Posted by randfish It’s that time of the month. Open Site Explorer , the Mozbar , our tools and the API all have new link data as of today. Much of this index is quite fresh, but with a caveat – there was a period of crawler downtime so some data from early in the index may be older (histogram below). It’s slightly smaller than our prior index, coming in at 69 Billion URLs (compared to July 6th’s 72 Billion). (note that some data may be as old as May, but anything re-crawled in July would overwrite that older data, so there should be a significant amount of very fresh stuff in this index) And, in more potentially good news (though it’s hard to count chickens before they hatch given AWS’ unreliability), we have another index that may be ready in the next 2-3 weeks, meaning more consistent updates. We’re kicking off indices nearly every week at this point to help account for Amazon’s weaknesses and give us a better chance of delivering on-time updates. This has pushed our costs into stratospheric territory ($600-$700K+/month to run Mozscape these days), but we can tolerate this pain a little longer while we work to move to our new hybrid cloud on our own, far-more-stable machines. Let’s take a look at the full metrics for this index: 69,615,071,013 (69 billion) URLs 692,061,972 (692 million) Subdomains 164,242,043 (164 million) Root Domains 712,648,940,825 (712 billion) Links Followed vs. Nofollowed 2.26% of all links found were nofollowed 55.01% of nofollowed links are internal 44.99% are external Rel Canonical 13.45% of all pages now employ a rel=canonical tag The average page has 74 links on it 62.43 internal links on average 11.13 external links on average And here are the latest correlations between Mozscape metrics and Google’s search results: Page Authority – 0.34 Domain Authority – 0.23 MozRank – 0.20 Linking Root Domains – 0.24 Total Links – 0.20 External Links – 0.24 You’ll also find that some of the bugs around anchor text from the prior index are much improved. There may be a few artifacts of odd data, but 99% of queries won’t surface these. Happy link data day to all! And please write in with feedback (or leave it in the feature request forum ). Sign up for The Moz Top 10 , a semimonthly mailer updating you on the top ten hottest pieces of SEO news, tips, and rad links uncovered by the Moz team. Think of it as your exclusive digest of stuff you don’t have time to hunt down but want to read!
August Mozscape Update
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