application Director, and Cassatt's Active Response can monitor both physical and virtual applications running on virtual servers, and notify IT staff when a host or application fails, so that a new virtual instance can be quickly brought online.

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Vendor	Product	Comments
Cassatt.com	Active Response	Monitor, pool, and allocate physical and VM resources
Citrix.com	VMlogix	Automated provisioning
Lyonesse Software (lyonware.co.uk)	Double-Take	Real-time data replication and failover
Microsoft.com	Windows Server 2008 Hyper-V	Virtualization for 64-bit servers
Novell.com	Cloud Manager	Automated, template-based provisioning
Forge	Hardware appliance for one-click failovers
Steeleye.com	LifeKeeper	Data protection, disaster recovery and high availability for Windows, Linux, and VMware
Symantec.com	Volume Replicator	Volume replication over IP networks
Veritas Application Director	Monitor physical and VM workloads
Virsto.com	Virsto One	Virtual storage management
VMware.com	vCloud Director	Lightweight app server and load balancing
vFabrik	Virtual datacenter creation
VM6Software.com	VMex	High-available clustering for Hyper-V

Virtualization and clustering are becoming more interrelated and complementary solutions for IT managers. While the two technologies grew out of different needs and have had different infrastructures, they are now merging and providing a powerful tool for managing more complex workloads in the data center. This is making both more appealing to smaller-sized businesses. "If you can afford the longer failover times for some of your applications, you can get a better level of resiliency and business continuity from virtualization," says Oestreich.