学以致用,python多线程备份数据库并删除旧的备份。

 1 #!/usr/bin/python
 2 # -*- coding=utf-8 -*-
 3 import time
 4 import os
 5 import datetime
 6 import threading
 7 from time import ctime,sleep
 8 
 9 date=time.strftime(‘%Y-%m-%d‘,time.localtime(time.time()))
10 dbname=(‘test‘,‘test2‘) #定义元组必须要有多个，要不则循环里面的字符。
11 dbname2=(‘test3‘,‘test4‘)
12 bkdir="/backup/mysqlbk/"
13 
14 #删除超过3天的备份文件
15 now_time = datetime.datetime.now()
16 yes_time = now_time + datetime.timedelta(days=-3)
17 out_time = yes_time.strftime(‘%Y-%m-%d‘)
18 
19 
20 
21 
22 def dumpsql():
23     for i in dbname:
24         os.system("/usr/local/mysql/bin/mysqldump -u%s %s | gzip > %s%s" % ("root",i,bkdir,date+"."+i+".sql.gz"))
25 
26 def dumpsql2():
27     for i in dbname2:
28         os.system("/usr/local/mysql/bin/mysqldump -u%s %s | gzip > %s%s" % ("root",i,bkdir,date+"."+i+".sql.gz"))
29 
30 
31 def outbk():
32     for i in dbname:
33         if os.path.exists(bkdir+out_time+‘.‘+i+‘.sql.gz‘):
34             os.remove(bkdir+out_time+‘.‘+i+‘.sql.gz‘)
35 
36 #双线程
37 threads=[]
38 t1 = threading.Thread(target=dumpsql)
39 threads.append(t1)
40 t2 = threading.Thread(target=dumpsql2)
41 threads.append(t2)
42 
43 if __name__ == "__main__":
44     outbk()
45     for t in threads:
46         t.setDaemon(True)   #启动多线程
47         t.start()
48     t.join()
49     print ("all over %s" %ctime())