lalithsuresh/Scaling-HDFS-NameNode — pull request #1 by lalithsuresh (2011-12-06 20:06:40+00:00)
Title: Lalith stable rebase

The following commits implement the following:
1) Fixes the file-not-replicated-yet bug, related to BlockInfoTable ordering. A timestamp member was added to BlockInfo class, and to the corresponding entry in the ClusterJ interface class.
2) Fixes the triplets removal bug, related to DB queries being out of order.
3) Replaces the one-session-per-operation model with a one-session-per-namenode-thread model, implemented using session pools in the DBConnector.
4) Allows the DBConnector parameters to be specified via configuration file (hdfs-site.xml).