Ruby 셀룰로이드 및 리소스 사용량

Question

저는 Celluloid를 처음 사용하고 풀 및 선물에 대해 몇 가지 질문이 있습니다. 간단한 웹 크롤러를 만들고 있습니다 (하단의 예 참조). 내 URLS는 수십 개의 URL을 배열하므로 예제는 수백 개로 줄었습니다.

내가 지금하고 싶은 것은 최대로 그룹화하는 것입니다. 선물을 사용하는 50 req/s는 콜백을 얻고 추가 ​​50 개의 URL 등을 크롤링합니다.이 코드로 인해 발생하는 문제는 최대 50 개의 스레드가 될 것이라고 예상했지만 내 경우에는 400 개 이상을 생성합니다. 입력 데이터가 증가하면 코드 스 니펫이 추가 요청을 생성 할 수 없기 때문에 완료됩니다 (OS 제한, OSX).

왜 이렇게 많은 스레드가 생성되며이를 방지하는 방법은 무엇입니까? OS가 제공하는 모든 리소스를 사용하는 빠른 크롤러가 필요하지만 이보다 더 많지는 않습니다. :) 2.000 스레드가 OSX에서 한계가되는 것 같습니다.이 값을 초과하면 코드가 충돌합니다.

#!/usr/bin/env jruby 

require 'celluloid' 
require 'open-uri' 

URLS = 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

class Crawler 
    include Celluloid 

    def fetch(id) 
    uri = URI("http://api.instagram.com/oembed?url=#{id}") 
    req = open(uri).read 
    end 
end 

URLS.each_slice(50).map do |idset| 
    pool = Crawler.pool(size: 50) 
    crawlers = idset.to_a.map do |id| 
    begin 
     pool.future(:fetch, id) 
    rescue 
     nil 
    end 
    end 
    crawlers.compact.each do |resp| 
    puts resp.value.size rescue nil 
    end 
end 

Answer 1

클래스를 분할합니다. 위키에서는 그 안에 작업자를 모으지 않는다고 들었습니다.

https://github.com/celluloid/celluloid/wiki/Pools

잡았다 : 노동자 내부의 풀을하지 마십시오!

MyWorker 내에서 MyWorker.pool을 사용하면 작업자 스레드가 무제한으로 확대됩니다 ( ).

---

업데이트

당신은 항상 내가 추측 같은 스레드를 사용하므로 바로 each_slice 블록 외부로 만드는 풀을 제한하려면

.

pool = Crawler.pool(size: 50)  
URLS.each_slice(50).map do |idset| 
    crawlers = idset.to_a.map do |id| 
    begin 
     pool.future(:fetch, id) 
    rescue 
     nil 
    end 
    end 
# ... 

Answer 2

슬라이스 50 개를 반복 할 때마다 pool 관리자를 참조 해제하는 pool 값이 재설정됩니다. 액터는 역 참조로 쓰레기 수집을하지 않으므로 (#terminate를 호출해야합니다) 아마 오래된 풀을 쌓고있을 것입니다. 은이어야합니다. 하나의 풀을 만들어 한 번에 모든 미래를 만듭니다 (미래의 개체 자체가 작을 경우 반환 값을 작게 유지하는 경우). 슬라이스해야 할 경우, each_slice 외부에서 풀을 인스턴스화하면 매번 새로운 풀을 만들지 않고 동일한 풀을 계속 사용합니다. 다른 이유로 인해 매번 새로운 풀을 얻고 싶다면 역 참조하기 전에 풀에서 종료를 호출하십시오. 또한 풀이되었을 때 풀 작업자가 종료되지 않는 문제를 수정하여 0.12.0 이상으로 셀룰로이드로 작업하고 있는지 확인하십시오. 내가 할 곳

logger.info "Actors left: #{Celluloid::Actor.all.to_set.length} Alive: #{Celluloid::Actor.all.to_set.reject { |a| a.nil? || !a.alive? }.length}"