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From Matthias Pfau <>
Subject Re: Second Cassandra users survey
Date Tue, 06 Dec 2011 11:43:42 GMT
It took some time to gather our requirements and to check what are our 
most important needs. However, here they are:

* Column position range queries: We would like to access columns not by 
their name, but by their position in the row.
Example: row("A":v1, "B":v2, "C":v3, "D":v4); ; ordered by UTF8TYPE
Example query: "Give all elements with position range 1..3" would return 
("B":v2, "C":v3, "D":v4)

* Arbitrary position range queries: We would like to access arbitrary 
colums by their position in the row:
Example query: "Give all elements with positions (0, 3, 1)" would return 
("B":v2, "D":v4, "A":v1)

* Security for client-server communication (thrift): A big benefit for 
all users of cassandra which deploy the cluster into untrusted 
environments (Amazon EC2 etc.) would be the possibility to secure the 
client-server communication with SSL. This has already been implemented 
in Thrift (see and 
must probably be added to CassandraDaemon.ThriftServer.

Kind regards
Arne and Matthias

On 11/01/2011 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]

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