sebastian-nagel opened a new pull request #518:
URL: https://github.com/apache/nutch/pull/518
Because it's a Nutch/Hadoop tool it really uses the same configuration
mechanism as all other tools, including command-line overrides:
```bash
$> bin/nutch showproperties | (head -2 && grep delay)
conf.name conf.value
substituted.value
================================================================================
crawl.gen.delay
604800000
fetcher.max.crawl.delay
30
fetcher.min.crawl.delay ${fetcher.server.delay}
5.0
fetcher.server.delay
5.0
fetcher.server.min.delay
0.0
ipc.client.tcpnodelay
true
page.load.delay
3
# command-line override of fetcher.server.delay:
$> bin/nutch showproperties -Dfetcher.server.delay=10.0 | (head -2 && grep
delay)
conf.name conf.value
substituted.value
================================================================================
crawl.gen.delay
604800000
fetcher.max.crawl.delay
30
fetcher.min.crawl.delay ${fetcher.server.delay}
10.0
fetcher.server.delay
10.0
fetcher.server.min.delay
0.0
ipc.client.tcpnodelay
true
page.load.delay
```
If configured and substituted value are identical only one is shown.
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