Instruction manual

Chapter 1: Introduction to the NetScaler 9000 Series
NetScaler 9000 Series Installation and Configuration Guide - Volume 1 1-15
NSICG60_JAN05
freeing up resources for new requests. This also permits the NetScaler 9000
system to optimize the TCP parameters for each of these clients and fully
manage any retransmissions of dropped packets.
1.5.3.5 Consolidated Web Logging
The NetScaler 9000 system's web server logging feature offloads the logging
function from a server or cache to central location. When configured for
consolidated web server logging, the NetScaler 9000 system tracks client
activity on all of the web servers or virtual web servers to which it is
connected. It can record client activity in a single file or in separate log files.
The NetScaler 9000 system supports three different log file formats for
displaying data in the log files: W3C Extended log file format, NCSA
Common log file format or Custom log format.
1.5.3.6 Application Caching
NetScaler’s Application Caching option helps to optimize the delivery of web
content and application data by providing a fast in-memory HTTP/1.1 and
HTTP/1.0 compliant web cache for both static and dynamic content. This
on-board cache stores the results of incoming application requests even when
an incoming request is secured or the data compressed, and then reuses the
data to fulfill subsequent requests for the same information. By serving data
directly from the on-board cache, the NetScaler 9000 system can eliminate the
need to funnel static and dynamic content requests to server infrastructure –
offloading servers and reducing page regeneration times.
1.5.4 Application Switching Features
The NetScaler 9000 system includes the following traffic switching features:
z Load Balancing
z Content Switching
z Cache Redirection
z Global Server Load Balancing
z Link Load Balancing
1.5.4.1 Load Balancing
NetScaler’s load balancing feature manages traffic at the request level
resulting in more uniform traffic distribution across systems, compared to the