覃超 1 Self introduction 2 Facebook & Messenger status 3 Evolution of Messenger architecture 4 Whatsapp?? Agenda Today - Facebook phone -> Facebook Home Android - Facebook Messenger app (Growth) - 2007: Tongji University 2015 – Now: FreeSTech partner 2010 – 2014 Facebook (Growth) Self introduction A brief overview of Facebook Messenger Messenger 0.0 Messenger 1.0 系统难点 1. 信息传输的时效性 2.‘在线状态’跟踪 ‘在线状态’跟踪 3. Queue（消息队列）+ 送达机制 4. 多并发连接 5. 消息的历史记录 1.0 Architecture Messenger 2.0 The New Facebook Messages Emails Chats SMS Messages 技术微调 ▪ HBase - Small messages - Message metadata (thread/message

TVM at Facebook Lots of contributors at FB and elsewhere- Performance matters a lot - Heterogenous computing environment - High variety of workloads - Ever-increasing set of primitives (over 500

paper describing the model can be found here. NVIDIA’s Mask R-CNN model is an optimized version of Facebook’s implementation, which leverages mixed precision arithmetic by using Tensor Cores on NVIDIA V100 paper describing the model can be found here. NVIDIA’s Mask R-CNN model is an optimized version of Facebook’s implementation, which leverages mixed precision arithmetic by using Tensor Cores on NVIDIA V100 paper describing the model can be found here. NVIDIA’s Mask R-CNN model is an optimized version of Facebook’s implementation, which leverages mixed precision arithmetic by using Tensor Cores on NVIDIA V100

authorization protocols for a number of the most popular sites on the web, including Google/Gmail, Facebook, Twitter, and FriendFeed. The module includes methods to log users in via these sites and, where More details at http://haacked.com/archive/2009/06/25/json-hijacking.aspx/ and https://github.com/facebook/tornado/issues/1009 RequestHandler.flush(include_footers=False, callback=None) Flushes the current friendfeed_consumer_key, friendfeed_consumer_secret, google_consumer_key, google_consumer_secret, facebook_api_key, facebook_secret: Used in the tornado.auth module to authenticate to various APIs. Template settings:

authorization protocols for a number of the most popular sites on the web, including Google/Gmail, Facebook, Twitter, and FriendFeed. The module includes methods to log users in via these sites and, where More details at http://haacked.com/archive/2009/06/25/json-hijacking.aspx/ and https://github.com/facebook/tornado/issues/1009 RequestHandler.flush(include_footers: bool = False) → Future[None][source] friendfeed_consumer_key, friendfeed_consumer_secret, google_consumer_key, google_consumer_secret, facebook_api_key, facebook_secret: Used in the tornado.auth module to authenticate to various APIs. Template settings:

authorization protocols for a number of the most popular sites on the web, including Google/Gmail, Facebook, Twitter, and FriendFeed. The module includes methods to log users in via these sites and, where More details at http://haacked.com/archive/2009/06/25/json-hijacking.aspx/ and https://github.com/facebook/tornado/issues/1009 RequestHandler.flush(include_footers=False, callback=None) Flushes the current friendfeed_consumer_key, friendfeed_consumer_secret, google_consumer_key, google_consumer_secret, facebook_api_key, facebook_secret: Used in the tornado.auth module to authenticate to various APIs. Template settings:

authorization protocols for a number of the most popular sites on the web, including Google/Gmail, Facebook, Twitter, and FriendFeed. The module includes methods to log users in via these sites and, where More details at http://haacked.com/archive/2009/06/25/json-hijacking.aspx/ and https://github.com/facebook/tornado/issues/1009 42 Chapter 6. Documentation Tornado Documentation, Release 6.1 RequestHandler friendfeed_consumer_key, friendfeed_consumer_secret, google_consumer_key, google_consumer_secret, facebook_api_key, facebook_secret: Used in the tornado.auth module to authenticate to various APIs. Template settings:

authorization protocols for a number of the most popular sites on the web, including Google/Gmail, Facebook, Twitter, and FriendFeed. The module includes methods to log users in via these sites and, where More details at http://haacked.com/archive/2009/06/25/json-hijacking.aspx/ and https://github.com/facebook/tornado/issues/1009 RequestHandler.flush(include_footers=False, callback=None) Flushes the current friendfeed_consumer_key, friendfeed_consumer_secret, google_consumer_key, google_consumer_secret, facebook_api_key, facebook_secret: Used in the tornado.auth module to authenticate to various APIs. Template settings:

authorization protocols for a number of the most popular sites on the web, including Google/Gmail, Facebook, Twitter, and FriendFeed. The module includes methods to log users in via these sites and, where More details at http://haacked.com/archive/2009/06/25/json-hijacking.aspx/ and https://github.com/facebook/tornado/issues/1009 RequestHandler.flush(include_footers=False, callback=None) Flushes the current friendfeed_consumer_key, friendfeed_consumer_secret, google_consumer_key, google_consumer_secret, facebook_api_key, facebook_secret: Used in the tornado.auth module to authenticate to various APIs. Template settings:

authorization protocols for a number of the most pop- ular sites on the web, including Google/Gmail, Facebook, Twitter, and FriendFeed. The module includes methods to log users in via these sites and, where More details at http://haacked.com/archive/2009/06/25/json-hijacking.aspx/ and https://github.com/facebook/tornado/issues/1009 RequestHandler.flush(include_footers: bool = False) → Future[None] Flushes friendfeed_consumer_key, friendfeed_consumer_secret, google_consumer_key, google_consumer_secret, facebook_api_key, facebook_secret: Used in the tornado.auth module to authenticate to various APIs. Template settings: