Sebastian Nagel created NUTCH-2950:
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Summary: UpdateHostDb: performance improvements
Key: NUTCH-2950
URL: https://issues.apache.org/jira/browse/NUTCH-2950
Project: Nutch
Issue Type: Improvement
Components: hostdb
Affects Versions: 1.18
Reporter: Sebastian Nagel
Assignee: Sebastian Nagel
Fix For: 1.19
This issue addresses a couple of performance improvements when creating the
HostDb:
- avoid needless conversions between hostname and URL
- improvements of HostDb serialization (write and read)
- parametrize logging and log less on level INFO
- do not create DNS resolver threads if DNS look-ups are not requested by
command-line options
A patch/PR is ready. Depending on the chosen command-line options, a 10-20%
speed-up should be visible if DNS look-ups, normalization and filtering are off.
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