Nutch and SOLR - Updating DB and indexes

[Ajmal Rahman <aj...@tcs.com>]

Hi Team,

I have nutch and solr setup and it is integrated on my website and working good.

Now I need to update the search index since there are updates to the content of my website. I have a few queries regarding this as follows:

1. Do I need to delete the contents of the crawl folder (apache-nutch-1.10/crawl/) - that is segments, linkdb and crawldb? What would happen if I run the crawl without deleting it? Is there any significance in deleting it?

2. I believe only running the crawl script (bin/crawl ..) would be enough. In this context what is the significance deleting the existing indexes from the Solr Admin (by submitting in documents : <delete><query>*:*</query></delete>). Is it actually required?

3. Also I was told to do a Reload and Optimize from the Solr Admin page (Core Admin) before running the crawl job. Is it really required? What is the significance?

Regards,

Mohammed Ajmal Rahman
Tata Consultancy Services
Mailto: ajmal.rahman@tcs.com
Website: http://www.tcs.com
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