Brocade Communications Systems ServerIron ADX 12.4.00 Service Manual Page 83

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ServerIron ADX Advanced Server Load Balancing Guide 71
53-1002435-01
Content aware cache switching
2
Basic example of content aware cache switching
The diagram in Figure 19 illustrates a configuration that uses content aware cache switching to
cache GIF files on one set of cache servers and different kinds of files on another set.
In this configuration, cache group 1 consists of three cache servers. CacheServer1 and
CacheServer2 are allocated to server group ID = 1, and CacheServer3 is allocated to server group
ID = 2. The ServerIron ADX has CSW policies in place that cause HTTP requests to be directed to
the cache servers as follows:
HTTP requests containing URL strings that end with the text "gif" are sent to one of the cache
servers in server group ID = 1.
If a URL string does not end with the text "gif", the HTTP request is sent to the cache server in
server group ID = 2.
FIGURE 19 Content aware cache switching
The first time a client requests a URL that ends with "gif" (for example, /home/main/banner.gif) the
following events take place.
Internet
CacheServer1
192.168.1.101
SI
RAS
BAR
CacheServer2
192.168.1.102
CacheServer3
192.168.1.103
Server Group ID=1
Cache Group 1
Server Group ID=2
Client requests for URLs that end with gif
are directed to one of the cache servers
in this server group
Client requests for all other URLs
are directed to the cache server in
this server group
Web Queries
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