Time Series Data Collection & Analysis Cube is a system for collecting timestamped events and deriving metrics. By collecting events rather than metrics, Cube lets you compute aggregate statistics post hoc. It also enables richer analysis, such as quantiles and histograms of arbitrary event sets. Cube is built on MongoDB and available under the Apache License on GitHub. Collecting Data An event in
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(Edit 3/16/2012: I am surprised that this post is picked up by a lot of media outlets. Given the strong interest, I want to emphasize what is measured and what is derived. The # of server racks in EC2 is what I am directly observing. By assuming 64 physical servers in a rack, I can derive the rough server count. But remember this is an *assumption*. Check the comments below that some think that AW
There are two PowerDNS nameserver products: the Authoritative Server and the Recursor. While most other nameservers fully combine these functions, PowerDNS offers them separately, but can mix both authoritative and recursive usage seamlessly. The Authoritative Server will answer questions about domains it knows about, but will not go out on the net to resolve queries about other domains. When the
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