O projeto TOFFEE
CASADOCUMENTAÇÃOATUALIZAÇÕESVÍDEOSPESQUISADESCARREGARPATROCINADORESCONTATO


RESEARCH 》 CDN Introduction - Content Delivery Networks or Content Distribution Networks

A Website without CDN Network: As everyone knows in a most common typical simplest scenario, you will have a website hosted in a web-server. In most common cases a typical small website will be hosted in some web-server, provided by web-hosting service provider. And the website DNS domain name points to this hosting web-server. In a simple scenario like this when the user requests the pages (or in general we can say any content such as text pages, images, and other media), the end-user’s browser request reaches this web-server, and the web-server delivers the web-pages via HTTP Protocol.
CDN Introduction website without CDN

Local user Browser Cache: The process of page or content download is pretty straight forward in a web-browser. A web-browser will have a small local cache. So that if there is any future repetitive requests, instead each time fetching from the main website (web-server), the browser will load/render the pre-cached content directly in the browser interface if it finds that specific content already once stored earlier in its cache. This saves up a lot of traffic. Since most of the times any website will have a lot of common content, such as logos, some Java scripts, CSS Stylesheets and so on. But the only drawback is that if there is a small organization, then each user have to access the content atleast once, so that they get their browser cache stored with content. In this case it is a highly discrete or non-shared cache platform/scenario.

Local web Proxy/Caching Servers: So in a office, or any such setup, where there are N users accessing common Internet resource, we can deploy a common web proxy or caching server(s). These servers (or a server) will create a great opportunity of creating a localized common caching scenario. So in this mode assume if one user accesses a website for first time, assume few of its contents are cached in this caching server, then later that day whichever other user accesses the same content, they may receive cached content from this central caching/proxy server. This is a huge advantage. Once the cache is mature and holds enough cached contents, it will sometimes exponentially reduce the network load, and downloading repetitive data from Internet (or any network in general).

A Website via CDN Network: In this scenario, the main basic website acts much like a source or origin. It will contain the web-content but it will not serve the real end-users. Instead there is going to be a CDN Service provider, and his vast infrastructure with several distributed, so called CDN Nodes across Internet spread globally. When the end-user requests the website, it is these CDN caching nodes will actually server the content to the end users. The job of the CDN service provider is to provide a highly redundant load-sharing along with transparent/abstract infrastructure. The CDN provider will often point or assign a CDN node which is least used at that instance, also sometimes assigns dynamically a CDN Node which is geographically nearer to the end-user. Hence this reduces the download time, since it reduces the number of router hops in internet.
CDN Introduction website with CDN

A CDN Node is often a highly proprietary caching resource installed by the CDN Service provider, where when it gets a request of a content to be served from end-user browsers, it caches the pages/content from its neighboring CDN Nodes, or sometimes directly from the origin web-servers. So this will exponentially reduces the load on the origin webserver. It is like with CDN server, the load on the origin webserver is or can be reduced upto 70-80% or sometimes even more depending on the content nature and depending on static vs. dynamic content it has.

So this is how a basic CDN works, its significance and value addition for any website if it is served to users via CDN, versus served directly via single webserver (or just few redundant web-servers) without a CDN.

Apart from this there are various advantages in using a CDN within your deployments. To know more about CDN Advantages kindly read the full detailed article HERE.



Suggested Topics:


Generic CDN


Building my own CDN

💎 TOFFEE-MOCHA new bootable ISO: Download
💎 TOFFEE Data-Center Big picture and Overview: Download PDF


Tópicos recomendados:

First TOFFEE-Butterscotch Code Release ↗
Saturday' 13-Mar-2021
TOFFEE-Butterscotch is a variant of TOFFEE can be used to save and optimize your Home/SOHO Internet/WAN bandwidth. Unlike TOFFEE (and TOFFEE-DataCenter) TOFFEE-Butterscotch is a non peer-to-peer (and asymmetric) network optimization solution. This makes TOFFEE-Butterscotch an ideal tool for all Home and SOHO users.

Grid Hosting vs CDN Hosting ↗
Saturday' 13-Mar-2021

TCP Tune-up and Performance Analysis Graphs - Congestion Control - Research - Dos and Don'ts ↗
Saturday' 13-Mar-2021

TOFFEE-Butterscotch Bandwidth saver software development - Update: 17-Nov-2016 ↗
Saturday' 13-Mar-2021
Here is my second software development update of TOFFEE-Butterscotch. In the previous update (28-Oct-2016) I discussed about the Alerts, etc. Whereas in my first TOFFEE-Butterscotch news update I have introduced about TOFFEE-Butterscotch research, project specifications, use-cases, etc.

WAN Optimization iPhone and Android - Mobile App ↗
Saturday' 13-Mar-2021

Upgrading Ubuntu 17.10 to 18.04 via TOFFEE-DataCenter WAN Optimization Screenshots ↗
Saturday' 13-Mar-2021

Assista no Youtube - [444//1] 158 VLOG - TOFFEE WAN Optimization Software Development live update - 6-Nov-2016 ↗


Communication data network standards and data transfer speeds :: Chart ↗
Saturday' 13-Mar-2021
Here is a complete chart comprising popular communication data network standards and their respective transfer rates. I hope this reference chart will help network engineers and network software developers while performing networking tests and experiments, building WAN/network products, building WAN simulated networks of a specific standard and so on. This may also helps us to track technological advancements of communication data networks.

