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Cooperative Scans: Dynamic Bandwidth Sharing in a DBMS

Cooperative Scans: Dynamic Bandwidth Sharing in a DBMS

陈傲天
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We first present results on top of an NSM/PAX storage layout, showing that it achieves significant performance improvements over traditional policies in terms of both the number of I/Os and overall execution time, as well as latency of individual queries. We provide benchmarks with varying system parameters, data sizes and query loads to confirm the improvement occurs in a wide range of scenarios. Then we extend our proposal to a more complicated DSM scenario, discussing numerous problems related to the two-dimensional nature of disk scheduling in column stores.
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