修改規則
<table name="user" dataNode="dn101,dn102" rule="mod-long" />
修改rule.xml
修改分片依賴的columns
<tableRule name="mod-long">
<rule>
<columns>user_id</columns>
<algorithm>mod-long</algorithm>
</rule>
</tableRule>
修改數據節點
<function name="mod-long" class="io.mycat.route.function.PartitionByMod">
<!-- how many data nodes -->
<property name="count">2</property>
</function>
適合2的n的服務器,如果是兩臺,擴容的話是4 然後8