Building my own CDN - choosing a web-hosting to deploy my CDN - Update: 28-July-2016 ↗
Saturday' 13-Mar-2021
The TOFFEE Project website is hosted on Inmotion Hosting. And so I am looking for alternate hosting provider to build my first CDN node. My plan is to make multiple sub-domains of my website such as cdn1.the-toffee-project.org, cdn2.the-toffee-project.org and point each of this corresponding subdomain(s) to various alternative web hosting servers geographically spread across the world. Sometimes choosing the same vendor for multiple CDN nodes may result multiple servers existing in the data-center. And this becomes an issue if there is some catastrophic network disaster.

Power consumption of my Home Lab devices for research ↗
Saturday' 13-Mar-2021
Here is my power-consumption measurements of various devices deployed within my home lab. I measured via my kill-a-watt sort of power-meter which is fairly reliable and accurate. I checked its accuracy with various standard load such as Philips LED laps and other constant power-consuming devices to make sure that the power-meter is precise.

TOFFEE (and TOFFEE-DataCenter) deployment with web-proxy cache ↗
Saturday' 13-Mar-2021
If you want to deploy TOFFEE along with a web-proxy cache (such as Squid Proxy) you can deploy the same as shown below. TOFFEE does not cache files. TOFFEE does packet level network optimization. So if you want caching your web content you can use transparent mode web-proxy cache intercepting your WAN links. A web-proxy may reduce amount of data being processed (optimized) within these TOFFEE devices and so reduce the CPU overheads and improve its performance.



Featured Educational Video:
Assista no Youtube - [824//1] x23e TrueNAS ZFS Pool Resilver over and over again issue | ZFS NAS Storage | Forever Resilver ↗

TOFFEE-Butterscotch Bandwidth saver software development - Update: 17-Nov-2016 ↗
Saturday' 13-Mar-2021
Here is my second software development update of TOFFEE-Butterscotch. In the previous update (28-Oct-2016) I discussed about the Alerts, etc. Whereas in my first TOFFEE-Butterscotch news update I have introduced about TOFFEE-Butterscotch research, project specifications, use-cases, etc.

Communication data network standards and data transfer speeds :: Chart ↗
Saturday' 13-Mar-2021
Here is a complete chart comprising popular communication data network standards and their respective transfer rates. I hope this reference chart will help network engineers and network software developers while performing networking tests and experiments, building WAN/network products, building WAN simulated networks of a specific standard and so on. This may also helps us to track technological advancements of communication data networks.

TOFFEE deployment topology guide ↗
Saturday' 13-Mar-2021
Assume you have two sites (such as Site-A and Site-B) connected via slow/critical WAN link as shown below. You can optimize this link by saving the bandwidth as well possibly improve the speed. However, the WAN speed can be optimized only if the WAN link speeds are below that of the processing latency of your TOFFEE installed hardware. Assume your WAN link is 12Mbps, and assume the maximum WAN optimization speed/capacity of Raspberry Pi is 20Mbps, then your link will get speed optimization too. And in another case, assume your WAN link is 50Mbps, then using the Raspberry Pi as WAN Optimization device will actually increase the latency (i.e slows the WAN link). But in all the cases the bandwidth savings should be the same irrespective of the WAN link speed. In other words, if you want to cut down the WAN link costs via this WAN Optimization set up, you can always get it since it reduces the overall bandwidth in almost all the cases (including encrypted and pre-compressed data).

Optimization of network data (WAN Optimization) at various levels ↗
Saturday' 13-Mar-2021
WAN Network data can be optimized at various levels depending upon the network applications, protocols, topology and use-cases. So the amount of data you can optimize will depend on the strategy you choose to optimize. Such as: Network Packet level optimization, Session level optimization, File level optimization, etc.



Assista no Youtube - [858//1] 280 WAN Optimization - Animated demo of Packet Optimization in TOFFEE-DataCenter ↗

TOFFEE-Butterscotch a TOFFEE for Home/SOHO Internet/WAN bandwidth ↗
Saturday' 13-Mar-2021
TOFFEE-Butterscotch a TOFFEE for Home/SOHO Internet/WAN bandwidth



Research :: Optimization of network data (WAN Optimization) at various levels:
Network File level network data WAN Optimization


Learn Linux Systems Software and Kernel Programming:
Linux, Kernel, Networking and Systems-Software online classes [CDN]


Hardware Compression and Decompression Accelerator Cards:
TOFFEE Architecture with Compression and Decompression Accelerator Card


TOFFEE-DataCenter on a Dell Server - Intel Xeon E5645 CPU:
TOFFEE-DataCenter screenshots on a Dual CPU - Intel(R) Xeon(R) CPU E5645 @ 2.40GHz - Dell Server