You want to place new entries added through the proxy using LDAP ADD operations into the least used dataset. Do this using an entry-count placement algorithm. To change the placement algorithm from round-robin to entry-count, first create and enable an entry-count placement algorithm configuration object, and then disable the existing round-robin placement algorithm. The batch file, dsconfig.post-setup, contains the dsconfig commands required to create the entry-count placement algorithm and disable the old round-robin algorithm.

The batch file contains comments to explain each dsconfig command.

Note:

In this example, line wrapping is used for clarity. The dsconfig command requires that the full command be provided on a single line.

The batch file itself looks like the following.

root@austin-proxy1:more ../dsconfig.post-setup
           
# This dsconfig operation creates the entry-count placement
# algorithm with the default behavior of adding entries to the
# smallest backend dataset first.
           
dsconfig create-placement-algorithm
--processor-name ou_people_dc_example_dc_com-eb-req-processor
--algorithm-name entry-count --type entry-counter --set enabled:true
           
# Note that once the entry-count placement algorithm is created
# and enabled, we can disable the round-robin algorithm.
# Since an entry-balancing proxy must always have a placement
# algorithm, we add a second algorithm and then disable the
# original round-robin algorithm created during the setup
# procedure.
           
dsconfig set-placement-algorithm-prop
--processor-name ou_people_dc_example_dc_com-eb-req-processor
--algorithm-name round-robin --set enabled:false
          
# At this point, LDAP ADD operations will be forwarded to an external
# server representing the dataset with the least number of entries.
  • Run the dsconfig command using the batch file. 
    root@austin-proxy1: bin/dsconfig --no-prompt \
--bindDN "cn=directory manager" --bindPassword password \
--port 389  --batch-file ../dsconfig.post-setup

    After the batch file has executed, a new entry-count placement algorithm, called entry-count, has been created and the old round-robin placement algorithm, round-robin, has been disabled.

    Batch file '../dsconfig.post-setup' contains 2 commands
           
Executing: create-placement-algorithm --no-prompt
--bindDN "cn=directory manager" --bindPassword pass
--port 1389
--processor-name ou_people_dc_example_dc_com-eb-req-processor
--algorithm-name entry-count --type entry-counter --set enabled:true
    
Executing: delete-placement-algorithm --no-prompt
--bindDN "cn=directory manager" --bindPassword pass
--port 1389
--processor-name ou_people_dc_example_dc_com-eb-req-processor
--algorithm-name round-robin --set enabled:false