We are pleased to announce the release of a host-level web graph of recent monthly crawls (February, March, April 2017). The graph consists of 385 million nodes and 2.5 billion pages.

The following results from the development of this graph:

  • a ranked list of hosts to expand the crawl frontier;
  • pages ranked by Harmonic Centrality with less influence from spam, among other attributes (for comparison we include PageRank);
  • the template/process for Common Crawl to produce graphs and page rankings at regular intervals.

We produced this graph, and intend to produce similar graphs going forward, because the Common Crawl community has expressed a strong interest in using Common Crawl data for graph processing, particularly with respect to:

*Please note: the graph includes dangling nodes i.e. hosts that have not been crawled yet are pointed to from a link on a crawled page. Seventeen percent (65 million) of the hosts represented have been crawled in one of the three monthly crawls. Thus, 320 million of the hosts represented in the graph are known only from links. (Host names are not wholly verified: host names that are obviously invalid are skipped; others are not resolved in DNS.)

 

Extraction of links and construction of the graph

Links are taken from WAT extracts but we also included redirects from WARC files of the redirect and 404 dataset. All types of links are included, including pure “technical” ones pointing to JavaScript libraries, web fonts, etc.

The host names are reversed and a leading www. is stripped: www.subdomain.example.com becomes com.example.subdomain. Node IDs are assigned sequentially to the the node list sorted by reversed host name. This keeps links between hosts of the same domain or in the same country-code top-level domain close together and allows for an efficient delta-compression of edges.

The extraction is done in three steps:

  • links are extracted, reduced to host-level links and stored as pairs 〈reversed host from, rev. host to〉
  • host names are assigned to IDs and edges are represented as 〈from id, to id〉 pairs
  • ranks are computed.

The first two steps are done by Spark and Python; the code is part of the project cc-pyspark. To compute the rankings the webgraph is loaded into the WebGraph framework.

 

Hosts ranked by Harmonic Centrality and PageRank

We provide a list of ranked nodes (host names) by

You can download the ranks of all 385 millions hosts. Below are the top 1000 hosts ranked by Harmonic Centrality.

