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From Jonathan Ellis <>
Subject Re: Secondary indexing and 0.6/0.7 integration with Datanucleus
Date Wed, 16 Jun 2010 01:02:25 GMT
What issue were you trying to link? :)

On Tue, Jun 15, 2010 at 6:56 PM, Todd Nine <> wrote:
> Hi all,
>  I'm implementing a Datanucleus plugin for Cassandra.  I'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.
> 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.  Eventually at the end of all the
> intersections, I will have a list of keys I will then load.  This
> 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.    I've read over this
> issue.
> And it seems to solve a lot of my woes.  Is it possible/recommended to
> patch the current code base of 0.6.2 to perform this functionality?
> Thanks,
> Todd

Jonathan Ellis
Project Chair, Apache Cassandra
co-founder of Riptano, the source for professional Cassandra support

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