Abstract
Database systems with hybrid data management support, referred to as HTAP or HOAP architectures, are gaining popularity. These first appeared in the relational world, and the CH-benCHmark (CH) was proposed in 2011 to evaluate such relational systems. Today, one finds NoSQL database systems gaining adoption for new applications. In this paper we present CH2, a new benchmark – created with CH as its starting point – aimed at evaluating hybrid data platforms in the document data management world. Like CH, CH2 borrows from and extends both TPC-C and TPC-H. Differences from CH include a document-oriented schema, a data generation scheme that creates a TPC-H-like history, and a “do over” of the CH queries that is more in line with TPC-H. This paper details shortcomings that we uncovered in CH, the design of CH2, and preliminary results from running CH2 against Couchbase Server 7.0 (whose Query and Analytics services provide HOAP support for NoSQL data). The results provide insight into the performance isolation and horizontal scalability properties of Couchbase Server 7.0 as well as demonstrating the efficacy of CH2 for evaluating such platforms.
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Notes
- 1.
We prefer the term HOAP over HTAP in the context of NoSQL, as it seems less tied to strict ACID transactions and columnar, main-memory technology presumptions.
- 2.
N1QL is short for Non-1NF Query Language.
- 3.
The software artifacts associated with this paper’s benchmark can be found at https://github.com/couchbaselabs/ch2.
- 4.
The reason why we see some NewOrder throughput impact for the smaller 8Q configurations, but apparently without a corresponding NewOrder response time impact, is currently a bit of a performance mystery that running CH2 has revealed. We have several theories and we are currently investigating this behavior in order to further enhance Couchbase Server’s performance isolation and scaling characteristics.
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Acknowledgments
The authors wish to thank the Couchbase Query Service team, especially Sitaram Vemulapalli and Kamini Jagtiani, for assisting us with the new 7.0 N1QL transaction support, and Michael Blow and Ian Maxon from the Couchbase Analytics Service team, for invaluable assistance in setting up the AWS clusters used for the experiments.
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Carey, M., Lychagin, D., Muralikrishna, M., Sarathy, V., Westmann, T. (2022). CH2: A Hybrid Operational/Analytical Processing Benchmark for NoSQL. In: Nambiar, R., Poess, M. (eds) Performance Evaluation and Benchmarking. TPCTC 2021. Lecture Notes in Computer Science(), vol 13169. Springer, Cham. https://doi.org/10.1007/978-3-030-94437-7_5
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