qcon sp 2016 - elixir: tolerância a falhas para adultos
TRANSCRIPT
ELIXIRTolerância a Falhas para Adultos
@akitaonrails
ELIXIRTolerância a Falhas para Adultos
@akitaonrails
@akitaonrails
FIM DA LEI DE
MOORE
THREADS! (NÃO USE)
THREADS! (NÃO USE)
EVENTOS! (NÃO USE)
EVENTOS! (NÃO USE)
BAIXA LATÊNCIA
CO-ROTINAS (SUBROTINAS, FIBRAS)
CASOS REAIS
“Since cut-over of the first nodes in British Telecom's network in January 2002 only one minor fault has occurred, resulting in 99.9999999% availability.”
“The network performance has been so reliable that there is almost a risk that our field engineers do not learn maintenance skills.”
Bernt Nilsson - director of Ericsson’s Next Generation Systems program
BÁSICO …
PEER-TO-PEER NETWORKING
[a,b,c]=[a,2,3]
{:ok,message}={:ok,“world"}
{:ok,[hello:message]}={:ok,[hello:“world”]}
[hello:message,world:message2]#=>[{:hello,message},{:world,message2}]
[a,b,c]=[a,2,3]
{:ok,message}={:ok,“world"}
{:ok,[hello:message]}={:ok,[hello:“world”]}
[hello:message,world:message2]#=>[{:hello,message},{:world,message2}]
[a,b,c]=[a,2,3]
{:ok,message}={:ok,“world"}
{:ok,[hello:message]}={:ok,[hello:“world”]}
[hello:message,world:message2]#=>[{:hello,message},{:world,message2}]
[a,b,c]=[a,2,3]
{:ok,message}={:ok,“world"}
{:ok,[hello:message]}={:ok,[hello:“world”]}
[hello:message,world:message2]#=>[{:hello,message},{:world,message2}]
PATTERN MATCHING
CALL BY PATTERN
Spawn, Send, Receive
"PID" (Process ID)
PROCESSOS (GREEN THREADS)
List/Kill
ASYNCHRONOUS EXCEPTIONS
ASYNCHRONOUS EXCEPTIONS
Link, Flag
ACTORS!
GenServer
[h,t]=[1,2,3]#=>h=1,t=[2,3]
Process.list|>Enum.reverse#=>Enum.reverse(Process.list())
[h,t]=[1,2,3]#=>h=1,t=[2,3]
Process.list|>Enum.reverse#=>Enum.reverse(Process.list())
SUPERVISOR TREE (supervisor - supervisees/workers)
OTP (Open Telecom Platform)
MICRO “YOCTO” SERVICES
(Micro > Nano > Pico > Femto > Atto > Zepto > Yocto)
MICRO “YOCTO” SERVICES
(Micro > Nano > Pico > Femto > Atto > Zepto > Yocto)
MICRO “YOCTO” SERVICES
(Micro > Nano > Pico > Femto > Atto > Zepto > Yocto)
• Keywords, Maps, Comprehensions
• Keywords, Maps, Comprehensions
• Documentação testável/executável
• Keywords, Maps, Comprehensions
• Documentação testável/executável
• TypeSpecs, Behaviors
• Keywords, Maps, Comprehensions
• Documentação testável/executável
• TypeSpecs, Behaviors
• Agents, Tasks, GenEvent
• Keywords, Maps, Comprehensions
• Documentação testável/executável
• TypeSpecs, Behaviors
• Agents, Tasks, GenEvent
• Macros, Sigils
• Keywords, Maps, Comprehensions
• Documentação testável/executável
• TypeSpecs, Behaviors
• Agents, Tasks, GenEvent
• Macros, Sigils
• Armazenamento: ETS, DETS, Mnesia
Javascript - shared mutable global stateBlocking Event Loop
Rust -Low Level Async in progress No coroutines
Go Suture (OTP Clone)
goroutines sem ID shared mutable statestatic signatures
Scala Akka (OTP Clone)
shared mutable statestatic signatures
Clojure Pulsar / Quasar Almost Erlang-like Process JVM limitations
“quase” …
Erlang: PRONTO! (30 anos)
APRENDENDO
