Planning for High Availability
0 High availability (HA) is the assurance that your systems will be
"available" when there is demand, and when disaster strikes, those same systems are up and running.
0 Clustering is the use of two or more machines (or nodes) and setting them up in a group where one can failover on the other in the case of a system crash.There are two types of clustering setups: the first is Active/Active, where both nodes are active and handle requests, and when one node fails, the other takes over at half the normal response. The second is Active/Passive, where one node lies dormant awaiting the other to fail. They use a common virtual IP address to achieve transparent failover for a client.
0 Load balancing is the use of two or more nodes to distribute client requests load among the nodes in the group.
Configuring BizTalk Server Groups
0 BizTalk Server groups are configured in the BizTalk Server Administration console.
0 BizTalk Server groups are used to "centrally manage" resources, making administration that much easier.
0 BizTalk Status states are Connected,Tracking connection failed, Shared Queue connection failed, and Tracking and Shared Queue connections failed.
Using the System Monitor
0 The System Monitor is located within the Performance console and is used to monitor the performance of a running system.
0 The System Monitor monitors specific items based on configurable counters that you can add to the monitor to include, and are not limited to CPU, memory, and I/O usage.
0 There are many BizTalk-specific System Monitor counters to monitor documents and BizTalk services.
Integrating with Application Center 2000
0 Application Center 2000 is Microsoft's HA-based platform to help you scale services and applications on your network.
0 Application Center 2000 includes a tool called the Health Monitor, which can aid in centralizing the management of resources.
0 Windows Management Instrumentation, or WMI, is a tool integrated into Windows 2000 (it can also be added to NT and 98) that allows for Web-based management of services.
0 BizTalk uses WMI directly in some of its services to transparently access and use database functions.
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