spectroscope | flow comparison , a novel technique

spectroscope is a Perl library. spectroscope has no bugs, it has no vulnerabilities and it has low support. However spectroscope has a Non-SPDX License. You can download it from GitHub.

Please see the NSDI 2011 paper "Diagnosing performance changes by comparing request flows" for more information. Overview of source code. In the NSDI'11 paper, categories are groups of requests with the same structure or topology. In the Spectroscope source code, these are more generally called clusters. This is because the source code allows on to insert arbritrary clustering algorithms (cluster by structure is one such example). Similarly, in the NSDI'11 paper, categories that requests that have changed in structure during the problem period are called precursors. In this code, they may be called originators. The snapshot0 and snapshot1 files must contain request-flow graphs in DOT format. Each graph must be preceeded with a header that specifies an ID for the graph and its response time . I currently don’t remember what the RT parameter in the header specifies. Here is an example graph from a snapshot file. The label indicates the node name. Edges must contain a label with a "R: <> us" value, indicating the latency of that edge in the request-flow graph.