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From Ananth Gundabattula <>
Subject Re: Rhombus - A time-series object store for Cassandra
Date Sun, 14 Jul 2013 23:50:47 GMT
Thanks for the pointer Aaron.


On 15-Jul-2013, at 8:30 AM, "aaron morton" <<>>

For those following along at home, recently another project in this space was announced


Aaron Morton
Cassandra Consultant
New Zealand


On 13/07/2013, at 4:01 PM, Ananth Gundabattula <<>>

Hello Rob,

Thanks for the pointer. I have a couple of queries:

How does this project compare to the KairosDb project on github ( For one
I see that Rhombus supports multi column query which is cool whereas
kairos time series DB/OpenTSDB do not seem to have such a feature -
although we can use the tags to achieve something similar ? )

Are there any roll ups performed automatically by Rhombus ?

Can we control the TTL of the data being inserted ?

I am looking at the some of the time series based projects for production
use preferably running on top of cassandra and was wondering if Rhombus
can be seen as a pure time series optimized schema or something more than
that ?


On 7/12/13 7:15 AM, "Rob Righter" <<>>


Just wanted to share a project that we have been working on. It's a
time-series object store for Cassandra. We tried to generalize the
common use cases for storing time-series data in Cassandra and
automatically handle the denormalization, indexing, and wide row
sharding. It currently exists as a Java Library. We have it deployed
as a web service in a Dropwizard app server with a REST style
interface. The plan is to eventually release that Dropwizard app too.

The project and explanation is available on Github at:

I would love to hear feedback.

Many Thanks,

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