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From Miguel Pereira <>
Subject Re: Cosmos - Accumulo-backed sorting, filtering and grouping of columnar data sets
Date Thu, 05 Sep 2013 14:49:24 GMT
+1 for making things simple :D

On Mon, Sep 2, 2013 at 10:30 PM, Josh Elser <> wrote:

> Since this is the community that's likely to be interested, I wanted to
> spread some word about a project I've been working on in my spare time:
> Cosmos.
> The point of Cosmos is to provide an efficient, easy-to-use interface
> around Accumulo for the general purpose of counting and filtering of a data
> set. At a glance, it accepts Multimaps of data, and provides mechanism to
> fetch records by column, fetch records by column with value filtering, and
> count unique values across records in a column (groupBy). It also contains
> a very simple internal timing/tracing API (much less granular than
> Accumulo's tracing library), and a (very) rough web interface for viewing
> said traces. Additionally, Cosmos contains a simple example of its API
> using a public dataset of ~350K records provided by the city of Chicago (
> https://data.cityofchicago.**org/ <>).
> Cosmos' design lends itself well to multiple users accessing the same
> Accumulo instance, deferring to Accumulo or ZooKeeper to do
> synchronization/persistence when necessary. It aims at abstracting some of
> the difficulty in using Accumulo away from the user to make the application
> developer's life a bit easier.
> And, as you'd expect, Apache licensed and compatible with Apache Accumulo
> 1.4.4 and 1.5.0.
> I'd love to hear what people think. Any feedback is welcome.
> - Josh

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