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Feb 12, 2017 · Creating multiple crawlers for custom Index in sitecore February 12, 2017 February 12, 2017 Ankit Joshi When we discuss/talk about indexes to be used in sitecore solution, various indexing strategies, no# of indexes, application performance and etc, following are few things which we should review and discuss first: Crawl and index files, file folders or file servers How to index files like Word documents, PDF files and whole document folders to Apache Solr or Elastic Search? This connector and command line tools crawl and index directories and files from your filesystem and index it to Apache Solr or Elastic Search for full text search and text mining . crawler, for instance, can thus ensure that the search engine’s index contains a fairly current representation of each indexed web page. For such continuous crawling, a crawler should be able to crawl a page with a frequency that approximates the rate of change of that page. Extensible: Crawlers should be designed to be Solr Cloud Definition SolrCloud is a set of new features and functionality added in Solr 4.0 to enable a new way of creating durable, highly available Solr clusters with commodity hardware. While similar in many ways to master-slave, SolrCloud automates a lot of the manual labor required in master-slave through using ZooKeeper nodes to monitor the state of the cluster as well as additional ... To add some more clarity to this, the issue was that SitecoreItemCrawler was adding the item to the "list of already indexed items" before checking whether the item was relevant to the current crawler. When the second crawler got the item, it was already in the processed list so it was skipped. This post is a quick summary of the infrastructure, setup, and gotchas of using Nutch 2.3.1 to build a site search - essentially notes from this hack week project. If you are not familiar with Apache Nutch Crawler, please visit here. Nutch 2.x and Nutch 1.x are fairly different in terms of set up, execution, and architecture.