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How does Facebook manage 15 billion photos?

Facebook's photo sharing is very popular, so far, FacebookThe user has uploaded 15 billion photos, plus thumbnails, with a total capacity of more than 0.2 billion Pb. The number of new photos per week is 20 million, which is about 25 Tb. during peak hours, FacebookProcessing 0.55 million photos per second makes managing the data a huge challenge. This article, written by Facebook engineers, describes how they manage these photos.Old NFS photo Architec

A hbase optimization case study: Facebook Messages system problems and solutions

HDFs design is designed to store large files (such as log files), batch processing, sequential I/O. However, the original intention of hbase design on HDFs is to solve the request of random reading and writing of massive data. How do you rub together the two components that are diametrically opposed to each other's original design? This layered structure is designed to make the architecture clearer, hbase layers and hdfs layers, but it brings potential performance degradation. Two of the most co

Facebook gets key hashes

The key hashes is to let Facebook know that your app is not the app that was set up, so you can access the Facebook API. Here's how to get the key hashes: 1. Download OpenSSL first 2. Place the Openssl.exe under the C:\Program files\java\jre7\bin file 3. Open cmd.exe, go to C:\Program files\java\jre7\bin, make KeyStore file, as followsKeytool-genkey-v-keystore xxx.keystore-alias yyy-keyalg rsa-keysize 20

5 Profitable suggestions for Facebook APP

1, Sell: In fact, not just based on the Facebook app, many web App creators want their products to sell a good price (such as YouTube), do not exclude a lot of web The creator of the app's position on the profit model of his product is to sell-it seems to have become a trend. 2, Develop: An indirect way to get funds is to attract third parties to join the investment team. There are already many companies posted on Facebook's developer forums, 3, Adver

Let PHP show how Facebook's fans count

If your site or blog has an inline Facebook page, you might want to know how many fans you have. This code will help you check the number of Facebook fans, remember, and don't forget to add the code to the second line of your page ID. The code is as follows:

The design idea behind FACEBOOK paper new User Guide

In design, Paper is my personal favorite product, in addition to its innovative mobile App interaction and many surprising design details, the initial use of the magnetic female guide is also quite commendable. The article was to be shared with you after reading a speech on new user guidance in a small-scale technology-sharing session of the Paper team, posted on YouTube on April 18. Background: April 18, Facebook posted a video of the Paper team's s

FACEBOOK/ATC Environment Construction Summary

/hostapd.conf.configuration of ATC tools Reference articlesGitHubUse of the Web Environment Simulation tool ATC in Facebook ATC tool configuration is a lot easier than WiFi hotspot sharing, just follow GitHub. Start ATC sudo atcd--atcd-wan eth0--atcd-lan wlan0 start the ATC profile configuration Interface Python manage.py runserver 0.0.0.0:8000 link ATC profile Configuration Interface I've added a few profiles of

Facebook said Flash security vulnerabilities could damage its business

Facebook said Flash security vulnerabilities could damage its business Early in the year, Adobe Flash was found to have a serious security vulnerability. Hackers can take over anyone's computer and install malware. Chrome and Firefox subsequently disabled Adobe Flash. Now Facebook also says the problem hit their bottom line. In an ICP filing with u. S. regulators, F

Facebook launches powerful Android Image library fresco automatically frees memory image cache memory Benefits

automatically frees up memory! Facebook launches powerful Android Image library frescoFast and efficient display of images is extremely important for Android devices, but in the past few years we have faced a lot of problems in effectively storing images. The picture is too big, and the phone has only a small amount of memory, especially the Android device to partition the memory to each application. Therefore, too many pictures will always consume mo

Facebook releases a draft PHP Language Specification

PHP is one of the most widely used scripting languages. it has been used by tens of millions of websites, but it does not yet have a formal language specification. Facebook engineers and PHP core developer SaraGolemon announced a formal specification plan at the OSCON meeting held at the beginning of last month. the draft specification has been published on Github. Facebook's website is mainly based on the PHP language. in the past few years,

