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From Jan Lehnardt <>
Subject Re: Using couchdb for analytics
Date Thu, 02 Jun 2011 13:41:17 GMT

On 2 Jun 2011, at 11:46, Gabor Ratky wrote:

> Btw, CouchDB users, is there any way to perform bulk updates using update handlers, similar
to _bulk_docs?

Nope. No reason there can't, it's just not wired up in the internals.
A patch should be straightforward, if anyone is interested :)


> Gabor
> [1]
> On Thursday, June 2, 2011 at 11:34 AM, wrote:
>> Hi everyone,
>> I came across couchdb a couple of weeks back & got really excited by
>> the fundamental change it brings by simply taking the app-server out
>> of the picture.
>> Must say, kudos to the dev team!
>> I am planning to write a quick analytics solution for my website -
>> something on the lines of Google analytics - which will measure
>> certain properties of the visitors hitting our site.
>> Since this is my first attempt at a JSON style document store, I
>> thought I'll share the architecture & see if I can make it better (or
>> correct my mistakes before I do them) :-)
>> - For each unique visitor, create a document with his session_id as the
>> - For each property i need to track about this visitor, I create a
>> key-value pair in the doc created for this visitor
>> - If visitor is a returning user, use the session_id to re-open his
>> doc & keep on modifying the properties
>> - At end of each calculation time period (say 1 hour or 24 hours), I
>> run a cron job which fires the map-reduce jobs by requesting the views
>> over curl/http.
>> A couple of questions based on above architecture...
>> We see concurrent traffic ranging from 2k users to 5k users.
>> - Would a couchdb instance running on a good machine (say High CPU
>> EC2, medium instance) work well with simultaneous writes happening...
>> (visitors browsing, properties changing or getting created)
>> - With a couple of million documents, would I be able to process my
>> views without causing any significant impact to write performance?
>> I think my questions might be biased by the fact that I come from a
>> MySQL/Rails background... :-)
>> Let me know how you guys think about this.
>> Thanks in advance,
>> --
>> Mayank

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