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Technical InputHow modern portal should looks like ?
● Active Fast Comet Pages ● High-load Ready ● Reliability and Failover ● Ditribution for Speed ● Monitoring tools● Facebook-like facilities and integration● Simple and small time-to-market● Single Environment
Underlying ProductsQuick and Well strategy
Riak● High Availability ● Monitoring Tools● Best In-class● Stable● Manageable
RabbitMQ● Connecting People● Deliver Messages● Invented in Banks● Language Opaque● Fast
GProc● Distributed In-
memory database● Consistent● Complex Queries
Erlang● Automatic Fail-over● Purity of code● High Reliability● High Load● Mature Infrastructure
Cowboy● Fastest Web Server● SSL Ready● Modular● Young but stable
Nitrogen● Best Comet Server● Clustered● Typed HTML● Rich JavaScript● Easy to Develop● Event driven
Social Web ApplicationSimple but modern
● Users and Groups● Free to register● Direct Messages
● Friends● Likes● Feeds
● Media Files as Attachments, Music, Video● Drop-down Auto-completion● Comet Pages with Rich JavaScript● Pub/Sub key-routing with RabbitMQ
Game Server NodesEasy to Write new games
● AMF listeners and Flex Clients● Tables, Games, Tournaments model● Access to Riak and GProc databases
● Matching Players Each Other in ranges● Global Registry of all games in Cluster● Persist Game Data● 40KB per game on server-side
Sequential ConsistencyGuard Processes
● All entities that could be changed controlled by Erlang Process spawn on bootstrap
● Respawn on failover on another node
● Back-end Workers for ordering write requests in RabbitMQ queues
● All read operations still available for anyone in cluster
● Examples: Feeds, Users, Groups, Lists
Cluster LevelsDiferrent Tasks Require Different Clusters
Database● Riak is present in
each node in cluster
Memory● Each Process
registered in global database
Routing● Clustered RabbitMQ
to handle routing
Filesystem● GlusterFS on each
server
Cluster Line Erlang/OTP Releases per OS
app@srv1● Workers● Riak R/W● GProc
game@srv1● Games● Riak R/O● GProc
web@srv1● Nitrogen● Riak R/O● Gproc● Cowboy
rabbit@srv1● RabbitMQ● Routing Databse
Three Production LinesContinue running after single server down
SRV1● app@srv1 node
● game@srv1 node
● web@srv1 node
● rabbit@srv1 node
● SNMP Agent / node
● Riak Control / node
● 8x Xeon 3GHz
● 30GB RAM
● 512GB SSD
● 3TB RAID
SRV2● app@srv2 node
● game@srv2 node
● web@srv2 node
● rabbit@srv2 node
● SNMP Agent / node
● Riak Control / node
● 8x Xeon 3GHz
● 30GB RAM
● 512GB SSD
● 3TB RAID
SRV3● app@srv3 node
● game@srv3 node
● web@srv3 node
● rabbit@srv3 node
● SNMP Agent / node
● Riak Control / node
● 8x Xeon 3GHz
● 30GB RAM
● 512GB SSD
● 3TB RAID
