Crawler ip pool: distributed crawler ip pool tutorial

Hands-on teaching you to build a resistant crawler pool with proxy IPs

Crawlers know that IP blocking is as common as choking on a meal. A single crawler with its own IP hard just? The site will be blacklisted in a few minutes. Today we will talk about how to use proxy IP to build adistributed crawler pool, allowing you to collect data steady as an old dog.

First, understand why distributed

For example, you send 10 people to the supermarket to buy salt (don't ask why), and each person has a different membership card (proxy IP). Even if a cashier (anti-crawler system) remembers a certain card, others can still buy. Distributed crawler is the formula, multiple machines + different IP work in turn, much more efficient than single-handedly.

Here's the point:dynamic IPYou have to choose the one that can switch automatically.static IPIdeal for scenarios that require a fixed identity. Like our ipipgo's residential proxy, both dynamic packages and enterprise-level programs, the measured switching success rate can reach 98% up.

Second, build a four-step, white can also understand

1. Select the agent type:
Dynamic homes are suitable for general collection (price-friendly), enterprise-level dynamic anti-blocking is stronger, and static IPs are recommended for scenarios that require logging in.

2. Engage machine resources:
Don't be silly to buy your own server, directly on the cloud service to open 5-10 machines billed by volume. Pay attention to geographical dispersion, don't choose all the Beijing server room.

3. Configure the agent pool:
Here's a Python example (remember to install redis):

import redis
from ipipgo_client import IPPool use your own SDK

pool = redis.Redis()
ip_client = IPPool(api_key="your key")

def get_ip().
    ip = ip_client.get_random_ip()
    pool.rpush("ip_queue", ip) Stuff the queue with IPs.

4. Scheduling Strategies:
Recommendedweights pollingIf the IP is quick to respond, it will be assigned more tasks. Encounter IP that returns 403, automatically throw back to the pool to re-verify.

Third, there are ways to maintain, don't be a shirker

1. Check the IP survival rate every day, below 80% quickly change packages
2. Setting the intelligent switching threshold to deactivate a single IP after 3 failures
3. Different IP pools for different services, do not let the collection tasks affect each other
4. Weekly usage report to see which website blocks the most IP addresses.

I have to brag here about ipipgo'sFailure automatic replacementFunction, the actual test can save 30% maintenance time. Their TK line has a miraculous effect on some special platforms, specific experience.

IV. QA session (a must for newbies)

Q: What should I do if I keep encountering CAPTCHA?
A: 1. lower request frequency 2. change static residential IP 3. with coding platforms

Q: Why do you recommend ipipgo?
A: His family hasCarrier-grade resource poolsThe last time I had a promotion to monitor, I used the enterprise version of the dynamic package to run for 72 hours without dropping the chain.

Q: How do I choose on a budget?
A: Buy the standard dynamic package first and remember to turn on theIP Multiplexing Mode. ipipgo's traffic billing is pretty flexible, use as much as you want.

Finally nagging sentence: do not try to cheap with free proxy, light is not allowed to data, heavy is the reverse traceability. Now on the market reliable proxy service, the cost price have to be 5 dollars / GB up, those who sell 1 dollar ... ... you guess what they rely on to make money?