Brocade Communications Systems ServerIron ADX 12.4.00 Service Manual download pdf (Page 131)

ServerIron ADX Advanced Server Load Balancing Guide 119

53-1002435-01

Cache Persistence using URL Hashing

NOTE

Since hash-persist action is a secondary action, you must add a forward action as shown in the

following example, before adding a hash-persist action.

ServerIronADX(config)# csw-policy p1

ServerIronADX(config-csw-p1)# match r1 forward 1

ServerIronADX(config-csw-p1)# match r1 hash-persist url search-url “v=” offset 0

Syntax: [no] hash-persist url search-url <pattern-string> offset <offset-value>

The contents of the <pattern-string> variable are used to define the starting place on the URL

string. If the URL string has multiple such pattern strings, only the first one will be used. If the

pattern string is not found, the system will abort the rest of the searching steps, and choose the

default hashing method. If the pattern string is found, the system will start the second step after

skipping the length of the pattern string. The second step in the process is to adjust the starting

place on the URL string by moving it by the number of characters defined by a value specified in the

<offset-value>. If the pattern string is empty, the system will not search the pattern part, and use

the beginning of URL string as the start point of the third step.

The <offset-value> is used to define how many characters will be skipped after the start point that

is defined by the pattern-string. Normally this value is 0 (zero) which places the start point directly

after the pattern string. A negative value can be used to move the starting place to the left in the

URL string. If the <offset-value> is greater than the length of the rest of the URL string, the system

will abort the rest of the searching steps, and start the next search (if configured). If another search

isn’t configured, the default hashing method is used. If the value of the <offset-value> variable is

within the length of the rest of the URL string, the system will skip to the offset place, and start the

third step.

With this command, the third step is for the system to look to the end of the URL to define the string

used for hashing.

Parsing using the “pattern string” with a delimiter

The following example identifies a pattern string to perform hashing on with an offset of “0” and a

delimiter with the value “&”.

NOTE

Since hash-persist action is a secondary action, you must add a forward action as shown in the

following example, before adding a hash-persist action.

ServerIronADX(config)# csw-policy p1

ServerIronADX(config-csw-p1)# match r1 forward 1

ServerIronADX(config-csw-p1)# match r1 hash-persist url search-url “v=” offset 0

delimiter “&”

Syntax: [no] hash-persist url search-url <pattern-string> offset <offset-value> delimiter

<delimiter-string>

The contents and operation of the <pattern-string> variable is the same as described in “Parsing

using the “pattern string” only”.

The contents and operation of the <offset-value> is the same as described in “Parsing using the

“pattern string” only”.

1 2 ... 126 127 128 129 130 131 132 133 134 135 136

Comments to this Manuals

No comments

Brocade Communications Systems ServerIron ADX 12.4.00 Service Manual Page 131

Comments to this Manuals

Related products and manuals for Network switches Brocade Communications Systems ServerIron ADX 12.4.00