rrdb | A simple Ruby wrapper for RRDtool backed databases | Application Framework library
kandi X-RAY | rrdb Summary
kandi X-RAY | rrdb Summary
RRDB is a simple wrapper around RRDtool for managing round robin database files. Methods are provided to create new databases, update them with new data, and fetch archives back out.
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QUESTION
How does rrdtool RRDB associate/bind an RRA to a DS? An XML dump does not seem to reveal where this binding info is kept. Neither does rrdinfo. But this info must be in there, because multiple RRAs can be associated with a single DS. Perhaps Am I missing something?
...ANSWER
Answered 2019-Jun-04 at 01:52Every DS is in every RRA. You do not need to bind a specific DS to specific RRAs as the vector created from the set of DS is common to all.
The difference between RRAs is not that they have a different DS vector, but that they have different lengths and granularities, and different roll-up functions. This enables the RRA to pre-calculate summary data at storage time, so that at graph time, most of the work is already done, speeding up the process.
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Install rrdb
On a UNIX-like operating system, using your system’s package manager is easiest. However, the packaged Ruby version may not be the newest one. There is also an installer for Windows. Managers help you to switch between multiple Ruby versions on your system. Installers can be used to install a specific or multiple Ruby versions. Please refer ruby-lang.org for more information.
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