Poll the new or changed records use DB Adapter in OSB Cluster

Question

Hi！
I have an OSB Cluster which is included two servers: osbServer1 & osbServer2.
I need to poll a view V_TMS_GOODS, and I use the "SequencingPollingStrategy" to implement it. The following is my JCA config:
<adapter-config name="getGoodsInfoFromERP" adapter="Database Adapter" wsdlLocation="getGoodsInfoFromERP.wsdl" xmlns="http://platform.integration.oracle/blocks/adapter/fw/metadata">
<connection-factory location="eis/DB/shaphar" UIConnectionName="shaphar" adapterRef=""/>
<endpoint-activation portType="getGoodsInfoFromERP_ptt" operation="receive">
<activation-spec className="oracle.tip.adapter.db.DBActivationSpec">
<property name="DescriptorName" value="getGoodsInfoFromERP.VTmsGoods"/>
<property name="QueryName" value="getGoodsInfoFromERPSelect"/>
<property name="MappingsMetaDataURL" value="getGoodsInfoFromERP-or-mappings.xml"/>
<property name="PollingStrategy" value="SequencingPollingStrategy"/>
<property name="SequencingColumn" value="LAST_MODIFY_DATE"/>
<property name="PollingInterval" value="60"/>
<property name="MaxRaiseSize" value="50"/>
<property name="MaxTransactionSize" value="unlimited"/>
<property name="NumberOfThreads" value="1"/>
<property name="ReturnSingleResultSet" value="false"/>
<property name="SequencingTable" value="EDI_TRANS_TIMELOG"/>
<property name="SequencingTableKeyColumn" value="TRANS_TYPE"/>
<property name="SequencingTableValueColumn" value="LAST_TRANS_DATE"/>
<property name="SequencingTableKey" value="V_TMS_GOODS"/>
</activation-spec>
</endpoint-activation>
</adapter-config>
The question is:
If I check the "Distributed Polling" box in the JCA Configuration Wizard, the sequence table will have two records for the polling Sequencing, just like the following:
TRANS_TYPE LAST_TRANS_DATE
     V_TMS_CLIENT     2011/12/19 16:23:36     
V_TMS_CLIENT     2011/12/19 16:23:36
If I don't check it, the records is single
And weither I check "Distributed Polling" box or not, the two servers will poll the view twice(one server one times); For example: There are one thousand records in this view, but all the records will be polled twice by the osbServer1 & osbServer2. Finally the client will get tow thousand duplicate records。
So, how can I make a balance with the two servers or use the one server to execute the polling?
Thank you for your help!

Answer 1

aren't the default cluster aware settings enough for this ?
http://docs.oracle.com/cd/E15523_01/integration.1111/e10231/adptr_db.htm
Scalability
you could enable a few in the adapter wizards