Using Redis sorted sets to build a scalable real-time web waiting list.
Using Redis sorted sets to build a scalable real-time web waiting list. Alex Cruikshank · January 17th, 2014 As websocket communication makes large real-time web experiences more common, we are increasingly faced with the problem of how to build apps that work just as well with many concurrent users as they do with a few. The problem touches both the technical limits of the server infrastructure a
GitHub - nyagato-00/predictor: Fast and efficient recommendations and predictions using Redis
Fast and efficient recommendations and predictions using Ruby & Redis. Developed by and used at Pathgather to generate course similarities and content recommendations to users. Originally forked and based on Recommendify by Paul Asmuth, so a huge thanks to him for his contributions to Recommendify. Predictor has been almost completely rewritten to Be much, much more performant and efficient by usi
Linux bridge: MAC addresses and dynamic ports « \1
Scenario: KVM virtualization host running several bridged guests. The host has a bridge interface br0 that starts out containing only eth0, and other interfaces are dynamically added and removed from the bridge as guests are started and stopped. The problem is, the host seems to randomly suffer some loss of connectivity (from a few to 30-40 seconds) when some guest is started or stopped. Initially
AWS VPN (1) between VPC VPN G/W and Debian Linux (racoon, setkey, quagga) with NAT | 外é“父ã®åŒ
AWS VPN (1) between VPC VPN G/W and Debian Linux (racoon, setkey, quagga) with NAT AWSã®VPCã«ã¯VPN機能ãŒã¤ã„ã¦ã„ã‚‹ã®ã§ã€åˆ©ç”¨ã™ã‚‹ã¨ç¤¾å†…ãªã©ä»»æ„ã®ã‚µãƒ–ãƒãƒƒãƒˆã¨VPCã®é–“ã‚’ã€Privateアドレスã§æš—å·åŒ–通信ã§ãるよã†ã«ãªã‚Šã¾ã™ã€‚ 通常ã“ã®VPC VPNã¯ã€ãƒãƒ¼ãƒ‰ã‚¦ã‚§ã‚¢ãƒ«ãƒ¼ã‚¿ãƒ¼ã‚’用ã„ã¦æŽ¥ç¶šã™ã‚‹ã¹ãã€ä¸€èˆ¬çš„ãªãƒ«ãƒ¼ã‚¿ã®è¨å®šãƒ•ã‚¡ã‚¤ãƒ«ã‚’é…布ã—ã¦ãれる至れり尽ãã›ã‚Šãªç’°å¢ƒãªã®ã§ã™ãŒã€ã‚¦ãƒã¯è²§ä¹ã§LinuxãŒå¤§å¥½ããªã®ã§ã€ Debian Wheezyã§æŽ¥ç¶šã‚’試ã¿ã‚‹ã®ã§ã—ãŸã€‚ ï¼’ã¤ã®æ–¹æ³• Linuxã§ã¯ç§ãŒæœ€åˆã«æ§‹æƒ³ã—ãŸã€ç¶ºéº—ã§å®Œå…¨ãªå†—長化構æˆã¯ã§ããªã„ã“ã¨ãŒã‚ã‹ã‚Šã€å¦¥å”案ã¨ã—ã¦ï¼’ã¤ã®æ§‹æˆæ¡ˆãŒã§ããŸãŸã‚ã€ï¼’ã¤ã®ã‚¨ãƒ³ãƒˆãƒªã«åˆ†ã‘ã¦æ›¸ãã“ã¨ã«ã—ã¾ã™ã€‚ãã®ï¼’ã¤ã®æ¡ˆã¨ã¯ã€ 綺麗ãªå†—長化＋NAT æ³¥è‡ã„冗長化＋éžNAT ã§ã€ã¾ãš
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