My personal use cases which are primarily using the visualization tools would appreciate more dimensionality in daily and weekly views (which increases storage). I think you should definitely degrade the resolution, possibly more aggressively than you propose. RRDTool has been doing this for decades so people are used to it.

-Toby

On Fri, Jul 29, 2016 at 5:40 AM, Dan Andreescu <dandreescu@wikimedia.org> wrote:

Dear Pageview API consumers,

We would like to plan storage capacity for our pageview API cluster. Right now, with a reliable RAID setup, we can keep 18 months of data. If you'd like to query further back than that, you can download dump files (which we'll make easier to use with python utilities).

What do you think? Will you need more than 18 months of data? If so, we need to add more nodes when we get to that point, and that costs money, so we want to check if there is a real need for it.

Another option is to start degrading the resolution for older data (only keep weekly or monthly for data older than 1 year for example). If you need more than 18 months, we'd love to hear your use case and something in the form of:

need daily resolution for 1 year
need weekly resolution for 2 years
need monthly resolution for 3 years

Thank you!

Dan

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