CEO of RedHat: Google and Facebook are not available without open source

The US tech blog BusinessInsider recently interviewed Jim whitehirst, CEO of RedHat, and said that open-source applications are almost everywhere today, and technology companies, banks, and stock exchanges are all using them. Without open source, Google and Facebook cannot survive. The following is an interview transcript: Q: How do you answer "What is Linux? A: Linux is the first model of user-driven innovation. It has created such a large scale and

Specific implementation of the facebook sharing function on the webpage

This article introduces the specific implementation of the facebook sharing function on the webpage. for detailed code, see this article. The code is as follows: Digress: directly jump to the share button on the facebook login page: Url: http://www.facebook.com/sharer.php? U = www.baidu.com t = 123213123 Here, the u parameter is the link you want to share. The t parameter is not clear yet.

Facebook sharing on the webpage _ PHP Tutorial

The facebook sharing function is implemented on the webpage. Copy the code as follows: spanspanstyleword-wrap: normal The code is as follows: Digress: directly jump to the share button on the facebook login page: Url: http://www.facebook.com/sharer.php? U = www.baidu.com t = 123213123 Here, the u parameter is the link you want to share. The t parameter is not clear yet.

Facebook experienced large-scale downtime and affected users worldwide

Facebook experienced large-scale downtime on Thursday, with the affected users covering the world. Facebook went down for about 40 minutes. Twitter users complained about Facebook's downtime on the social networking site. When a user logs on to the Facebook website, an error message is displayed, saying: "Sorry, something went wrong ...... We are trying to fix th

The impact of Facebook's PHP code on the environment

Facebook provided information related to the server size a month ago. they used about 30 thousand servers, and most servers run PHP code to generate users' social websites. Driven by climate change discussions in Copenhagen: how much carbon will these servers generate? If PHP code is replaced by other languages, SyntaxHighlighter. all () will be reduced () Facebook provided information related to the serve

Facebook Experience Design ingenuity

Feather QiPublic Number: 37-point 2-degree experience (Id:ali-ccoux)Banner production: Morning Reading Hall-small Shallow singWelcome to Morning Reading class, E-mail: [Email protected]The Internet era product competition is fierce, product excellence is not the same as technology leader. As Lo Zhenyu said, "The industrial era is loaded with specific functions, the Internet era is loaded with fun and emotion," as Steve Jobs said "We are at the intersection of technology and humanities", the func

5 profit suggestions of Facebook app

1. Tips: in fact, not just Facebook-based Apps, many web app creators want their products to sell for a good price (such as YouTube ), nor does it exclude the positioning of many web app creators for the profit model of their own products, that is, selling-it seems to have become a trend ~ 2. Develop: an indirect way to obtain funds is to attract a third party to join the investment team. Currently, many companies have posted cooperation intentions o

Yahoo !" Rushmore plans that Yahoo will integrate with Facebook on a large scale

Yahoo! "Rushmore" yahoo will be integrated with Facebook on a large scale The so-called "Rushmore plan" is the integration of Yahoo, a giant Internet portal and a large social network. Today, Yahoo announced that it will be fully integrated with Facebook, from Yahoo's news sites to Flickr and Yahoo Mail, yahoo: in the first half of the year, Yahoo users will be able to view the status of their

How to install Facebook pages using flash templates

Original article: how to install Facebook pages through Flash templatesProblem: You want to use flash templates to install Facebook pages Solution: Please refer to the detailed steps below Explanation: Register on www.facebook.com or log on to your account If you do not have a special page, you can create one on www.facebook.com/page/create.php. For details about how to create your application on

Facebook publishes C + + HTTP Framework Proxygen

Facebook announced the launch of the C + + HTTP Framework Proxygen, which included an HTTP server. Proxygen is oxygen homophonic, support SPDY/3 and spdy/3.1, the future will also support HTTP/2.Facebook engineers say Proxygen is not designing an alternative to the popular HTTP server Apache or Nginx, but is committed to building a high-performance C + + HTTP framework that is easy to integrate into existin

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