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Smart Load Monitoring Domain Name Server (SLMDNS) is a DNS based application that provides a way to load balance web traffic across two or more sites in one or more geographic locations.
English (United States)
This text was extracted from a PDF file.
This is the abbreviated version, containing approximately
52% of the total text.
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Smart Load Monitoring Domain Name Server (SLMDNS)
The present invention allows the routing of traffic to the different server farm locations using different types of load balancing methods as follows:
SRR (Smart Round Robin) mode - use with any type of local load balancing solution - internet client requests routed in a round robin fashion - traffic routed to another site if servers not available in one location
SAW (SLMDNS Agent Weight) mode - understands load from Agents on Network Dispatcher local load balancers - resolves client to "best" available location based on site capacity to accept traffic
SWR (Static Weighted Ratio) mode - use with any type of local load balancing solution - load is distributed according to predefined weight at each site
GEO mode - load is distributed based on network proximity - SLM Agent pings source IP address to calculate round trip time to determine best site - sites polled for valid responses
GEO Plus - uses a combination of GEO and SAW methods - load balancing based on network proximity and site weight metrics
Failover - Active backup sites are supported ( 100% traffic to one site, unless there is a failure) - Suitable for Disaster recovery applications
SLMDNS offers some additional advantages. It will enable a customer and IBM to schedule a site outage for content changes and infrastructure maintenance while a "copy" of the Web site remains active and available to users via another USF location. This allows high availability levels while providing proper and routine maintenance for the Web site and the USF infrastructure that suppor...