Check this out: http://www.anuff.com/2011/02/indexing-in-cassandra.html#more

Or just google for wide row indexes.
On May 28, 2012, at 11:22 AM, Prakrati Agrawal wrote:

Please could you tell me how to tweak my data model to rely on 2nd index ?
Thank you
 
 
Prakrati Agrawal | Developer - Big Data(I&D)| 9731648376 | www.mu-sigma.com
 
From: Pierre Chalamet [mailto:pierre@chalamet.net] 
Sent: Monday, May 28, 2012 3:31 PM
To: user@cassandra.apache.org
Subject: Re: Doubt in Row key range scan
 
Hi,

It's normal.

Keys to replicas are determined with a hash (md5) when using the random partitionner (which you are using I guess).

You probably want to switch to the order preserving partionner or tweak your data model in order to rely on 2nd index for such filtering.
- Pierre

From: Prakrati Agrawal <Prakrati.Agrawal@mu-sigma.com>
Date: Mon, 28 May 2012 04:39:46 -0500
To: user@cassandra.apache.org<user@cassandra.apache.org>
Subject: Doubt in Row key range scan
 
Dear all
 
I have stored my data into Cassandra database in the format “tickerID_date”. Now when I specify the row key range like 1_2012/05/24(start) to 1_2012/05/27(end) it says that the end key md5 value is lesser than start key md5 value. So I changed my start key to  1_2012/05/27 and end key to 1_2012/05/24, then I got all the keys even which are not in my range like 67_2012/05/23 and 54_2012/05/28. I am  using Thrift API.
Please help me as I want only the columns of 1_2012/05/24, 1_2012/05/25 , 1_2012/05/26 and 1_2012/05/27.
 
Prakrati Agrawal | Developer - Big Data(I&D)| 9731648376 | www.mu-sigma.com
 
 

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