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
-
Robots.txt & Disallow: /*? Question!
Hi, I have a site where they have: Disallow: /*? Problem is we need the following indexed: ?utm_source=google_shopping What would the best solution be? I have read: User-agent: *
Intermediate & Advanced SEO | | vetofunk
Allow: ?utm_source=google_shopping
Disallow: /*? Any ideas?0 -
No index detected in robots meta tag GSC issue_Help Please
Hi Everyone, We just did a site migration ( URL structure change, site redesign, CMS change). During migration, dev team messed up badly on a few things including SEO. The old site had pages canonicalized and self canonicalized <> New site doesn't have anything (CMS dev error) so we are working retroactively to add canonicalization mechanism The legacy site had URL’s ending with a trailing slash “/” <> new site got redirected to Set of url’s without “/” New site action : All robots are allowed: A new sitemap is submitted to google search console So here is my problem (it been a long 24hr night for me 🙂 ) 1. Now when I look at GSC homepage URL it says that old page is self canonicalized and currently in index (old page with a trailing slash at the end of URL). 2. When I try to perform a live URL test, I get the message "No: 'noindex' detected in 'robots' meta tag" , so indexation cant be done. I have no idea where noindex is coming from. 3. Robots.txt in search console still showing old file ( no noindex there ) I tried to submit new file but old one still coming up. When I click on "See live robots.txt" I get current robots. 4. I see that old page is still canonicalized and attempting to index redirected old page might be confusing google Hope someone can help to get the new page indexed! I really need it 🙂 Please ping me if you need more clarification. Thank you ! Thank you
Intermediate & Advanced SEO | | bgvsiteadmin1 -
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 -
Meta NoIndex tag and Robots Disallow
Hi all, I hope you can spend some time to answer my first of a few questions 🙂 We are running a Magento site - layered/faceted navigation nightmare has created thousands of duplicate URLS! Anyway, during my process to tackle the issue, I disallowed in Robots.txt anything in the querystring that was not a p (allowed this for pagination). After checking some pages in Google, I did a site:www.mydomain.com/specificpage.html and a few duplicates came up along with the original with
Intermediate & Advanced SEO | | bjs2010
"There is no information about this page because it is blocked by robots.txt" So I had added in Meta Noindex, follow on all these duplicates also but I guess it wasnt being read because of Robots.txt. So coming to my question. Did robots.txt block access to these pages? If so, were these already in the index and after disallowing it with robots, Googlebot could not read Meta No index? Does Meta Noindex Follow on pages actually help Googlebot decide to remove these pages from index? I thought Robots would stop and prevent indexation? But I've read this:
"Noindex is a funny thing, it actually doesn’t mean “You can’t index this”, it means “You can’t show this in search results”. Robots.txt disallow means “You can’t index this” but it doesn’t mean “You can’t show it in the search results”. I'm a bit confused about how to use these in both preventing duplicate content in the first place and then helping to address dupe content once it's already in the index. Thanks! B0 -
Using 2 wildcards in the robots.txt file
I have a URL string which I don't want to be indexed. it includes the characters _Q1 ni the middle of the string. So in the robots.txt can I use 2 wildcards in the string to take out all of the URLs with that in it? So something like /_Q1. Will that pickup and block every URL with those characters in the string? Also, this is not directly of the root, but in a secondary directory, so .com/.../_Q1. So do I have to format the robots.txt as //_Q1* as it will be in the second folder or just using /_Q1 will pickup everything no matter what folder it is on? Thanks.
Intermediate & Advanced SEO | | seo1234560 -
Block an entire subdomain with robots.txt?
Is it possible to block an entire subdomain with robots.txt? I write for a blog that has their root domain as well as a subdomain pointing to the exact same IP. Getting rid of the option is not an option so I'd like to explore other options to avoid duplicate content. Any ideas?
Intermediate & Advanced SEO | | kylesuss12