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Ensuring the success of big graph processing for the next decade and beyond.

Abstract-The commoditization of big data analytics, that is, the deployment, tuning, and future development of big data processing platforms such as MapReduce, relies on a thorough understanding of relevant use cases and workloads. In this work we propose BTWorld, a use case for time-based big data analytics that is representative for processing data collected periodically from a global-scale distributed system. BTWorld enables a datadriven approach to understanding the evolution of BitTorrent, a global file-sharing network that has over 100 million users and accounts for a third of today's upstream traffic. We describe for this use case the analyst questions and the structure of a multi-terabyte data set. We design a MapReduce-based logical workflow, which includes three levels of data dependencyinter-query, inter-job, and intra-job-and a query diversity that make the BTWorld use case challenging for today's big data processing tools; the workflow can be instantiated in various ways in the MapReduce stack. Last, we instantiate this complex workflow using Pig-Hadoop-HDFS and evaluate the use case empirically. Our MapReduce use case has challenging features: small (kilobytes) to large (250 MB) data sizes per observed item, excellent (10 −6 ) and very poor (10 2 ) selectivity, and short (seconds) to long (hours) job duration.

Abstract-In this paper we present the scaling of BTWorld, our MapReduce-based approach to observing and analyzing the global BitTorrent network which we have been monitoring for the past 4 years. BTWorld currently provides a comprehensive and complex set of queries implemented in Pig Latin, with data dependencies between them, which translate to several MapReduce jobs that have a heavy-tailed distribution with respect to both execution time and input size characteristics. Processing BitTorrent data in excess of 1 TB with our BTWorld workflow required an in-depth analysis of the entire software stack and the design of a complete optimization cycle. We analyze our system from both theoretical and experimental perspectives and we show how we attained a 15 times larger scale of data processing than our previous results.

In this paper we introduce LDBC Graphalytics, a new industrial-grade benchmark for graph analysis platforms. It consists of six deterministic algorithms, standard datasets, synthetic dataset generators, and reference output, that enable the objective comparison of graph analysis platforms. Its test harness produces deep metrics that quantify multiple kinds of system scalability, such as horizontal/vertical and weak/strong, and of robustness, such as failures and performance variability. The benchmark comes with open-source software for generating data and monitoring performance. We describe and analyze six implementations of the benchmark (three from the community, three from the industry), providing insights into the strengths and weaknesses of the platforms. Key to our contribution, vendors perform the tuning and benchmarking of their platforms.