python使用多线程备份数据库的步骤

from concurrent.futures import ThreadPoolExecutor
import time
 
def test_thread(sec):
    time.sleep(sec)
    print(f"sleep {sec} done")
    return sec
 
with ThreadPoolExecutor(max_workers=4) as t:  # 创建一个最大容纳数量为4的线程池
    task1 = t.submit(test_thread, 1)
    task2 = t.submit(test_thread, 2)  # 通过submit提交执行的函数到线程池中
    task3 = t.submit(test_thread, 3)
 
    print(f"task1: {task1.done()}")  # 通过done来判断线程是否完成
    print(f"task2: {task2.done()}")
    print(f"task3: {task3.done()}")
 
    time.sleep(2.5)
    print(f"task1: {task1.done()}")
    print(f"task2: {task2.done()}")
    print(f"task3: {task3.done()}")
    print(task1.result())  # 通过result来获取返回值

task1: False
task2: False
task3: False
sleep 1 done
sleep 2 done
task1: True
task2: True
task3: False
1
sleep 3 done

import time
from concurrent.futures import ThreadPoolExecutor
 
def spider(page):
    time.sleep(page)
    return page
 
start = time.time()
executor = ThreadPoolExecutor(max_workers=4)
 
i = 1
for result in executor.map(spider, [2, 3, 1, 4]):
    print("task{}:{}".format(i, result))
    i += 1

task1:2
task2:3
task3:1
task4:4

#!/bin/bash
backup_path="/data/backup/"
myuser="root"
mypwd="123456"
db_name="test_1000"
current_time=$(date +%Y%m%d%H%M%S)
for i in $(seq 4);do
    /usr/local/mysql/bin/mysqldump -u${myuser} -p${mypwd} --single-transaction --master-data=2 --set-gtid-purged=off "${db_name}${i}" | gzip > ${backup_path}/"${db_name}${i}"_${current_t
ime}.sql.gz
done

mysqldump: [Warning] Using a password on the command line interface can be insecure.
mysqldump: [Warning] Using a password on the command line interface can be insecure.
mysqldump: [Warning] Using a password on the command line interface can be insecure.
mysqldump: [Warning] Using a password on the command line interface can be insecure.
 
real    4m28.421s
user    3m50.360s
sys     0m5.962s