def check(self, byte_ndarray):
"""
check involves p and q
:param byte_ndarray: all ndarray including p and q
:return:
"""
# check p
data_p_ndarray = byte_ndarray[:-1]
utils.check_data_p(data_p_ndarray)
# check_q
data_ndarray = byte_ndarray[:-2]
q_ndarray = byte_ndarray[-1:]
utils.check_q(data_ndarray, q_ndarray)
def check(self, byte_ndarray):
"""
check involves p and q
:param byte_ndarray: all ndarray including p and q
:return:
"""
# check p
data_p_ndarray = byte_ndarray[:-1]
utils.check_data_p(data_p_ndarray)
# check_q
data_ndarray = byte_ndarray[:-2]
q_ndarray = byte_ndarray[-1:]
utils.check_q(data_ndarray, q_ndarray)
def recover_d_or_p(self, fname, index):
"""
recover data drive or 'p' drive, simply using XOR
:param fname: data name
:param index: data disk or p disk index
:return:
"""
assert 0 <= index < self.N - 1
byte_ndarray = self._read_n(fname, self.N - 1, exclude=index)
parity = utils.gen_p(byte_ndarray, ndim=1)
content = self._1darray_to_str(parity)
fpath = self.get_real_name(index, fname)
utils.write_content(fpath, content)
# check data or p
read_ndarray = self._read_n(fname, self.N - 1)
utils.check_data_p(read_ndarray)
def recover_d_or_p(self, fname, index):
"""
recover data drive or 'p' drive, simply using XOR
:param fname: data name
:param index: data disk or p disk index
:return:
"""
assert 0 <= index < self.N - 1
byte_ndarray = self._read_n(fname, self.N - 1, exclude=index)
parity = utils.gen_p(byte_ndarray, ndim=1)
content = self._1darray_to_str(parity)
fpath = self.get_real_name(index, fname)
utils.write_content(fpath, content)
# check data or p
read_ndarray = self._read_n(fname, self.N - 1)
utils.check_data_p(read_ndarray)
def check(self, byte_ndarray):
"""integrity check; only need to check p"""
utils.check_data_p(byte_ndarray)
