Towards Refactoring DMARF and GIPSY OSS

ion thereby addressing the problem of complexity. These aspects are realized by defining ASSL in multiple tiers, which are the AS tier, the ASIP tier and the AE tier.[1] In the process of making DMARF autonomous with ASSL, for each distributed node a single AE that introduces an autonomic behavior at that node is specified. The novelty in this approach is to safeguard the pipeline which is not possible with common distributed systems. Self-healing in a DMARFbased system refers to the ability to recover with replication such that one route of the pipeline is available. Two type of replication is possible. One is the replication of a service which is increasing the number of nodes per stage and the other is the replication within the node itself. When one of the stages in the DMARF’s pipeline goes offline, the pipeline stalls and to recover it, the following options are considered:  The use of a replacement node  Recovery of the failed node and  Re-routing the pipeline through a different node with the same service functionality until the failed one