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COLLECTED BY

The Open Syllabus collection contains WARC files from a mid-2021 crawl of about 50 million unique seed URLs extracted from the Open Syllabus version 2.6 dataset and their page requisites. The bulk of the seed URLs are from ".com", ".org", ".edu", and ".uk" TLDs.

Crawl Summary

Crawl start: 2021-04-12
Crawl end: 2021-09-05
Seed URLs: 49,735,419
Archived URLs: 338,690,414
Collection Size: 25 TB
Crawler: Heritrix/3.3.0-hq1-SNAPSHOT-2015-03-16T18:09:23Z
Crawl depth: maxHops=0

Seed Summary

Unique URLs: 49,735,419
Unique Canonical URLs: 48,956,395
Unique Hosts: 984,223
IPv4 Addresses: 3,328
Unique TLDs: 21,761
Unique IANA Valid TLDs: 739
Wayback Machine URLs*: 6,568,213

* NOTE: More than 13% URLs in the dataset point to Wayback Machine!

TIMESTAMPS

Apr	MAY	Jun
	06
2020	2021	2022