from time import strftime
import os
import tarfile
import hashlib
import pickle
def check_md5(fname):
m=hashlib.md5()
with open(fname,'rb') as f1:
while 1:
data=f1.read(4096)
if not data:
break
m.update(data)
return m.hexdigest()
def full_backup(src,dst,md5file):
# 拼接出备份文件的绝对路径
fname=os.path.basename(src)
fname='%s_full_%s.tar.gz' % (fname,strftime('%Y%m%d'))
fname=os.path.join(dst,fname)
#压缩文件
tar=tarfile.open(fname,'w:gz')
tar.add(src)
tar.close()
md5dict={}
for path,folders,files in os.walk(src):
for file in files:
key=os.path.join(path,file)
md5dict[key] = check_md5(key)
#将字典键值存入文件中
with open(md5file,'wb') as f1:
pickle.dump(md5dict,f1)
def inc_backup(src,dst,md5file):
# 拼接出备份文件的绝对路径
fname = os.path.basename(src)
fname = '%s_inc_%s.tar.gz' % (fname, strftime('%Y%m%d'))
fname = os.path.join(dst, fname)
md5dict = {}
for path, folders, files in os.walk(src):
for file in files:
key = os.path.join(path, file)
md5dict[key] = check_md5(key)
#取出前一天的md5值,然后对比
with open(md5file,'rb') as f1:
old_md5=pickle.load(f1)
tar=tarfile.open(fname,'w:gz')
for key in md5dict:
if old_md5.get(key) !=md5dict[key]:
tar.add(key)
tar.close()
with open(md5file,'wb') as f1:
pickle.dump(md5dict,f1)
if __name__ == '__main__':
src= '/tmp/abc/security'
dst='/tmp/abc/backup'
md5file='/tmp/abc/md5.data'
if strftime('%a') == 'Mon':
full_backup(src,dst,md5file)
else:
inc_backup(src,dst,md5file)
python-定时完全备份及增量备份
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转载自blog.csdn.net/weixin_45942735/article/details/104154639
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