Currently not. But with coming 0.8, it will. See https://issues.apache.org/jira/browse/PIG-1518 for detaqils.
From: jiang licht
Sent: Tuesday, August 24, 2010 4:44 PM
Subject: Does pig combine small files into one mapper?
In case of many small files that are smaller than a block size, will pig combine them into one map?