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From Jonathan Ellis <>
Subject Re: Reading all rows in a column family in parallel
Date Thu, 08 Jul 2010 20:36:07 GMT
There have been a number of bug fixes to this since 0.6.0 -- as Thomas
said, it works in 0.6.3.  (Although there is one related bug scheduled
to be fixed in 0.6.4,

On Thu, Jul 8, 2010 at 2:06 PM, Brent N. Chun <> wrote:
> Hi Jonathan,
> The code snippet below was from the repository. I mentioned 0.6.0
> specifically just to confirm that reading a CF using token-based range
> queries with the RandomPartitioner should (or shouldn't) also work in that
> version. I've seen discussions about whether range queries are now supported
> with the RandomPartitioner for example. Moreover, those discussions mostly
> seem to involve key-based range queries, though, not token-based range
> queries like CFRR uses. If you're saying that this functionality essentially
> works for everyone but me in 0.6.0, then that implies I have a bug in my
> code which would be great news for me. What I'm essentially seeing is either
> all rows, all rows + duplicate rows, or missing rows even when using a
> single node. Which of these I get is entirely deterministic. If I delete all
> the data and insert the same rows, the ranges returned by describe_ring
> changes but the end result of reading the CF is then one of those three
> cases.
> Thanks,
> bnc
> Jonathan Ellis wrote:
>> "CFRR does this.  Is this possible?"
>> I guess I don't understand the question. :)

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

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