Hello Friends,
I want to know by any way we can use solr data import handler with cassandra.
If I can get any reference site or example would be good help.
Thanks
I'd have a look at datastax's page on cassandra integration with solr. Also look at this Github repository, its a library for cassandra and solr.
That gitHub library is old , only Datastax Enterprise uses the integration of Cassandra with Solr, but its not free.
You can see Stargate-core soluton for cassandra but it uses lucene
Another one is Stratio Cassandra again it used Lucene
Hope this helps
Regards
Asit
Related
I saw there was a article in the Apache wiki on OpenNLP for Solr.
Is it valid for current solr version 5.3.1?
No, if you have a look at LUCENE-2899, you'll see that the code discussed was never added to trunk. You'll have to download/patch/update the code yourself if you're going to have it native to Solr.
It's probably a better idea to do all the NLP stuff outside of Solr, then index the result in a form suited for the task you're trying to solve.
Yes. It's better to keep it outside.
Here is a small project I tried.
https://github.com/john77eipe/DeepQA
ElasticSearch has percolator for prospective search. Does SOLR have a similar feature where you define your query upfront? If not, is there an effective way of implementing this myself on top of the existing SOLR features?
besides what BunkerMentality said, it is not hard to build your own percolator, what you need:
Are the queries you want to run easy to model on Lucene only syntax? if so you are good, if not, you need to convert them to Lucene only. Built them, and keep them in memory as Lucene queries
When a doc arrives:
build a MemoryIndex containing only that single doc
run all your queries on the index
I have done this for a system ingesting millions docs a day and it worked fine.
It's listed as an open new feature, SOLR-4587, on Solr JIRA but it doesn't seem like any work has started on it yet.
There is a link in the comments there to a separate project called Luwak that seems to implement some features similar to percolator.
If it is still relevant, you can use this
It's SOLR Update Processor that based on Luwak
I have found the interesting article on Solr Facet Functions available in heliosearch.
I am just wondering if the same is available in native solr?
That kind of functionality will come with SOLR 5.1. Yonik, the developer of Heliosearch, joined a big SOLR company. Development on Heliosearch will not continue, but Yonik is porting the changes to SOLR. See the following thread for details:
https://groups.google.com/forum/#!topic/heliosearch/ji466TddEDY
I don't think here are facet/aggregate functions like that. The closest thing I've found is the stats component:
https://cwiki.apache.org/confluence/display/solr/The+Stats+Component
https://cwiki.apache.org/confluence/display/solr/Faceting#Faceting-CombiningStatsComponentWithPivots
How to integrate Kibana with Apache solr instead of using elastic search.
If it cannot be done.
What are the alternatives to Kibana for Solr
At LucidWorks, we have ported Kibana to work with Solr and released it as open source.
If you want a bundled package, you can download that at http://www.lucidworks.com/lucidworks-silk/.
Our port for Kibana for Solr is bundled with Solr 4.7.0 and can be used as a query engine to build dashboards from indexes within the bundled Solr instance and/or located on other Solr instances.
The source code is available at https://github.com/LucidWorks/banana.
We have also included Solr Output Writer for LogStash with that bundle; however, you can use any ETL and indexing mechanism to get time series data into Solr. Links to this github repository are available on the LucidWorks link above.
HUE is an alternative search UI for Solr, while it is not good as Kibana for search at the moment.
You can use SiLK for sure but you are better off using the fully integrated dashboards module that comes with Lucidworks Fusion. Fusion will save you a ton of time and make it easier to focus on the search stuff that matters - like building a recommender engine, creating data-driven user experience, driving data enrichment with entity recognition and integrating with Big Data software like Hadoop.
I am tring to implement a website search engine with java as an applet,I have used nutch as web crawler and cassandra as my database,I have to use a nosql database(because my teacher wants me to do),now my question is what should I do next to complete my search engine?
I have googled a lot,but all of the sites are mostly about nutch and solr,and they build search engines with integration of these two,cause solr itself is somehow a database,I don't know what should I do,do I have to use solr too to complete my search engine?is it wise to use two databases(solr and cassandra)?or I should do some thing else?
please remember I have to use cassandra.
and please first explain me if I have understood things in a wrong way and then give me a minus mark,:D
I will be really really thankfull for your help,I have got somehow confused.
by the way does solr counted as a nosql database?excuse me,I am new to them all.
Check out Solr's Data Import Handler and see if you feel it would work. It allows you to query your database and store the results with Solr to which then Solr can manipulate the reuslts. Nutch also has very good integration with Solr should you choose to use it.