Moz Q&A is closed.
After more than 13 years, and tens of thousands of questions, Moz Q&A closed on 12th December 2024. Whilst we’re not completely removing the content - many posts will still be possible to view - we have locked both new posts and new replies. More details here.
Large robots.txt file
-
We're looking at potentially creating a robots.txt with 1450 lines in it. This will remove 100k+ pages from the crawl that are all old pages (I know, the ideal would be to delete/noindex but not viable unfortunately)
Now the issue i'm thinking is that a large robots.txt will either stop the robots.txt from being followed or will slow our crawl rate down.
Does anybody have any experience with a robots.txt of that size?
-
Answered my own questions:
https://developers.google.com/webmasters/control-crawl-index/docs/robots_txt?csw=1#file-format
"A maximum file size may be enforced per crawler. Content which is after the maximum file size may be ignored. Google currently enforces a size limit of 500kb."
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
-
If Robots.txt have blocked an Image (Image URL) but the other page which can be indexed has this image, how is the image treated?
Hi MOZers, This probably is a dumb question but I have a case where the robots.tags has an image url blocked but this image is used on a page (lets call it Page A) which can be indexed. If the image on Page A has an Alt tags, then how is this information digested by crawlers? A) would Google totally ignore the image and the ALT tags information? OR B) Google would consider the ALT tags information? I am asking this because all the images on the website are blocked by robots.txt at the moment but I would really like website crawlers to crawl the alt tags information. Chances are that I will ask the webmaster to allow indexing of images too but I would like to understand what's happening currently. Looking forward to all your responses 🙂 Malika
Intermediate & Advanced SEO | | Malika11 -
Disallow URLs ENDING with certain values in robots.txt?
Is there any way to disallow URLs ending in a certain value? For example, if I have the following product page URL: http://website.com/category/product1, and I want to disallow /category/product1/review, /category/product2/review, etc. without disallowing the product pages themselves, is there any shortcut to do this, or must I disallow each gallery page individually?
Intermediate & Advanced SEO | | jmorehouse0 -
Meta Robot Tag:Index, Follow, Noodp, Noydir
When should "Noodp" and "Noydir" meta robot tag be used? I have hundreds or URLs for real estate listings on my site that simply use "Index", Follow" without using Noodp and Noydir. Should the listing pages use these Noodp and Noydr also? All major landing pages use Index, Follow, Noodp, Noydir. Is this the best setting in terms of ranking and SEO. Thanks, Alan
Intermediate & Advanced SEO | | Kingalan10 -
How to handle a blog subdomain on the main sitemap and robots file?
Hi, I have some confusion about how our blog subdomain is handled in our sitemap. We have our main website, example.com, and our blog, blog.example.com. Should we list the blog subdomain URL in our main sitemap? In other words, is listing a subdomain allowed in the root sitemap? What does the final structure look like in terms of the sitemap and robots file? Specifically: **example.com/sitemap.xml ** would I include a link to our blog subdomain (blog.example.com)? example.com/robots.xml would I include a link to BOTH our main sitemap and blog sitemap? blog.example.com/sitemap.xml would I include a link to our main website URL (even though it's not a subdomain)? blog.example.com/robots.xml does a subdomain need its own robots file? I'm a technical SEO and understand the mechanics of much of on-page SEO.... but for some reason I never found an answer to this specific question and I am wondering how the pros do it. I appreciate your help with this.
Intermediate & Advanced SEO | | seo.owl0 -
Can a large fluctuation of links cause traffic loss?
I've been asked to look at a site that has lost 70/80% if their search traffic. This happened suddenly around the 17th April. Traffic dropped off over a couple of days and then flat-lined over the next couple of weeks. The screenshot attached, shows the impressions/clicks reported in GWT. When I investigated I found: There had been no changes/updates to the site in question There were no messages in GWT indicating a manual penalty The number of pages indexed shows no significant change There are no particular trends in keywords/queries affected (they all were.) I did discover that ahrefs.com showed that a large number of links were reported lost on the 17th April. (17k links from 1 domain). These links reappeared around the 26th/27th April. But traffic shows no sign of any recovery. The links in question were from a single development server (that shouldn't have been indexed in the first place, but that's another matter.) Is it possible that these links were, maybe artificially, boosting the authority of the affected site? Has the sudden fluctuation in such a large number of links caused the site to trip an algorithmic penalty (penguin?) Without going into too much detail as I'm bound by client confidentiality - The affected site is really a large database and the links pointing to it are generated by a half dozen or so article based sister sites based on how the articles are tagged. The links point to dynamically generated content based on the url. The site does provide a useful/valuable service/purpose - it's not trying to "game the system" in order to rank. That doesn't mean to say that it hasn't been performing better in search than it should have been. This means that the affected site has ~900,000 links pointing to is that are the names of different "entities". Any thoughts/insights would be appreciated. I've expresses a pessimistic outlook to the client, but as you can imaging they are confused and concerned. LVSceCN.png
Intermediate & Advanced SEO | | DougRoberts0 -
Do you add 404 page into robot file or just add no index tag?
Hi, got different opinion on this so i wanted to double check with your comment is. We've got /404.html page and I was wondering if you would add this page to robot text so it wouldn't be indexed or would you just add no index tag? What would be the best approach? Thanks!
Intermediate & Advanced SEO | | Rubix0 -
How Do I Generate a Sitemap for a Large Wordpress Site?
Hello Everyone! I am working with a Wordpress site that is in Google news (i.e. everyday we have about 30 new URLs to add to our sitemap) The site has years of articles, resulting in about 200,000 pages on the site. Our strategy so far has been use a sitemap plugin that only generates the last few months of posts, however we want to improve our SEO and submit all the URLs in our site to search engines. The issue is the plugins we've looked at generate the sitemap on-the-fly. i.e. when you request the sitemap, the plugin then dynamically generates the sitemap. Our site is so large that even a single request for our sitemap.xml ties up tons of server resources and takes an extremely long time to generate the sitemap (if the page doesn't time out in the process). Does anyone have a solution? Thanks, Aaron
Intermediate & Advanced SEO | | alloydigital0 -
Blocking Dynamic URLs with Robots.txt
Background: My e-commerce site uses a lot of layered navigation and sorting links. While this is great for users, it ends up in a lot of URL variations of the same page being crawled by Google. For example, a standard category page: www.mysite.com/widgets.html ...which uses a "Price" layered navigation sidebar to filter products based on price also produces the following URLs which link to the same page: http://www.mysite.com/widgets.html?price=1%2C250 http://www.mysite.com/widgets.html?price=2%2C250 http://www.mysite.com/widgets.html?price=3%2C250 As there are literally thousands of these URL variations being indexed, so I'd like to use Robots.txt to disallow these variations. Question: Is this a wise thing to do? Or does Google take into account layered navigation links by default, and I don't need to worry. To implement, I was going to do the following in Robots.txt: User-agent: * Disallow: /*? Disallow: /*= ....which would prevent any dynamic URL with a '?" or '=' from being indexed. Is there a better way to do this, or is this a good solution? Thank you!
Intermediate & Advanced SEO | | AndrewY1