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Anleitung Zusammenfassung
For example, this can occur when many regional Info Servers send events to a central Info Server through unidirectional gateways and many desktops connect directly to the central Info Server. When an Info Server becomes overloaded, unidirectional gateways cannot insert all events into the Info Server database. Additionally, desktops connected directly to the Info Server further increase the load, especially if a large number of desktops connect simultaneously. The Desktop Info Server architecture: • Reduces the central Info Server's workload by shifting the load to specialized Desktop Info Servers • Improves desktop responsiveness (the time between a desktop user’s action and its reflection in the desktop GUI) • Reduces occurrences of desktop GUI freezing • Improves the end-to-end latency times in heavily-loaded, standard Info Server configurations Note If you implement a DSD architecture, you cannot configure Info Server failover using the failover feature. Cisco Info Center Installation and Configuration Guide, 3.6.1 OL-6349-01 6-1 Chapter 6 Desktop Info Servers Installing a Dual Server Desktop Architecture Desktop Info Server Architecture Overview The Desktop Info Server architecture uses a Master Info Server and one or more Desktop Info Servers to share the duties normally performed by a single Info Server. Alerts appear for operators on a dual server desktop (DSD). The main functionality of the DSD is the same as a standard desktop; for operators, the DSD functions identically to a standard architecture. DSDs connect to a single, Master Info Server when performing writes, but read alert data from Desktop Info Servers. This ensures rapid desktop responsiveness by updating the Desktop Info Servers, while maintaining high data integrity and consistency by simultaneously updating the Master Info Server. Figure 6-1 shows an example DSD architecture. Figure 6-1 Dual Server Desktop Architecture . Desktop Info Server A SQL connection SQL connection Master inf Master infMaster info oo Dual server server Dual server desktop A desktop B Unidirectional gateway IDUC connection IDUC connection Unidirectional gateway 122504 Desktop Info Server B The DSD connects simultaneously to the Desktop Info Server and the Master Info Server. Any user actions (for example, tools or journal actions) performed in the DSD are sent directly to the Master Info Server through a one way SQL connection and are optionally sent to the Desktop Info Server through an IDUC connection. Alerts in the Master Info Server are sent to the DSD through the Desktop Info Server. This is achieved using a unidirectional gateway from the Master Info Server to the Desktop Info Server and an IDUC connection from the Desktop Info Server to the DSD. When users start an Info Desktop, they must select an Info Server to connect to. If the Info Server that the user connects to is configured to use a DSD architecture, then the Info Desktop connects to the Master Info Server when performing write operations but connects to one or more Desktop Info Servers when performing read operations. Installing a Dual Server Desktop Architecture The Cisco Info Server installation program, OINSTALL, automates the process for installing a DSD architecture. When you install the Info Server component, the installation script prompts you whether to install a Dual Desktop architecture. 6-2 Cisco Info Center Installation and Configuration Guide, 3.6.1 OL-6349-01 Chapter 6 Desktop Info Servers Installing a Dual Server Desktop Architecture If you specify installation of a Dual Desktop architecture, you are prompted as to whether the Info Server that you are installing is the Master Info Server in the DSD architecture. You are also asked whether you want to install a DSD on the current host. You can install one or more Dual Server Desktops. You can install the DSDs on the same host that is running the Master Info Server in the DSD configuration or you can install the DSDs on remote hosts. You are also prompted as to whether you want to install the DSD gateway on the same host as the Master Info Server. Normally you install the DSD gateway on the same host as the Master Info Server. Note If you will run the DSD Gateway on the host where you are running the Master Info Server in the DSD architecture, you must select the Gateways component for installation. Desktop Info Server Configuration Considerations When configuring a Desktop Info Server architecture: • One Info Server must be designated as the Master Info Server. • One or more Info Servers can be designated as Desktop Info Servers. • A unidirectional gateway must connect the Master Info Server with each of the Desktop Info Servers. • All users, groups, and roles must be identical in the Master Info Server and Desktop Info Server. Configuring a DSD Architecture with SSL Enabled You can configure a DSD architecture and also configure Secure Sockets Layer (SSL) communication between the DSD components. However, if you are setting up a ...