python多线程备份SQL Server事务日志

python连接SQL Server需要pymssql，安装pymssql参考https://mp.csdn.net/postedit/81283149

#--*-- coding:utf-8 --*--
# 备份SQL Server事务日志，每小时一次

import os,time,logging
import pymssql
import threading
from datetime import datetime


logpath='D:\\scripts\\backup\\logs\\'
# 日志目录是否存在
isExists = os.path.exists(logpath)
if not isExists:
    os.makedirs(logpath)
# 日志信息
logging.basicConfig(level=logging.INFO,
                    format='%(asctime)s: %(levelname)-4s %(message)s',
                    filename=logpath + 'backup_log_' + time.strftime('%Y%m%d_%H%M%S', time.localtime()) + '.log',
                    filemode='w',
                    datefmt='%Y%m%d %X')

class MSSQL:

    def __init__(self,host,user,pwd,db):
        self.host = host
        self.user = user
        self.pwd = pwd
        self.db = db

    def __GetConnect(self):
        # 创建连接
        if not self.db:
            raise(NameError,"Not set db info")
        self.conn = pymssql.connect(host=self.host,user=self.user,password=self.pwd,database=self.db,charset="utf8")
        cur = self.conn.cursor()
        if not cur:
            raise(NameError,"Connect db Failed!")
        else:
            return cur

    def ExecQuery(self,sql):
        # 执行查询语句
        cur = self.__GetConnect()
        cur.execute(sql)
        resList = cur.fetchall()

        self.conn.close()
        return resList

    def ExecNonQuery(self,sql):
        # 执行非查询语句

        cur = self.__GetConnect()
        try:
            self.conn.autocommit(True)
            cur.execute(sql)
            self.conn.autocommit(False)
        except Exception as e:
            logging.info(e)
        self.conn.close()


def delbak(path):
    p = list(os.listdir(path))
    #logging.info("Delete >35 days backup file %s" % path)
    for i in range(len(p)):
        filedate = os.path.getmtime(path + p[i])
        currdate = time.time()
        num = (currdate - filedate) / (60 * 60 * 24)
        if num > 90:
            try:
                os.remove(path + p[i])
                #logging.info(u"Delete %s" % p[i])
            except Exception as e:
                logging.info(e)

class MyThread(threading.Thread):
    def __init__(self,func,args,name=''):
        threading.Thread.__init__(self)
        self.name=name
        self.func=func
        self.args=args
    def run(self):
        apply(self.func,self.args)

def baklog(ip,unuse):

    stip='\\\\10.110.0.1'
    ms = MSSQL(host=ip,user="dumper",pwd="123456",db="master")
    # 只备份所有业务数据库
    dblist = ms.ExecQuery("SELECT name FROM Master..SysDatabases Where dbid > 6")

    delpath = stip + '\\dbbackup\\' + ip + '\\'
    # 逐个库进行备份
    for db in dblist:
        # 备份的数据库名
        dbname = db[0]
        logging.info('Backup ' + ip + ' ' + dbname)
        ti = time.strftime('%Y%m%d_%H%M%S', time.localtime())
        # 指定备份目录
        path = delpath  + dbname + "\\" 
        # 全量/差异备份标识
        flag = 1
        isExists = os.path.exists(path)
        if not isExists:
            os.makedirs(path)
            flag = 0
        # 备份文件名
        fname = path + dbname + "_" + str(ti)
        if flag == 0:
            fname = path + dbname + "_" + str(ti) + "_full.bak"
            sql = "backup database [" + dbname + "] to disk='" + fname + "' with checksum,compression"
        else:
            path = path + "log\\"
            isExists = os.path.exists(path)
            if not isExists:
                os.makedirs(path)
            fname = path + dbname + "_" + str(ti) + "_log.bak"
            sql = "backup log [" + dbname + "] to disk='" + fname + "' with checksum,compression"

        # 执行备份
        ms.ExecNonQuery(sql)
        # 删除超过90天的备份文件(事务日志)
        delbak(path)

def main():
    # 所有需要备份的数据库IP
    pre = '10.'
    iplist = ('100.10.11','100.10.12','100.10.13','100.10.14','100.10.15','100.10.16','100.10.17','100.10.18','100.10.19',
              '100.10.220','100.10.200','100.10.180','100.10.181','100.65.150','100.65.151',
              '100.65.190','100.66.19','100.66.59',
              '11.12.81','11.12.11',
             )

    threads = []
    num = len(iplist)
    for i in iplist:
        ip = pre + i
        t = MyThread(baklog,(ip,0),baklog.__name__)
        threads.append(t)

    for i in xrange(num):
        threads[i].start() 
    for i in xrange(num):
        threads[i].join()
    logging.info(num)

if __name__ == '__main__':
    main()