Nutch 是一个开源Java 实现的搜索引擎。它提供了我们运行自己的搜索引擎所需的全部工具。包括全文搜索和Web爬虫。
Nutch 致力于让每个人能很容易, 同时花费很少就可以配置世界一流的Web搜索引擎. 为了完成这一宏伟的目标, Nutch必须能够做到:
* 每个月取几十亿网页 * 为这些网页维护一个索引 * 对索引文件进行每秒上千次的搜索 * 提供高质量的搜索结果
近日，Apache Nutch 1.9 发布，主要改进包括：
Improvement[NUTCH-1502] - Test for CrawlDatum state transitions [NUTCH-1561] - improve usability of parse-metatags and index-metadata [NUTCH-1676] - Add rudimentary SSL support to protocol-http [NUTCH-1745] - Upgrade to ElasticSearch 1.1.0 [NUTCH-1747] - Use AtomicInteger as semaphore in Fetcher [NUTCH-1757] - ParserChecker to take custom metadata as input [NUTCH-1758] - IndexChecker to send document to IndexWriters [NUTCH-1772] - Injector does not need merging if no pre-existing crawldb [NUTCH-1782] - NodeWalker to return current node [NUTCH-1787] - update and complete API doc overview page [NUTCH-1794] - IndexingFilterChecker to optionally dumpText [NUTCH-1799] - ANT Eclipse task discovers all plugin jars automatically
New Feature[NUTCH-207] - Bandwidth target for fetcher rather than a thread count [NUTCH-1327] - QueryStringNormalizer [NUTCH-1590] - [SECURITY] Frame injection vulnerability in published Javadoc
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