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From Jonathan Ellis <jbel...@gmail.com>
Subject Re: Secondary Index Storage
Date Fri, 23 Aug 2013 04:22:05 GMT
Sorry, Aleksey pointed out that the index directory isn't separate from the
"parent" table.  Probably so that we can snapshot them both together, which
is why the separate config in .yaml doesn't make sense either.


On Thu, Aug 22, 2013 at 11:07 PM, Jonathan Ellis <jbellis@gmail.com> wrote:

> You can already symlink the index directory anywhere you like.  I'm not
> convinced that special-casing indexes is a good approach in general vs
> looking at performance of all tables.
>
>
> On Thu, Aug 22, 2013 at 8:16 PM, Nipuni Piyabasi Perera <
> nipuni880917@gmail.com> wrote:
>
>> Hi,
>>
>> I need to do a secondary index access improvement with a little
>> modification to Cassandra. I could see in [1], that the performance of
>> secondary index querying can be increased via splitting the column family
>> data and secondary index data.
>> Currently Cassandra saves keyspace data and secondary indices data in
>> "var/lib/cassandra/data/".
>> According to my understanding the data saves in the
>> "data_file_directories"
>> location of conf/cassandra.yaml file. If I can enter new variable into
>> "cassandra.yaml" file and address it in the place where Cassandra stores
>> secondary indexes, this can be fixed.
>>
>> Can anyone give some guidance regarding this improvement.
>>
>> [1] https://issues.apache.org/jira/browse/CASSANDRA-5502
>>
>> Thanks,
>> Nipuni
>>
>> --
>> Nipuni Piyabasi Perera
>> Undergraduate
>> Department of Computer Science And Engineering
>> University of Moratuwa
>> Sri Lanka
>>
>
>
>
> --
> Jonathan Ellis
> Project Chair, Apache Cassandra
> co-founder, http://www.datastax.com
> @spyced
>



-- 
Jonathan Ellis
Project Chair, Apache Cassandra
co-founder, http://www.datastax.com
@spyced

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