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Re: [Question #207179]: Generating graph even without all target available

 

Question #207179 on Graphite changed:
https://answers.launchpad.net/graphite/+question/207179

    Status: Open => Answered

Jeff Blaine proposed the following answer:

>   I have a script that parse http logs, summarize/aggregate the data and send to carbon.
>
>   That scripts send information like number of requests per status code (200, 301, 302, 404, 503), per method (POST, GET, HEAD, etc) and I created graphics that show percentage of each kind of request and error code to follow the numbers.
>
>   Everything works great until I face with a situation where in a certain period of time there isn't any request with a specific status code so there is no data in the whisper database, when this happens my existent graphs are not displayed anymore and the graphite-web display the error "reduce() of empty sequence with no initial value".
>
>   Is there any way to make graphite interpret "no data" as 0 ? Or do I need to change my script to send zero value when there isn´t data in that period ?

http://graphite.readthedocs.org/en/0.9.10/render_api.html#drawnullaszero

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