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From Andres de la Peña <adelap...@stratio.com>
Subject Re: Lucene index plugin for Apache Cassandra
Date Fri, 12 Jun 2015 10:43:10 GMT
I really appreciate your interest

Well, the first recommendation is to not use it unless you need it, because
a properly Cassandra denormalized model is almost always preferable to
indexing. Lucene indexing is a good option when there is no viable
denormalization alternative. This is the case of range queries over
multiple dimensions, full-text search or maybe complex boolean predicates.
It's also appropriate for Spark/Hadoop jobs mapping a small fraction of the
total amount of rows in a certain table, if you can pay the cost of
indexing.

Lucene indexes run inside C*, so users should closely monitor the amount of
used memory. It's also a good idea to put the Lucene directory files in a
separate disk to those used by C* itself. Additionally, you should consider
that indexed tables write throughput will be appreciably reduced, maybe to
a few thousands rows per second.

It's really hard to estimate the amount of resources needed by the index
due to the great variety of indexing and querying ways that Lucene offers,
so the only thing we can suggest is to empirically find the optimal setup
for your use case.

2015-06-12 12:00 GMT+02:00 Carlos Rolo <rolo@pythian.com>:

> Seems like an interesting tool!
>
> What operational recommendations would you make to users of this tool
> (Extra hardware capacity, extra metrics to monitor, etc)?
>
> Regards,
>
> Carlos Juzarte Rolo
> Cassandra Consultant
>
> Pythian - Love your data
>
> rolo@pythian | Twitter: cjrolo | Linkedin: *linkedin.com/in/carlosjuzarterolo
> <http://linkedin.com/in/carlosjuzarterolo>*
> Mobile: +31 6 159 61 814 | Tel: +1 613 565 8696 x1649
> www.pythian.com
>
> On Fri, Jun 12, 2015 at 11:07 AM, Andres de la Peña <adelapena@stratio.com
> > wrote:
>
>> Unfortunately, we don't have published any benchmarks yet, but we have
>> plans to do it as soon as possible. However, you can expect a similar
>> behavior as those of Elasticsearch or Solr, with some overhead due to the
>> need for indexing both the Cassandra's row key and the partition's token.
>> You can also take a look at this presentation
>> <http://planetcassandra.org/video-presentations/vp/cassandra-summit-europe-2014/vd/stratio-advanced-search-and-top-k-queries-in-cassandra/>
>> to see how cluster distribution is done.
>>
>> 2015-06-12 0:45 GMT+02:00 Ben Bromhead <ben@instaclustr.com>:
>>
>>> Looks awesome, do you have any examples/benchmarks of using these
>>> indexes for various cluster sizes e.g. 20 nodes, 60 nodes, 100s+?
>>>
>>> On 10 June 2015 at 09:08, Andres de la Peña <adelapena@stratio.com>
>>> wrote:
>>>
>>>> Hi all,
>>>>
>>>> With the release of Cassandra 2.1.6, Stratio is glad to present its
>>>> open source Lucene-based implementation of C* secondary indexes
>>>> <https://github.com/Stratio/cassandra-lucene-index> as a plugin that
>>>> can be attached to Apache Cassandra. Before the above changes, Lucene index
>>>> was distributed inside a fork of Apache Cassandra, with all the
>>>> difficulties implied. As of now, the fork is discontinued and new users
>>>> should use the recently created plugin, which maintains all the features
of Stratio
>>>> Cassandra <https://github.com/Stratio/stratio-cassandra>.
>>>>
>>>>
>>>>
>>>> Stratio's Lucene index extends Cassandra’s functionality to provide
>>>> near real-time distributed search engine capabilities such as with
>>>> ElasticSearch or Solr, including full text search capabilities, free
>>>> multivariable search, relevance queries and field-based sorting. Each node
>>>> indexes its own data, so high availability and scalability is guaranteed.
>>>>
>>>>
>>>> We hope this will be useful to the Apache Cassandra community.
>>>>
>>>>
>>>> Regards,
>>>>
>>>> --
>>>>
>>>> Andrés de la Peña
>>>>
>>>>
>>>> <http://www.stratio.com/>
>>>> Avenida de Europa, 26. Ática 5. 3ª Planta
>>>> 28224 Pozuelo de Alarcón, Madrid
>>>> Tel: +34 91 352 59 42 // *@stratiobd <https://twitter.com/StratioBD>*
>>>>
>>>
>>>
>>>
>>> --
>>>
>>> Ben Bromhead
>>>
>>> Instaclustr | www.instaclustr.com | @instaclustr
>>> <http://twitter.com/instaclustr> | (650) 284 9692
>>>
>>
>>
>>
>> --
>>
>> Andrés de la Peña
>>
>>
>> <http://www.stratio.com/>
>> Avenida de Europa, 26. Ática 5. 3ª Planta
>> 28224 Pozuelo de Alarcón, Madrid
>> Tel: +34 91 352 59 42 // *@stratiobd <https://twitter.com/StratioBD>*
>>
>
>
> --
>
>
>
>


-- 

Andrés de la Peña


<http://www.stratio.com/>
Avenida de Europa, 26. Ática 5. 3ª Planta
28224 Pozuelo de Alarcón, Madrid
Tel: +34 91 352 59 42 // *@stratiobd <https://twitter.com/StratioBD>*

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