How does Toplink know which Pool to use ?

Question

We have two pools defined in sessions.xml as below
default has is-read-connection-pool false and one with true. We are not specifying to use read pool or default pool in our app anywhere, which we can while acquireClientSession("pool name"), but we are not. Does TL automatically decide to use which pool to use ?
          <connection-pool>
               <is-read-connection-pool>false</is-read-connection-pool>
               <name>default</name>
               <max-connections>10</max-connections>
               <min-connections>10</min-connections>
          </connection-pool>
          <connection-pool>
               <is-read-connection-pool>true</is-read-connection-pool>
               <name>Read Pool</name>
               <max-connections>15</max-connections>
               <min-connections>15</min-connections>
          </connection-pool>

Answer 1

When using TopLink's internal connection pooling:
READING: session.acquireClientSession() will acquire a read connection for the client session from the default read connection pool. Having multiple read connection pools and providing the pool name in the acquire is very uncommon.
WRITING: When a UnitOfWork requires a connection for writing it will acquire a connection from the write connection pool.
Doug