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From Daniel Doubleday <>
Subject Re: Second Cassandra users survey
Date Mon, 07 Nov 2011 12:54:44 GMT
Allow for deterministic / manual sharding of rows.

Right now it seems that there is no way to force rows with different row keys will be stored
on the same nodes in the ring.
This is our number one reason why we get data inconsistencies when nodes fail.

Sometimes a logical transaction requires writing rows with different row keys. If we could
use something like this:

prefix.uniquekey and let the partitioner use only the prefix the probability that only part
of the transaction would be written could be reduced considerably.

On Nov 1, 2011, at 11:59 PM, Jonathan Ellis wrote:

> Hi all,
> Two years ago I asked for Cassandra use cases and feature requests.
> [1]  The results [2] have been extremely useful in setting and
> prioritizing goals for Cassandra development.  But with the release of
> 1.0 we've accomplished basically everything from our original wish
> list. [3]
> I'd love to hear from modern Cassandra users again, especially if
> you're usually a quiet lurker.  What does Cassandra do well?  What are
> your pain points?  What's your feature wish list?
> As before, if you're in stealth mode or don't want to say anything in
> public, feel free to reply to me privately and I will keep it off the
> record.
> [1]
> [2]
> [3]
> -- 
> Jonathan Ellis
> Project Chair, Apache Cassandra
> co-founder of DataStax, the source for professional Cassandra support

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