Latency is defined as the time that elapses between a stimulus and the response to it. In the context of analytics this could be taken to mean the time taken between initiating a query and receiving an answer or, if you are querying data on a continuous basis, the time taken between a change in the data and that change being reflected in the result set.
In this paper we will first discuss some use cases. While by no means an exhaustive list this will give the reader some idea of the range of different applications in which low latency is required, as well as the extent of that latency. As we move forward we expect low latency requirements to become more and more prevalent.
We will conclude by discussing the sort of features to look for in a data warehouse that is required to support low latency analytics, and follow that with a discussion of how the Vertica Analytic Database meets those requirements.
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