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From: Jonathan Ellis <jbellis@gmail.com>
Date: Tue, 15 Jun 2010 20:02:25 -0500
Message-ID: <AANLkTinLWGYHLKluiWaGOHxmGnF0PHgusvSBxeYw4qP0@mail.gmail.com>
Subject: Re: Secondary indexing and 0.6/0.7 integration with Datanucleus
To: dev@cassandra.apache.org, todd@spidertracks.co.nz
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What issue were you trying to link? :)

On Tue, Jun 15, 2010 at 6:56 PM, Todd Nine <todd@spidertracks.co.nz> wrote:
> Hi all,
> =A0I'm implementing a Datanucleus plugin for Cassandra. =A0I'm finished
> with the basic functionality, and everything seems to work pretty well.
> Now my issue is performing secondary indexing on fields within my data.
> I have outlined some of the issues I'm facing in this post.
>
> http://www.datanucleus.org/servlet/forum/viewthread_thread,6087_lastpage,=
yes#32610
>
> Essentially, for each operand the user specifies, I will need to make a
> trip to Cassandra, load the key columns, then perform an intersection
> with the result from my previous read. =A0Eventually at the end of all th=
e
> intersections, I will have a list of keys I will then load. =A0This
> obviously requires several trips to Cassandra, where from my
> understanding of secondary indexing, I would only need to make one trip
> for multiple operands over a column family. =A0 =A0I've read over this
> issue.
>
> http://issues.apache.org/jira/browse/CASSANDRA-32610
>
> And it seems to solve a lot of my woes. =A0Is it possible/recommended to
> patch the current code base of 0.6.2 to perform this functionality?
>
> Thanks,
> Todd
>
>


--=20
Jonathan Ellis
Project Chair, Apache Cassandra
co-founder of Riptano, the source for professional Cassandra support
http://riptano.com