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Date: Fri, 17 Sep 2010 16:41:51 -0400 (EDT)
From: "John Beck (JIRA)" <jira@apache.org>
To: dev@lucene.apache.org
Subject: [jira] Commented: (SOLR-1316) Create autosuggest component
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    [ https://issues.apache.org/jira/browse/SOLR-1316?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12910777#action_12910777 ] 

John Beck commented on SOLR-1316:
---------------------------------

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Hey guys, really nice work on this, it is extremely fast! In production right now we're seeing 200-700ms latency, and with this I typically get between 1ms and 10ms. 

I did find one issue though. I'm going to use this with a dictionary of 150k medical terms, and it's works, except for when my query happens to be a popular starting word. 

If I use this as a dictionary, 
{noformat} 
Hepatitis B Viruses, Duck 
Hepatitis B e Antigens 
Hepatitis B virus 
Hepatitis B, Chronic 
Hepatitis Be Antigens 
Hepatitis C 
Hepatitis C Antibodies 
Hepatitis C Antigen 
{noformat} 

And then search for Hepatitis C, 
{noformat} 
curl "http://localhost:8982/solr/suggest/?spellcheck=true&spellcheck.dictionary=suggest&spellcheck.extendedResults=true&spellcheck.count=5&q=Hepatitis%20C" 
<response> 
<lst name="responseHeader"><int name="status">0</int><int name="QTime">1</int></lst><str name="command">build</str><lst name="spellcheck"><lst name="suggestions"><lst name="Hepatitis"><int name="numFound">5</int><int name="startOffset">0</int><int name="endOffset">9</int><arr name="suggestion"><str>hepatitis b e antigens</str><str>hepatitis b virus</str><str>hepatitis b viruses, duck</str><str>hepatitis b, chronic</str><str>hepatitis be antigens</str></arr></lst></lst></lst> 
</response> 
{noformat} 

You can see it never makes it to Hepatitis C since it's #6 in that dictionary, and I'm limiting the results to 5. 

When I bump spellcheck.count=6, then I get the very first Hepatitis C result but not the rest. 

So there are about 2500 terms that start with "Receptor" and I don't want to have to bump it to 3000 results. Is there anything else that can be done?

> Create autosuggest component
> ----------------------------
>
>                 Key: SOLR-1316
>                 URL: https://issues.apache.org/jira/browse/SOLR-1316
>             Project: Solr
>          Issue Type: New Feature
>          Components: search
>    Affects Versions: 1.4
>            Reporter: Jason Rutherglen
>            Assignee: Andrzej Bialecki 
>            Priority: Minor
>             Fix For: Next
>
>         Attachments: SOLR-1316.patch, SOLR-1316.patch, SOLR-1316.patch, SOLR-1316.patch, SOLR-1316.patch, SOLR-1316.patch, SOLR-1316.patch, SOLR-1316.patch, SOLR-1316.patch, SOLR-1316.patch, SOLR-1316.patch, SOLR-1316_3x-2.patch, SOLR-1316_3x.patch, suggest.patch, suggest.patch, suggest.patch, TST.zip
>
>   Original Estimate: 96h
>  Remaining Estimate: 96h
>
> Autosuggest is a common search function that can be integrated
> into Solr as a SearchComponent. Our first implementation will
> use the TernaryTree found in Lucene contrib. 
> * Enable creation of the dictionary from the index or via Solr's
> RPC mechanism
> * What types of parameters and settings are desirable?
> * Hopefully in the future we can include user click through
> rates to boost those terms/phrases higher

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