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From Jonathan Ellis <jbel...@gmail.com>
Subject Re: [DISCUSSION] High-volume counters in Cassandra
Date Tue, 28 Sep 2010 20:38:12 GMT
On Tue, Sep 28, 2010 at 3:35 PM, Ryan King <ryan@twitter.com> wrote:
> On Tue, Sep 28, 2010 at 12:48 PM, Jonathan Ellis <jbellis@gmail.com> wrote:
>> On Tue, Sep 28, 2010 at 2:25 PM, Ryan King <ryan@twitter.com> wrote:
>>> Sorry, been catching up on this.
>>>
>>> From Twitter's perspective, 1546 is probably insufficient because it
>>> doesn't allow one to do time-series data without supercolumns (which
>>> might work ok, but require a good deal of work). Additionally, one of
>>> our deployed systems already does supercolumns of counters, which is
>>> not feasible in this design at all.
>>
>> True, although wouldn't rows-of-counters give you basically the same
>> thing if 1546 kept its counters as subcolumns of a supercolumn?
>
> That would solve the first part (single-dimension time-series), but we
> also do supercolumns of counters, which 1546 doesn't appear to be able
> to address.

Right, I'm saying that "rows of counters + get_range_slices" looks a
lot like "supercolumns of counters + get_slice" to me.

-- 
Jonathan Ellis
Project Chair, Apache Cassandra
co-founder of Riptano, the source for professional Cassandra support
http://riptano.com

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