Markus Jelsma created NUTCH-2455:
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Summary: Speed up the merging of HostDb entries for variable fetch
delay
Key: NUTCH-2455
URL: https://issues.apache.org/jira/browse/NUTCH-2455
Project: Nutch
Issue Type: Improvement
Components: generator
Affects Versions: 1.13
Reporter: Markus Jelsma
??The correct solution would be to use <host,score> pairs as keys in the
Selector job, with a partitioner and secondary sorting so that all keys with
same host end up in the same call of the reducer. If values can also hold a
HostDb entry and the sort comparator guarantees that the HostDb entry (entries
if partitioned by domain or IP) comes in front of all CrawlDb entries. But that
would be a substantial improvement...??
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