Python-100-Days/Day66-75/74.Scrapy分布式实现.md

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## Scrapy爬虫框架分布式实现
### 分布式爬虫原理
### Scrapy分布式实现
1. 安装Scrapy-Redis。
2. 配置Redis服务器。
3. 修改配置文件。
- SCHEDULER = 'scrapy_redis.scheduler.Scheduler'
- DUPEFILTER_CLASS = 'scrapy_redis.dupefilter.RFPDupeFilter'
- REDIS_HOST = '1.2.3.4'
- REDIS_PORT = 6379
- REDIS_PASSWORD = '1qaz2wsx'
- SCHEDULER_QUEUE_CLASS = 'scrapy_redis.queue.FifoQueue'
- SCHEDULER_PERSIST = True通过持久化支持接续爬取
- SCHEDULER_FLUSH_ON_START = True每次启动时重新爬取
### Scrapyd分布式部署
1. 安装Scrapyd
2. 修改配置文件
- mkdir /etc/scrapyd
- vim /etc/scrapyd/scrapyd.conf
3. 安装Scrapyd-Client
- 将项目打包成Egg文件。
- 将打包的Egg文件通过addversion.json接口部署到Scrapyd上。