IBM Tivoli Monitoring > Version 6.3 Fix Pack 2 > Installation Guides > Installation Guide > Tivoli Data Warehouse solutions: common procedures
IBM Tivoli Monitoring, Version 6.3 Fix Pack 2
Install multiple Warehouse Proxy Agents
IBM Tivoli Monitoring supports multiple Warehouse Proxies within a single hub monitoring server environment. The provision for multiple warehouse proxies provides for greater scalability and performance in historical data collection.
More importantly, use multiple proxies enhance reliability via their failover mechanism: if a Warehouse Proxy is unavailable, data can be inserted into the warehouse by a different Warehouse Proxy Agent (if the agents are configured properly for failover).
The support for multiple Warehouse Proxy Agents has the following important features:
- All Warehouse Proxy Agents within a single hub monitoring server environment export data to a single Tivoli Data Warehouse.
- Each Warehouse Proxy Agent is associated with a subset of monitoring server instances that you specify when you configure the proxy agent. Each Warehouse Proxy exports data only for monitoring agents that report to one of the monitoring servers (hub or remote) on the specified list. Alternatively, a given Warehouse Proxy Agent can be configured to service any monitoring server. This is important for backward compatibility and for configuring failover.
The following sequence of events explains how the monitoring agents, which collect the data for historical reports, know which Warehouse Proxy Agent to use:
- When a Warehouse Proxy Agent starts, it registers with the Global Location Broker on the hub monitoring server, sending it the list of monitoring servers that it is configured to serve, or an indication that the Warehouse Proxy Agent can service any monitoring server. This registration process is repeated every hour.
- Each monitoring server queries the Global Location Broker at regular intervals to determine which Warehouse Proxy it is associated with. The monitoring server then sends the address of this Warehouse Proxy to all of its child monitoring agents to use during historical data exports. You can change the default query interval of 60 minutes to some other value.
When a Warehouse Proxy Agent registers with the Global Location Broker, it is registered as the default proxy agent if no other proxy agent is already configured as the default. When a monitoring server queries the Global Location Broker for its associated Warehouse Proxy, the default proxy agent is used if that monitoring server is not on the list of servers for any proxy agent.
- Set a permanent socket address for a proxy agent
In some network environments, use of the Global Location Broker default registration algorithm is not supportable and a specific monitoring server variable must be used.
- Verify the configuration
Use the procedures in this section to verify the configuration and to determine which Warehouse Proxy a particular monitoring server uses for its agents.
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Tivoli Data Warehouse solutions: common procedures