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WARC files should use record-at-time compression #7

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jnioche opened this issue Jul 22, 2016 · 1 comment
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WARC files should use record-at-time compression #7

jnioche opened this issue Jul 22, 2016 · 1 comment

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jnioche commented Jul 22, 2016

The WARC standard recommends to compress every record independently "record-at-time". This feature is required by wayback machines including http://index.commoncrawl.org/.

Copied from commoncrawl/news-crawl#4
@jnioche jnioche mentioned this issue Jul 22, 2016
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jnioche commented Jul 22, 2016 •
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Using a SequenceFileBolt won't allow us to generate a well formed WARC file. See [https://github.com/ept/warc-hadoop/blob/master/src/main/java/com/martinkl/warc/mapred/WARCOutputFormat.java] for an example of using a custom outputformat.

CC's WARC writer uses an extension of GZIPOutputStream

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