Being
the fundamental function for managing a website, load balancers don’t
run well without being configured properly. Loan balancing basically
divides the amount of work that a computer has to do between two or
more computers to ensure that more work gets done in the same amount
of time and, all users get served faster. Here are a few ways to
optimize the functioning of load balancers.
• Establish
the application session type
Many
load balancers have numerous types of persistent sessions, like
shopping carts or other types of applications. It's often better to
use persistent sessions, if an application makes calls to other
servers. Whenever a persistent connection is used, even if the user
session is moved from one server in the pool to another, the back-end
connection to the database needs to be preserved. For this, the load
balancer maintains a session information for all users and decides
how long to keep user sessions alive. While many persistent sessions
can use up memory resources on the load balancer, it is best to set a
maximum session length.
• Be
prepared for emergencies
When
servers are unavailable, configure e-mail and SNMP trap alerts for
major incidents.This helps detect the difficulty in the system and
provides information when the environment is degraded. To ensure that
hardware problems don't take the system completely offline, weigh the
cost and complexity issues of clustering or other high-availability
solutions. IT managers can script tests for each server in a
load-balancer pool to make sure that if the load on that server
will be transferred to another server in the pool server, if the
service stops responding.
• Determine
the network activity
Capture
the bandwidth used by each service, the hits on each service, so that
this data offers a historical perspective on network traffic. This
can enable IT managers to recognize the trends and proactively add
capacity whenever required to keep from overloading the system.
Measuring the network activity can also help in detecting problems
when they occur.
• Restrict
the traffic
With
the help of access lists, restrict the traffic going through the load
balancer. Although server groups actually have multiple servers to
handle to high volumes of traffic, it is server
load balancing that
aids in the allocation of traffic across network servers in a
more or less even spread, thereby ensuring that there is no overload
of one server.
Load
balancers can
intelligently analyze the wide area connections and accordingly
allocate bandwidth, for business-critical applications. As load
balancing appliances have
the potential to handle more than one function, use the right
load balancing techniques to optimize system performance through
higher application
availability and
scalability.
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