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CloudFlare Railgun FAQ
1. What is CloudFlare?
CloudFlare is a third party service that we offer to our hosting customers. CloudFlare provides performance, security and availability to web properties. CloudFlare runs a globally distributed network where they automatically cache static content, filter malicious traffic and help offload big spikes in traffic. On average, a site loads twice as fast, uses 65% fewer server resources and has an additional layer of security.
2. What is Railgun?
Railgun is a WAN optimization technology that we offer our hosting customers in partnership with a company called CloudFlare.
CloudFlare’s Railgun technology greatly speeds up the delivery of non-cached pages. While CloudFlare automatically caches 65% of the resources needed to make up a page, 35% can't be cached because the resources are dynamically generated or marked as 'do not cache'. That 35% is often the initial HTML of the page that must be downloaded first. CloudFlare Railgun speeds this remaining 35%.
3. What are the benefits of Railgun?
Websites running Railgun show a 143% improvement in HTML load times and a 90% decrease in Time To First Byte (TTFB) responses.
4. How does Railgun work?
Railgun opens a secure, tunneled connection between the CloudFlare network and your host’s origin server where the connection only sends differences from the last request. This is similar to how video encoding works.
The markup of websites does not change that frequently from one request to the next. Instead of transferring the entire request between CloudFlare and the origin server, Railgun will transfer only the changes in markup from one request to the next. This cuts down on bandwidth, transfer time, and overall page load times. Railgun caches these differences in memory to make page processing as fast as possible.
5. What kind of sites can use Railgun?
Any website can benefit from the performance improvements Railgun offers, especially dynamic sites.
6. What much does Railgun cost?
We have partnered with CloudFlare to make Railgun both easy and affordable. If you purchase Railgun directly through CloudFlare, it costs $200/month. However, we have partnered with CloudFlare and are offering Railgun to our customers for free.
7. How do I enable Railgun on my site?
Getting started is super easy—you just need to log into your control panel and look for the CloudFlare icon. With two clicks, you can activate CloudFlare and your website will automatically be faster and safer around the world. To activate Railgun, log into your CloudFlare account, go to Performance Settings and select Railgun “On”. Next select our railgun server named cloudflare.crservers.com
8. What if I’m having issues enabling Railgun?
If you experience issues when enabling Railgun, please open a ticket with us.
9. I’m not a CloudFlare customer, can I still use Railgun?
No. You need to be a CloudFlare customer in order to use Railgun.
10. I’m seeing an error on my site and I think Railgun is causing it, what should I do?
Log into your CloudFlare account, go to Performance Settings and turn Railgun off from there. Please file a bug report with a detailed description here