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echoMountain offers an optional Server Load Balancing service to our customers. This service utilizes efficient Server Load Balancing (SLB) to transparently balance traffic among multiple servers while continuously monitoring server, application and content health. This enhances overall reliability and availability of the services while simultaneously ensuring server farm accessibility.
Our Server Load Balancing architecture is built on Foundry Networks ServerIron 450 switches which support the highest density gigabit density for massively scalable gigabit server farms and blade server farms. The ServerIron 450 switches provide the foundation for high service availability, disaster recovery, and location and server transparency for consistent user experience. The ServerIron switches maximize application availability and provide robust security by defeating many forms of Denial of Service (DoS), Virus and Worm attacks. These switches act as a reliable last line of defense for mission-critical server farms and applications.
These intelligent load balancing, Layer 7 content switches offer high density Gigabit connectivity for highly scalable server farms and support for an industry leading 15,000,000 concurrent user sessions and over 300,000 new connections per second with 56 Gbps of throughput. Combined with our multi-path Gigabit network architecture, echoMountain provides a world class infrastructure for your mission critical server farms.
echoMountain utilizes Foundry Networks ServerIron 450 switches to support the following key internet traffic management applications:
- Efficient Server Load Balancing (SLB) — Distribute IPbased
services and transparently balance traffic among
multiple servers while continuously monitoring server,
application and content health. This enhances overall
reliability and availability of the services while simultaneously
ensuring server farm accessibility.
- Intelligent Application Content Inspection and
Switching — Avoid replicating application content and
functions on all servers. Scale and optimize performance for
targeted application needs, and increase ROI of the servers
and applications. Defeat application level attacks by using
deep content inspection and filtering of application messages
containing malicious content. Support highly flexible
clustering and client connection persistence solutions using
advanced cookie and content switching.
- Robust Application Security—Shield server farms and
applications from wire-speed multi-Gigabit rate DoS,DDoS,
virus and worm attacks while serving legitimate application
traffic. Improve security using IronShield™ security suite
with support for features like advanced ACLs and sFlow
- Disaster Recovery and Global Server Load Balancing
(GSLB) — Distribute services transparently across multiple
sites and server farm locations and balance the traffic across
those sites/servers on a global basis while monitoring
site/server and application health. By directing the client to
the best site for the fastest content delivery, ServerIron
enhances overall application availability and reduces
bandwidth costs. Site level redundancy and rapid transparent
failover are supported for disaster recovery. ServerIron redirects client traffic globally by site availability,
site load, and site response time. ServerIron also measures
client/server proximity as defined by round trip delay and
geographic location. All these features can work in
conjunction with the network’s existing DNS servers and
results in minimizing network disruption when implementing
GSLB.ServerIron continually monitors the sites to detect any
changes in servers or services due to varying health and traffic
conditions. Configurable site load thresholds enable network
administrators to fine tune the health checking parameters to
best suit the site’s server and service capabilities.
- Extensive choice of load balancing methods like round robin, response time, least connections, weighted percentage, combined least connections and response time, and bandwidth load balancing for customizing application performance and end user response time.
- Comprehensive health checks to servers and applications to detect
downed resources in real time and redirect users.Highly flexible
and customizable health checks using layer 2,3,4 and 7, and
boolean and scripted health checks.Layer 7 health checks can
include the following:HTTP,DNS,SMTP,POP3,LDAP,
NNTP,IMAP4,FTP,Telnet,RADIUS, and others.
- Simplified server farm management with automatic detection
of downed resources and redirecting users, support for graceful
shutdown of servers for maintenance, and slow start to bring
new servers up to full capacity.
- Remote Backup Servers — If no local servers or applications are
available, ServerIron sends client requests to remote servers.The
remote server can be another server farm managed by ServerIron
switches or just another group of real servers. By defining multiple
remote servers, ServerIron will load balance the traffic among them
using the selected load balancing method.
echoMountain's Server Load Balancing infrastructure provides the following key benefits:
- Improved Application Performance— ServerIron Layer 4-7 switches,with their intelligent applicationaware
load balancing and content switching, significantly
improve application performance by optimally utilizing all
available server resources. Foundry load balancing switches
perform highly flexible real-time health checks to the servers and
use the information obtained during the health checks to
distribute load efficiently among the servers. Intelligent content
switching capabilities maximize utilization and performance by
eliminating the need to replicate content and application
functions on all the servers.
- Maximum Application Availability — High-performance ServerIron switches provide maximum
availability to applications by intelligently distributing traffic
among all available servers, and dynamically monitoring the
ability of servers and applications running on the servers to
deliver optimal performance. Using customizable health checks
at various levels of granularity like host, port, application and
transaction levels, load balancers transparently react in real time
to increases and decreases in available server capacity by
redistributing client traffic.ServerIron switches can be deployed
in multiple high-availability modes with stateful session
synchronization and failover to preserve client connections
during failures of a ServerIron switch.
- Robust Application and Server Farm Security — With the application and content intelligence built in,
ServerIron switches detect and discard viruses and worms that
spread through application level messages. Legitimate
application traffic is load balanced at high performance while
preventing and defeating attacks.With many intelligent features
and superior performance, industry leading ServerIron switches
reliably protect against many forms of Denial of Service (DoS)
and Distributed DoS (DDoS) attacks.The ServerIron switches
feature the most advanced intelligence and high performance to
defeat wire-speed Gigabit rate DoS attacks up to 5 million attack
packets a second.
- Massive Application and Server Farm Scalability — Scaling applications and server farms is a fundamental
requirement for continued business growth, and is costeffectively
and transparently met by the ServerIron Layer 4-7
switches.These switches provide massive scalability to IP-based
applications by allowing the use of multiple servers with load
balancing and failover.As demand grows, simply add new server
resources and configure the ServerIron switch to use the new
resources. There is no need for forklift upgrades to the server
farms and disruption to applications.