Transparent Fault Tolerance Solution at Socket Level Based on RADIC

We present a transparent middleware for fault tolerance based on RADIC, Redundant Array of Distributed Independent Controllers, a transparent and scalable fault tolerant architecture for parallel applications. It is designed at socket level and makes a secure tunnel connection able to keep the tcp sessions established by the application in spite of node failures. It is located at user level and is independent of the message-passing communication library being used. The protection gets through uncoordinated checkpoints and log message and the recovery are done in a automatic way so in case of node failures there is no need of intervention of the administrator. We have tested our fault tolerance system by executing a master-worker (M/W) and SPMD applications that follow different communication patterns.