Webmaster level: advanced
Recently the Google Public DNS team, in collaboration with Akamai, reached an important milestone: Google Public DNS now propagates client location information to Akamai nameservers. This effort significantly improves the accuracy of approximately 30% of the location-sensitive DNS responses returned by Google Public DNS. In other words, client requests to Akamai hosted content can be routed to closer servers with lower latency and greater data transfer throughput. Overall, Google Public DNS resolvers serve 400 billion responses per day and more than 50% of them are location-sensitive.
DNS is often used by Content Distribution Networks (CDNs) such as Akamai to achieve location-based load balancing by constructing responses based on clients’ IP addresses. However, CDNs usually see the DNS resolvers’ IP address instead of the actual clients’ and are therefore forced to assume that the resolvers are close to the clients. Unfortunately, the assumption is not always true. Many resolvers, especially those open to the Internet at large, are not deployed at every single local network.
To solve this issue, a group of DNS and content providers, including Google, proposed an approach to allow resolvers to forward the client’s subnet to CDN nameservers in an extension field in the DNS request. The subnet is a portion of the client’s IP address, truncated to preserve privacy. The approach is officially named edns-client-subnet or ECS.
This solution requires that both resolvers and CDNs adopt the new DNS extension. Google Public DNS resolvers automatically probe to discover ECS-aware nameservers and have observed the footprint of ECS support from CDNs expanding steadily over the past years. By now, more than 4000 nameservers from approximately 300 content providers support ECS. The Google-Akamai collaboration marks a significant milestone in our ongoing efforts to ensure DNS contributes to keeping the Internet fast. We encourage more CDNs to join us by supporting the ECS option.
For more information about Google Public DNS, please visit our website. For CDN operators, please also visit “A Faster Internet” for more technical details.
Webmaster Level: intermediate to advanced
App deep links are the new kid on the block in organic search, and they’re picking up speed faster than you can say “schema.org ViewAction”! For signed-in users, 15% of Google searches on Android now return deep links to apps through App Indexing. And over just the past quarter, we've seen the number of clicks on app deep links jump by 10x.
We’ve gotten a lot of feedback from developers and seen a lot of implementations gone right and others that were good learning experiences since we opened up App Indexing back in June. We’d like to share with you four key steps to monitor app performance and drive user engagement:
App indexing is a team effort between you (as a webmaster) and your app development team. We show information in Webmaster Tools that is key for your app developers to do their job well. Here’s what’s available right now:
We’ve noticed that very few developers have access to Webmaster Tools. So if you want your app development team to get all of the information they need to fix app-related issues, it’s essential for them to have access to Webmaster Tools.
Any verified site owner can add a new user. Pick restricted or full permissions, depending on the level of access you’d like to give:
How are users engaging with your app from search results? We’ve introduced two new ways for you to track performance for your app deep links:
Blocked resources are one of the top reasons for the “content mismatch” errors you see in Webmaster Tools’ Crawl Errors report. We need access to all the resources necessary to render your app page. This allows us to assess whether your associated web page has the same content as your app page.
To help you find and fix these issues, we now show you the specific resources we can’t access that are critical for rendering your app page. If you see a content mismatch error for your app, look out for the list of blocked resources in “Step 5” of the details dialog:
To help you identify errors when indexing your app, we’ll send you messages for all app errors we detect, and will also display most of them in the “Android apps” tab of the Crawl errors report.
In addition to the currently available “Content mismatch” and “Intent URI not supported” error alerts, we’re introducing three new error types:
In our experience, the majority of errors are usually caused by a general setting in your app (e.g. a blocked resource, or a region picker that pops up when the user tries to open the app from search). Taking care of that generally resolves it for all involved URIs.
Good luck in the pursuit of appiness! As always, if you have questions, feel free to drop by our Webmaster help forum.
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