scrapy redis
master slave
masterslave
6. Masterredis-server:
redis-server
7. Slave:
scrapy runspider youyuan.py
8. Masterredis-clipushstart_urls
redis-cli> lpush youyuan:start_urls http://www.youyuan.com/find/beijing/mm18-25/advance-0-0-0-0-0-0-0/p1/
push redis push 5slave 5Previous: The problem of python crawler
After thinking about it for a long time, I really can t understand how locks are used in listing 6-9. Locks are only set with a key, and are not used at all (such as if getkey () = = true and so on). The generated locks are still random, that is, the co...
how do you understand that python uses for in to subscribe to messages? I used to work on the front end, and event subscriptions are written in this way, which is easy to understand. eventBus.on( close , function(e){ console.log(e) }) recently, I...
problem description when I use python3 s redis for caching, the structure is hset, but when the data reaches 10000, I need to store these 10000 pieces of data into the database. When I delete the hset, of redis, the new request is not added to the re...
after the scrapy-redis distributed crawler starts, can it run scrapy runspdier xx.py on a new machine to add slaves while it is crawling? Will you crawl the same url? A running project has configured scrapy-redis-related settings (REDIS_HOST, etc.) in...
requirements: I need to use python to get the list type data of redis; add a column of additional data on the basis of the original data; how to achieve it? for example: original list data: {"@version":"1","@timestamp"...
key_name = test_h redis.expire(key_name, -1) redis.execute() This key is destroyed directly in redis. Why? ...
if len(response) != len(commands): self.connection.disconnect() raise ResponseError("Wrong number of response items from " "pipeline execution") under what...