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文件名称:Concurrency in Main-Memory Database Systems
文件大小:1.65MB
文件格式:PDF
更新时间:2021-08-24 17:37:29
c++ database
availability of powerful servers with terabytes of main-memory has sparked a renewed
interest in main-memory database systems. Many early proposals focus on a
single workload type, either short transactions or long-running, read-only analytical
queries. In this thesis, we focus on allowing a broad range of workloads to be executed
concurrently on the same state of the data. While concurrency control is generally wellresearched,
we determine the merit of traditional solutions in a main-memory context
and suggest solutions which are ideally suited to the changed environment. In the first
part of this thesis, the optimal mechanism for creating snapshot in main-memory database
systems is determined which can then be used to execute transactions and analytic
queries by running queries on a fresh, transaction-consistent snapshot. Second, we introduce
tentative execution, a mechanism which allows long-running transactions to be
efficiently executed side by side with short transactions and read-only analytical queries.
Third, we describe how low-footprint main-memory database systems allow for low
overhead multi-tenancy while leveraging existing operating system mechanisms to enforce
service level agreements.