World of Tanks Linux and Open Source Inside Maksim Melnikau I'm I developer in Wargaming (Belarus, Minsk) I Order of War I Order of War: Challenge I World of Tanks I Linux Mobile hobbyist I Openmoko I systemd I telepathy I Gentoo World of Tanks: Linux and Open Source Inside, Maksim Melnikau World of Tanks I mmorpg I fps about tanks I 15x15 pvp World of Tanks: Linux and Open Source Inside, Maksim Melnikau World of Tanks Today I 800k concurrent users in peak I 8M messages per second I 500 servers for game and web I 60M game portal visits per month I 5 PB (petabytes) for game installs and updates per month World of Tanks: Linux and Open Source Inside, Maksim Melnikau Cheaters I many players want to cheat I cheaters make other players unhappy I cheaters xenophobia World of Tanks: Linux and Open Source Inside, Maksim Melnikau Scaleability I better product | more users I more users | more servers I more servers | bigger synchronization problem World of Tanks: Linux and Open Source Inside, Maksim Melnikau Single Datacenter Issues I latency I availability I single point of failure World of Tanks: Linux and Open Source Inside, Maksim Melnikau Big Data I more users | more data I more data | bigger disks I suddenly, new storage solution required World of Tanks: Linux and Open Source Inside, Maksim Melnikau Rapid Growth I simple solution | faster time to market I great success | simple solutions completely unusable I rewriting everything on-the-fly I business changes every day World of Tanks: Linux and Open Source Inside, Maksim Melnikau Nobody Will Help You I no time to educate people I no time to wait 3rd party support I no time to write good proper solutions World of Tanks: Linux and Open Source Inside, Maksim Melnikau Full Control I software I data I team I hardware World of Tanks: Linux and Open Source Inside, Maksim Melnikau Linux and Open Source Software I ready to use components I good documentation I customize software when required I hire people with required skills World of Tanks: Linux and Open Source Inside, Maksim Melnikau World of Tanks Architecture I game client | thin client, player I server | world simulation I cluster | thousands of process working as one server I step-game world, with very small steps World of Tanks: Linux and Open Source Inside, Maksim Melnikau Development I regular Python I GC disabled I some parts rewritten on C++ I message-based RPC I UDP-based reliable internal protocol World of Tanks: Linux and Open Source Inside, Maksim Melnikau Cluster World of Tanks: Linux and Open Source Inside, Maksim Melnikau Multi Cluster I scaleability I geo distributed I availability I independence World of Tanks: Linux and Open Source Inside, Maksim Melnikau Production 1. 500 servers 2. 8k cpu cores 3. 32 TB RAM 4. Linux World of Tanks: Linux and Open Source Inside, Maksim Melnikau MySQL I database size: 300 GB I 384 GB RAM I Percona 5.5 (buffer pool warming | 1GBps) I 40k selects, 1k inserts, 1k updates per second I 24 HDD ∗ 600 GB ∗ 0.5 = 6 TB World of Tanks: Linux and Open Source Inside, Maksim Melnikau Client 1. regular Python 2. HUD - ActionScript, Scaleform 3. 3D graphics - C++ World of Tanks: Linux and Open Source Inside, Maksim Melnikau Web Tasks I registrations I update distribution I news I account management I docs I account profile I media I statistics I payment form I ratings I receiving payments I ... World of Tanks: Linux and Open Source Inside, Maksim Melnikau LNAMPMR World of Tanks: Linux and Open Source Inside, Maksim Melnikau Other World of Tanks: Linux and Open Source Inside, Maksim Melnikau Keys to Success I Linux on server I relaying on Open Source I fast and easy development I having full control on everything I don't afraid of different software stacks World of Tanks: Linux and Open Source Inside, Maksim Melnikau Thank You. Questions Maksim Melnikau mailto:[email protected] https://plus.google.com/114669104565190507739/ https://twitter.com/max_posedon http://wargaming.com.