Configuring Pattern Matching Distribution Algorithm

Directory Proxy Server distributes the requests to data views based on the match between the parameters of the requests and one or more patterns. Set the following parameters to configure the Pattern matching distribution algorithm:

• pattern-matching-base-object-search-filter pattern-matching-base-object-search-filter(5dpconf)

• pattern-matching-dn-regular-expression pattern-matching-dn-regular-expression(5dpconf)

• pattern-matching-one-level-search-filter pattern-matching-one-level-search-filter(5dpconf)

• pattern-matching-subtree-search-filter pattern-matching-subtree-search-filter(5dpconf)

The configuration attributes that end with filter are LDAP filters, not regular expressions. These LDAP filters are evaluated against LDAP filters contained in the incoming search requests.

For example, use the following settings to configure the Pattern Matching distribution algorithm to send the requests for the users with even uid to even data view and the users with odd uid to odd data view.

$ dpconf set-ldap-data-view-prop even
pattern-matching-base-object-search-filter:'|(uid=\2a)(uid=*0)(uid=*2)\
(uid=*4)(uid=*6)(uid=*8))'\
pattern-matching-one-level-search-filter:'|(uid=\2a)(uid=*0)(uid=*2)\
(uid=*4)(uid=*6)(uid=*8))'\
pattern-matching-subtree-search-filter:'|(uid=\2a)(uid=*0)(uid=*2)\
(uid=*4)(uid=*6)(uid=*8))'\
pattern-matching-dn-regular-expression:'uid=[0-9]+[02468]'
distribution-algorithm: pattern-matching 

$ dpconf set-ldap-data-view-prop odd
pattern-matching-base-object-search-filter:'|(uid=\2a)(uid=*1)(uid=*3)\
(uid=*5)(uid=*7)(uid=*9))'\
pattern-matching-one-level-search-filter:'|(uid=\2a)(uid=*1)(uid=*3)\
(uid=*5)(uid=*7)(uid=*9))'\
pattern-matching-subtree-search-filter:'|(uid=\2a)(uid=*1)(uid=*3)\
(uid=*5)(uid=*7)(uid=*9))'\
pattern-matching-dn-regular-expression:'uid=[0-9]+[13579]'
distribution-algorithm: pattern-matching 

In the (uid=\2a) expression, the \2a is an ASCII representation of * where 2 and a are two hexadecimal digits. The (uid=\2a) expression makes sure that the data view accepts the requests for all uids.

The syntax supported by the pattern matching algorithm is specified by the Java Pattern class (documented at http://java.sun.com/j2se/1.4.2/docs/api/java/util/regex/Pattern.html). This syntax is not the same as the usual regex syntax.