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From Santal Li <>
Subject Re: Cassandra users survey
Date Sat, 21 Nov 2009 09:23:30 GMT
In Webex, we are using Cassandra for store User Feed & User Activity data,
it was nearly real time, to support web user interactive, current was in
early testing. We evaluated Voldemort, MemcacheDB, Dynomite.

I most want :
1. support build second index on values or columns.
2. support some kind of optimistic lock, base on row or columnfamily.
3. support increment/decrement.

2009/11/21 Jonathan Ellis <>

> Hi all,
> I'd love to get a better feel for who is using Cassandra and what kind
> of applications it is seeing.  If you are using Cassandra, could you
> share what you're using it for and what stage you are at with it
> (evaluation / testing / production)? Also, what alternatives you
> evaluated/are evaluating would be useful.  Finally, feel free to throw
> in "I'd love to use Cassandra if only it did X" wishes. :)
> I can start: Rackspace is using Cassandra for stats collection
> (testing, almost production) and as a backend for the Mail & Apps
> division (early testing).  We evaluated HBase, Hypertable, dynomite,
> and Voldemort as well.
> Thanks,
> -Jonathan
> (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.)

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