Automated Network Diagnosis Prevent Problems

Abstract

Software that performs well in one environment may be unusably slow in another, and determining the root cause is time-consuming and error-prone, even in environments in which all the data may be available. End users have an even more difficult time trying to diagnose system performance, since both software and network problems. Diagnosing performance degradation in distributed systems is a complex and difficult task.The source of performance stalls in a distributed system can be automatically detected and diagnosed with very limited information the dependency graph of data flows through the system, and a few counters common to almost all data processing systems. An automated approach for diagnosing performance stalls in networked systems. Flow Diagnoser requires as little as two bits of information per module to make a diagnosis: one to indicate whether the module is actively processing data, and one to indicate whether the module is waiting on its dependents. Flow Diagnoser is implemented in two distinct environments: an individual host�s networking stack, and a distributed streams processing system.