[rrd-users] Using RRD to calculate recently popular users
buzypi at gmail.com
Tue Dec 9 11:53:47 CET 2008
Thought as much, but wanted someone to give me a convincing reply so that we
can make a better decision.
Thanks for the quick reply!
On Tue, Dec 9, 2008 at 4:16 PM, Simon Hobson <linux at thehobsons.co.uk> wrote:
> Gautham Pai wrote:
> >We are trying to see if RRDTool is a good fit to build a popularity
> >service for a social network.
> No, I don't think it will help you much, if at all.
> >The requirements are:
> >A unique score is given to every user based on various factors. The
> >number of such users could run into millions. We then feed this
> >score along with the userids to a datastore. We should then be able
> >to query the store for answers to questions like:
> >* Who are the top 5 active users in the network?
> RRD won't tell you that, you'd have to write a script to extract the
> data and sort it.
> >* Who are the top 5 active users in the last one month and how has
> >their activity changed in the last week?
> Ditto, RRD won't find the top users for you, but once you've found
> them then it could tell your what their activity has been.
> >I read that RRDTool allows only numeric data to be captured. But we
> >need some book-keeping data too that needs to be stored and
> >retrieved later.
> Correct, only numeric data is held, and the data elements are static
> - eg you cannot store (user, date/time, activity) tuples. You would
> have to either store a separate database for each user (that's a LOT
> of files), or stuff LOTS of users into one file (really hard to
> manage), or keep a number of files each of which stores data for a
> number of users (also very hard to manage).
> >Is it possible to build such a service using RRDTool?
> To be honest, I think the work involved in making it fit your needs
> would be more than using a common relational database which would
> probably be able to return most of the information you want using
> it's standard query facilities.
> Simon Hobson
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