Affects of multiple subdomains on homebrew CDN for images
-
We're creating our own CDN such that instead of serving images from
http://mydomain.com/images/shoe.jpg
It will appear at all of the following subdomains:
http://cdn1.mydomain.com/images/shoe.jpg
http://cdn2.mydomain.com/images/shoe.jpg
http://cdn3.mydomain.com/images/shoe.jpg
http://cdn4.mydomain.com/images/shoe.jpg
Image tags on our pages will randomly choose any subdomain for the src. The thought was this will make page loading faster by paralellizing requests across many cookie-less domains.
How does this affect :
-Ranking of images on Google image search.
-Ranking of pages they appear on
-Domain authority (images are linked to heavily in our social media efforts, so we will 301 redirect image urls to cdn1.mydomain.com)
Should we disallow all but one CDN domain in robots.txt? Will robots.txt on an image only subdomain even be retrieved? Should we just use 1 CDN subdomain instead?
Got a burning SEO question?
Subscribe to Moz Pro to gain full access to Q&A, answer questions, and ask your own.
Browse Questions
Explore more categories
-
Moz Tools
Chat with the community about the Moz tools.
-
SEO Tactics
Discuss the SEO process with fellow marketers
-
Community
Discuss industry events, jobs, and news!
-
Digital Marketing
Chat about tactics outside of SEO
-
Research & Trends
Dive into research and trends in the search industry.
-
Support
Connect on product support and feature requests.
Related Questions
-
Not all images indexed in Google
Hi all, Recently, got an unusual issue with images in Google index. We have more than 1,500 images in our sitemap, but according to Search Console only 273 of those are indexed. If I check Google image search directly, I find more images in index, but still not all of them. For example this post has 28 images and only 17 are indexed in Google image. This is happening to other posts as well. Checked all possible reasons (missing alt, image as background, file size, fetch and render in Search Console), but none of these are relevant in our case. So, everything looks fine, but not all images are in index. Any ideas on this issue? Your feedback is much appreciated, thanks
Technical SEO | | flo_seo1 -
Could the EMD update affect my domain?
My domain is: http://www.freescrabbledictionary.com/ "Scrabble Dictionary" is a huge keyword in my niche where I used to rank top 4. Do you see this domain as possibly being hit by the EMD? My Google Analytics does not show that I was initially hit back in Sept 2012 when it first same out.
Technical SEO | | cbielich0 -
Robots.txt and Multiple Sitemaps
Hello, I have a hopefully simple question but I wanted to ask to get a "second opinion" on what to do in this situation. I am working on a clients robots.txt and we have multiple sitemaps. Using yoast I have my sitemap_index.xml and I also have a sitemap-image.xml I do put them in google and bing by hand but wanted to have it added into the robots.txt for insurance. So my question is, when having multiple sitemaps called out on a robots.txt file does it matter if one is before the other? From my reading it looks like you can have multiple sitemaps called out, but I wasn't sure the best practice when writing it up in the file. Example: User-agent: * Disallow: Disallow: /cgi-bin/ Disallow: /wp-admin/ Disallow: /wp-content/plugins/ Sitemap: http://sitename.com/sitemap_index.xml Sitemap: http://sitename.com/sitemap-image.xml Thanks a ton for the feedback, I really appreciate it! :) J
Technical SEO | | allstatetransmission0 -
Automatic subdomain redirection programmed over a given period?
Hi all, I have a technical problem that is quite beyond my "expertise", and I'm wondering if someone can help me to find a way to handle this. My website automatically changes appearance and some content as well twice a year (summer and winter), and we also change the sub domain, like this: September to may > www.nameofmysite.com and june to august > summer.nameofmysite.com I know it's a bit tricky, and we're doing this with a 303 redirection and will also provide a possibility (via a button) to switch beetwen "seasons". To sum up, during the "summer" I've got: http://summer.nameofmysite.com/webzine/news/name-of-my-page.html and during the "winter": http://www.nameofmysite.com/webzine/news/name-of-my-page.html As you can see, it's the same content, with a temporary redirection 303. Thanks you very much in advance! Simon
Technical SEO | | Simon-0 -
Using Rel=Author with Multiple Contributors
I have multiple contributors who provide content on our page. I have created an authors page that shows the picture and bio of each author along with their Google+ profile link. Each profile link goes to the authors respective profile where I have had them verify themselves as contributors. My question is will Google see each of these authors and attribute the rel=author tag correctly (even though they are listed on the same profile page) or will Google only take the first person I point to for Rel=Author?
Technical SEO | | PLEsearch0 -
Subdomain and Domain Rankings
I have read here that domain names with keywords might add a boost to your search rank For instance using a completely inane example monkey-fights.com might get a boost compared to mfl.com (monkey fighting league) when searching for "monkey fights" There seems to be a hot debate as to how much bonus the first domain might get over the second, but leaving that aside for the moment. Question 1. Would monkey-fights.mfl.com get the same kind of bonus as a root domain bonus? Question 2. If the answer to 1 above was yes would a 301 redirect from the suddomain URL to root domain URL retain that bonus I was just thinking on how hard it is to get root domains these days that are not either being squatted on etc. and if this might be a way to get the same bonus, or maybe subdomains are less bonus prone and so it would be a waste of time Thanks
Technical SEO | | bThere0 -
Blog on a subdomain vs subfolder?
Hi, Does anyone have data to show that a subfolder is better than a subdomain for a blog? From what I've read, it sounds like both are a viable option but you choose subdomain if you want to build your blog as a distinct entity. Do you get ranked more quickly with a subfolder? Do you see X% more lift? Has anyone tested or seen tests around this subject? Any input is appreciated! Thanks in advance.
Technical SEO | | sportstvjobs0 -
Any value in external links to image files?
Let's say you have www.example.com. On this website, you have www.example.com/example-image.jpg. When someone links externally to this image - like below... { is < {a href="www.example.com/example-image.jpg"} {img src="www.example.com/example-image.jpg"} {/a} The external site would be using the image hosted on your site, but the image is also linked back to the same image file on your site. Does this have any value even though the link is back to the image file and not the website? Also - how much value do you guys feel image links have in relation to tech links? In terms of passing link juice and adding to a natural link profile. Thanks!
Technical SEO | | qlkasdjfw1