def time_decode(self, num_data, num_parity, ec_type, hd, file_size,
iterations):
"""
:return 2-tuple, (success, average decode time)
"""
timer = Timer()
tsum = 0
handle = pyeclib_c.init(num_data, num_parity, ec_type, hd)
whole_file_bytes = self.get_tmp_file(file_size).read()
success = True
fragments = pyeclib_c.encode(handle, whole_file_bytes)
orig_fragments = fragments[:]
for i in range(iterations):
missing_idxs = []
num_missing = hd - 1
for j in range(num_missing):
num_frags_left = len(fragments)
idx = random.randint(0, num_frags_left - 1)
fragments.pop(idx)
timer.start()
decoded_file_bytes = pyeclib_c.decode(handle, fragments,
len(fragments[0]))
tsum += timer.stop_and_return()
fragments = orig_fragments[:]
if whole_file_bytes != decoded_file_bytes:
success = False
return success, tsum / iterations
def time_decode(self,
num_data, num_parity, ec_type, hd,
file_size, iterations):
"""
:return 2-tuple, (success, average decode time)
"""
timer = Timer()
tsum = 0
handle = pyeclib_c.init(num_data, num_parity, ec_type, hd)
whole_file_bytes = self.get_tmp_file(file_size).read()
success = True
fragments = pyeclib_c.encode(handle, whole_file_bytes)
orig_fragments = fragments[:]
for i in range(iterations):
missing_idxs = []
num_missing = hd - 1
for j in range(num_missing):
num_frags_left = len(fragments)
idx = random.randint(0, num_frags_left - 1)
fragments.pop(idx)
timer.start()
decoded_file_bytes = pyeclib_c.decode(handle,
fragments,
len(fragments[0]))
tsum += timer.stop_and_return()
fragments = orig_fragments[:]
if whole_file_bytes != decoded_file_bytes:
success = False
return success, tsum / iterations
def decode(self,
fragment_payloads,
ranges=None,
force_metadata_checks=False):
fragment_len = self._validate_and_return_fragment_size(
fragment_payloads)
if fragment_len < 0:
raise ECPyECLibException(
"Invalid fragment payload in ECPyECLibDriver.decode")
if len(fragment_payloads) < self.k:
raise ECPyECLibException(
"Not enough fragments given in ECPyECLibDriver.decode")
try:
ret = pyeclib_c.decode(self.handle, fragment_payloads,
fragment_len, ranges, force_metadata_checks)
except PyECLibError as e:
raise ECPyECLibException(e)
# Was there an error decoding
if ret is None:
raise ECPyECLibException(
"Error decoding from fragments in ECPyECLibDriver.decode")
return ret
def decode(self, fragment_payloads, ranges=None,
force_metadata_checks=False):
fragment_len = self._validate_and_return_fragment_size(
fragment_payloads)
if fragment_len < 0:
raise ECDriverError(
"Invalid fragment payload in ECPyECLibDriver.decode")
if len(fragment_payloads) < self.k:
raise ECInsufficientFragments(
"Not enough fragments given in ECPyECLibDriver.decode")
return pyeclib_c.decode(self.handle, fragment_payloads, fragment_len,
ranges, force_metadata_checks)
def decode(self, fragment_payloads, ranges=None,
force_metadata_checks=False):
_fragment_payloads = list(fragment_payloads)
fragment_len = self._validate_and_return_fragment_size(
_fragment_payloads)
if fragment_len < 0:
raise ECDriverError(
"Invalid fragment payload in ECPyECLibDriver.decode")
if len(_fragment_payloads) < self.k:
raise ECInsufficientFragments(
"Not enough fragments given in ECPyECLibDriver.decode")
return pyeclib_c.decode(self.handle, _fragment_payloads,
fragment_len, ranges, force_metadata_checks)
def time_range_decode(self, num_data, num_parity, ec_type, hd, file_size,
iterations):
"""
:return 2-tuple, (success, average decode time)
"""
timer = Timer()
tsum = 0
handle = pyeclib_c.init(num_data, num_parity, ec_type, hd)
whole_file_bytes = self.get_tmp_file(file_size).read()
success = True
begins = [
long(random.randint(0,
len(whole_file_bytes) - 1)) for i in range(3)
]
ends = [
long(random.randint(begins[i], len(whole_file_bytes)))
for i in range(3)
]
ranges = zip(begins, ends)
fragments = pyeclib_c.encode(handle, whole_file_bytes)
orig_fragments = fragments[:]
for i in range(iterations):
missing_idxs = []
num_missing = hd - 1
for j in range(num_missing):
num_frags_left = len(fragments)
idx = random.randint(0, num_frags_left - 1)
fragments.pop(idx)
timer.start()
decoded_file_ranges = pyeclib_c.decode(handle, fragments,
len(fragments[0]), ranges)
tsum += timer.stop_and_return()
fragments = orig_fragments[:]
range_offset = 0
for r in ranges:
if whole_file_bytes[r[0]:r[1] +
1] != decoded_file_ranges[range_offset]:
success = False
range_offset += 1
return success, tsum / iterations
def time_range_decode(self,
num_data, num_parity, ec_type, hd,
file_size, iterations):
"""
:return 2-tuple, (success, average decode time)
"""
timer = Timer()
tsum = 0
handle = pyeclib_c.init(num_data, num_parity, ec_type, hd)
whole_file_bytes = self.get_tmp_file(file_size).read()
success = True
begins = [int(random.randint(0, len(whole_file_bytes) - 1))
for i in range(3)]
ends = [int(random.randint(begins[i], len(whole_file_bytes)))
for i in range(3)]
ranges = list(zip(begins, ends))
fragments = pyeclib_c.encode(handle, whole_file_bytes)
orig_fragments = fragments[:]
for i in range(iterations):
num_missing = hd - 1
for j in range(num_missing):
num_frags_left = len(fragments)
idx = random.randint(0, num_frags_left - 1)
fragments.pop(idx)
timer.start()
decoded_file_ranges = pyeclib_c.decode(handle,
fragments,
len(fragments[0]),
ranges)
tsum += timer.stop_and_return()
fragments = orig_fragments[:]
range_offset = 0
for r in ranges:
if whole_file_bytes[
r[0]: r[1] + 1] != decoded_file_ranges[range_offset]:
success = False
range_offset += 1
return success, tsum / iterations