Putting Lipstick on Pig: Enabling Database-style Workflow Provenance

Details Putting Lipstick on Pig: Enabling Database-style Workflow Provenance Putting Lipstick on Pig: Enabling Database-style Workflow Provenance

2011-12-31

arxiv.org/abs/1201.0231v1

Proceedings of the VLDB Endowment (PVLDB), Vol. 5, No. 4, pp. 346-357 (2011)

Computer Science

Databases

VLDB2012

Scientific paper

Workflow provenance typically assumes that each module is a "black-box", so that each output depends on all inputs (coarse-grained dependencies). Furthermore, it does not model the internal state of a module, which can change between repeated executions. In practice, however, an output may depend on only a small subset of the inputs (fine-grained dependencies) as well as on the internal state of the module. We present a novel provenance framework that marries database-style and workflow-style provenance, by using Pig Latin to expose the functionality of modules, thus capturing internal state and fine-grained dependencies. A critical ingredient in our solution is the use of a novel form of provenance graph that models module invocations and yields a compact representation of fine-grained workflow provenance. It also enables a number of novel graph transformation operations, allowing to choose the desired level of granularity in provenance querying (ZoomIn and ZoomOut), and supporting "what-if" workflow analytic queries. We implemented our approach in the Lipstick system and developed a benchmark in support of a systematic performance evaluation. Our results demonstrate the feasibility of tracking and querying fine-grained workflow provenance.

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