Top 1000 hosts ranked by harmonic centrality

harmonic
centrality
rank
hc valuepage rankpage rank
value
reversed hostname
1380394081.00775205com.facebook
2349580843.00428814com.twitter
3335404402.00540973com.googleapis.fonts
4328874864.00286281com.youtube
5311288867.00167971com.google.plus
6303758126.00183995com.google
72853544212.00101167com.linkedin
82830483210.00118472com.instagram
9280868348.00158847com.blogger
102758349422.00055368com.pinterest
112721818840.00029768org.wikipedia.en
122707850415.00080352org.wordpress
132695958629.00043823com.apple.itunes
142666668226.00053618com.blogspot.bp.2
152664547225.00053637com.blogspot.bp.4
162662702668.00020569be.youtu
172659304624.00053727com.blogspot.bp.3
182657299620.00057575com.blogspot.bp.1
192652271058.00022707com.amazon
202649159633.00035486com.google.play
212646905619.00059326com.google.maps
222646742450.00024854com.vimeo
232644344845.00027360com.flickr
24264240445.00219270org.gmpg
252632463637.00031984com.google.mail
262631806043.00028895gl.goo
272628683644.00028723com.github
282628018865.00021446com.microsoft
292612469079.00018142com.google.support
302610349232.00043580com.adobe
3126085138100.00016162ly.bit
322604600298.00016696com.google.docs
3326023404108.00013636org.w3
3426014732152.00010471com.facebook.developers
352594901230.00043749me.wp
3625905092222.00007208com.nytimes
372584512472.00019664com.google.sites
3825833394186.00008012com.facebook.m
3925790176138.00011458com.weibo
4025732096147.00010760com.apple
412571563439.00029787com.paypal
422569229038.00030937co.t
4325689954407.00004073com.huffingtonpost
4425679134115.00013061org.creativecommons
4525657428188.00007975com.facebook.apps
462560992611.00112239com.blogblog.resources
4725583454414.00004019com.forbes
4825546588131.00012114com.imgur
4925535844416.00004002net.slideshare
5025508504669.00002026com.mashable
5125503482454.00003445com.tinyurl
522549839652.00024415com.etsy
5325478394659.00002054com.businessinsider
5425475376201.00007711com.google.drive
552547533427.00050381com.wordpress
5625458606481.00003153com.washingtonpost
5725411174189.00007959com.myspace
5825387732146.00010823com.medium
5925383148417.00003969uk.co.bbc
6025381774415.00004003com.imdb
6125381672603.00002224com.wired
6225361154572.00002431com.techcrunch
6325349038428.00003804com.bing
6425347080183.00008131com.google.groups
6525339734807.00001619com.time
6625325246473.00003265com.theguardian
6725313804447.00003533uk.co.amazon
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6925309096162.00009843com.feedburner.feeds
7025281640306.00006533com.tumblr
7125275352190.00007951com.soundcloud
7225266250694.00001917uk.co.dailymail
7325255004570.00002446com.surveymonkey
7425252200181.00008142org.archive.web
752525054076.00018708com.eventbrite
7625236658171.00008740com.google.developers
772523528659.00022308com.vimeo.player
7825226754613.00002197org.mozilla.addons
7925220086777.00001695com.wsj.online
8025203382316.00006277com.yahoo
81251928201356.00001042com.wsj.blogs
8225177614336.00005412com.issuu
8325174772828.00001586com.latimes
842517348266.00021367com.vk
8525164782628.00002133com.cnn
8625163448396.00004196com.dropbox
8725154430588.00002310me.about
8825149472698.00001900org.npr
8925121032504.00002963com.meetup
9025105294112.00013267com.gravatar
91251034881094.00001268com.theatlantic
9225100710652.00002072com.gmail
9325099516528.00002776org.wikimedia.upload
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101250673921439.00000979com.economist
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104250361481619.00000895com.thenextweb
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10725024186476.00003199com.google.translate
10825022650530.00002745com.dailymotion
10925022502170.00008762com.facebook.fr-fr
11025012510713.00001855gov.whitehouse
11124989682501.00002977gov.nih.nlm.ncbi
1122498434480.00018111com.twitter.mobile
113249653741457.00000967ca.cbc
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11724936464219.00007270com.microsoft.windows
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119249308461067.00001298com.cnbc
120249307222132.00000684com.youtube.m
121249223601299.00001085com.buzzfeed
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123249143681522.00000924com.newyorker
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12524906018671.00002023com.geocities
126249006242899.00000490net.boingboing
127248888381318.00001070com.gizmodo
12824878576355.00005095com.netvibes
12924869944826.00001589com.prnewswire
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131248540061340.00001059com.engadget
1322485297854.00024174net.sourceforge
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13524845912955.00001522uk.co.guardian
136248439041164.00001206uk.co.independent
13724836756168.00009144com.google.code
138248356421080.00001280com.nature
13924830762782.00001688com.bizjournals
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14324821860151.00010505org.mozilla
14424821036212.00007504com.facebook.web
145248200421785.00000829com.pcworld
14624815138589.00002307com.ebay
14724808886196.00007819com.qq.t
14824802454159.00010021com.amazonaws.s3
149247873041360.00001039com.foxnews
150247831681482.00000940com.slate
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15224779900648.00002090com.ibm
153247748722022.00000727com.arstechnica
154247716082715.00000522com.indiatimes.timesofindia
155247693802004.00000732au.net.abc
156247687021660.00000885com.marketwatch
15724768442424.00003843de.amazon
15824768200472.00003274com.google.feedproxy
15924756046221.00007213com.facebook.en-gb
1602475310297.00017011com.facebook.l
16124753098373.00004743com.digg
162247514801407.00001004com.ft
16324747080356.00005021com.microsoft.support
164247469201621.00000895com.quora
165247455001929.00000769com.gigaom
166247418681728.00000861com.sfgate
167247401501121.00001241tv.ustream
168247273861454.00000968com.chicagotribune
169247260661432.00000981com.wikihow
17024719856174.00008585com.messenger
17124713146136.00011598com.istockphoto
17224711160344.00005293com.stumbleupon
173247066921055.00001315uk.co.bbc.news
174247056982007.00000732com.boston
175247022882028.00000723com.searchengineland
176246998041193.00001154com.cafepress
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1782469125817.00069783com.google.accounts
17924686178609.00002203com.usatoday
180246823021538.00000919com.indiegogo
18124659484997.00001423com.google.books
18224658388963.00001506com.yahoo.finance
18324655636637.00002121com.yahoo.groups
18424652858452.00003483com.google.news
18524651408349.00005207com.googleusercontent.lh4
18624648530339.00005363jp.co.amazon
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945237049585382.00000254com.active
946237044108643.00000158ar.com.lanacion
9472370422411282.00000129com.ssrn
9482370417614358.00000102com.gazette
949237041563007.00000471org.pewinternet
9502370378812315.00000119org.caringbridge
951237022686669.00000207fm.ask
952237018067727.00000179com.politifact
9532370145212920.00000113com.theoatmeal
9542370069277.00018590com.twitter.api
9552370006811585.00000126org.brainpickings
956236995706414.00000215com.harpercollins
9572369925019689.00000075net.360cities
9582369916655038.00000028nz.co.sciblogs
959236974584465.00000310com.starbucks
960236973825868.00000233com.elle
9612369681228485.00000054com.listverse
96223695400564.00002484com.booking
963236936682996.00000473com.dallasnews
964236931603621.00000384com.pastebin
965236922266156.00000225com.purevolume
966236919541310.00001077com.amazon.smile
9672369136232716.00000046com.truthdig
968236912865706.00000240com.knowyourmeme
9692368758225990.00000058com.babble.blogs
970236860803355.00000421com.vanityfair
9712368569832746.00000046net.fubiz
97223685224562.00002501com.giphy
973236844822113.00000689com.intel
974236838543139.00000447com.livescience
9752368306013332.00000110uk.org.iwm
976236827605190.00000265com.randomhouse
977236815201191.00001159es.google.maps
9782368117637675.00000040com.tucsonweekly
979236801429980.00000136com.gilt
980236784642799.00000503com.gstatic.t2
981236784088966.00000152org.thisamericanlife
9822367816422636.00000066uk.co.creativereview
983236763485792.00000235com.microsofttranslator
984236761901633.00000891gov.sec
9852367450017492.00000084com.penny-arcade
986236739961210.00001140com.springer.link
987236736262412.00000596com.redhat
9882367312619650.00000075org.newsbusters
98923672884238.00006976com.facebook.el-gr
990236728188628.00000158com.heavy
991236721449097.00000150com.globalpost
9922367149614074.00000104com.wisegeek
993236709107992.00000172com.animoto
99423670052778.00001694com.naver.blog
995236693228386.00000164com.time.techland
996236691908652.00000158com.jalopnik
997236686843562.00000391com.indiatimes.economictimes
99823667394474.00003251ru.vkontakte
999236665521487.00000937com.msnbc
10002366609416350.00000090com.rockpapershotgun

