yacy_search_server

History

Michael Peter Christen da86f150ab - added a new Crawler Balancer: HostBalancer and HostQueues: This organizes all urls to be loaded in separate queues for each host. Each host separates the crawl depth into it's own queue. The primary rule for urls taken from any queue is, that the crawl depth is minimal. This produces a crawl depth which is identical to the clickdepth. Furthermorem the crawl is able to create a much better balancing over all hosts which is fair to all hosts that are in the queue. This process will create a very large number of files for wide crawls in the QUEUES folder: for each host a directory, for each crawl depth a file inside the directory. A crawl with maxdepth = 4 will be able to create 10.000s of files. To be able to use that many file readers, it was necessary to implement a new index data structure which opens the file only if an access is wanted (OnDemandOpenFileIndex). The usage of such on-demand file reader shall prevent that the number of file pointers is over the system limit, which is usually about 10.000 open files. Some parts of YaCy had to be adopted to handle the crawl depth number correctly. The logging and the IndexCreateQueues servlet had to be adopted to show the crawl queues differently, because the host name is attached to the port on the host to differentiate between http, https, and ftp services.		11 years ago
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Importer.java	added missing @Override annotation	11 years ago
MediawikiImporter.java	- added a new Crawler Balancer: HostBalancer and HostQueues:	11 years ago
OAIListFriendsLoader.java	- the webgraph shall store all links which appear on a web page and not	12 years ago
OAIPMHImporter.java	- the webgraph shall store all links which appear on a web page and not	12 years ago
OAIPMHLoader.java	- the webgraph shall store all links which appear on a web page and not	12 years ago
ResumptionToken.java	added missing @Override annotation	11 years ago