 

Data and download instructions

The host-level graph as well as the rankings are placed on AWS S3 on the path

s3://commoncrawl/projects/hyperlinkgraph/cc-main-2017-feb-mar-apr-hostgraph/

Alternatively, you can use

https://commoncrawl.s3.amazonaws.com/projects/hyperlinkgraph/cc-main-2017-feb-mar-apr-hostgraph/

as prefix to access the files from everywhere.

The following files and formats are provided:

SizeFileDescription
2.72 GBvertices.txt.gznodes ⟨id, rev host⟩
9.42 GBedges.txt.gzedges ⟨from_id, to_id⟩
4.51 GBbvgraph.graphgraph in BVGraph format
0.22 GBbvgraph.offsets
1 kBbvgraph.properties
5.06 GBbvgraph-t.graphtranspose of the graph (outlinks mapped to inlinks)
0.47 GBbvgraph-t.offsets
1 kBbvgraph-t.properties
1 kBbvgraph.statsWebGraph statistics
6.26 GBranks.txt.gzharmonic centrality and pagerank

We hope the data will be useful for you to do any kind of research on ranking, graph analysis, link SPAM detection, etc. Let us know about your results via Common Crawl’s Google Group!

 

Credits

Thanks to

  • Web Data Commons, for their web graph data set and everything related.
  • Common Search; we first used their web graph to expand the crawler frontier, and Common Search’s cosr-back project was an important source for detail on processing our data with PySpark.
  • the authors of the WebGraph framework, whose software simplifies the computation of ranks.