Python: Multiprocessing Copying
Hey I try to create a multiprocessing copying process. But I have several problems. I alwys get the error OSError: [Errno 24] Too many open files. I think my function creates too many processes which are all open the same time. Im new in multiprocessing. I have a multithreading version but I want to do it with multiprocessing. The Input for the Function copyFileList is a dataframe with two colums, with the file source and the file destination. So what I am doing wrong here? Best regards!
from multiprocessing import Queue, Process, Value, Lock, cpu_count
class CTError(Exception):
def __init__(self, errors):
self.errors = errors
try:
O_BINARY = os.O_BINARY
except:
O_BINARY = 0
READ_FLAGS = os.O_RDONLY | O_BINARY
WRITE_FLAGS = os.O_WRONLY | os.O_CREAT | os.O_TRUNC | O_BINARY
BUFFER_SIZE = 128*1024
def copyfile2(src, dst):
try:
fin = os.open(src, READ_FLAGS)
stat = os.fstat(fin)
fout = os.open(dst, WRITE_FLAGS, stat.st_mode)
for x in iter(lambda: os.read(fin, BUFFER_SIZE), b""):
os.write(fout, x)
finally:
try: os.close(fin)
except: pass
try: os.close(fout)
except: pass
def addToQueueFile(src,dst, queue):
queue.put(copyfile2(src,dst))
queue.get()
def copyFileList(srcDst,multiproc=2):
from multiprocessing import Queue, Process, cpu_count
if multiproc == 2:
if __name__ == '__main__':
queue = Queue()
processes =
for count,row in enumerate(srcDst.itertuples()):
processes.append(Process(target = addToQueueFile,
args = (row[1],row[2],queue,)))
processes[-1].start()
python multiprocessing
asked Nov 19 '18 at 11:12
VarlorVarlor
286215
add a comment |
Hey I try to create a multiprocessing copying process. But I have several problems. I alwys get the error OSError: [Errno 24] Too many open files. I think my function creates too many processes which are all open the same time. Im new in multiprocessing. I have a multithreading version but I want to do it with multiprocessing. The Input for the Function copyFileList is a dataframe with two colums, with the file source and the file destination. So what I am doing wrong here? Best regards!
from multiprocessing import Queue, Process, Value, Lock, cpu_count
class CTError(Exception):
def __init__(self, errors):
self.errors = errors
try:
O_BINARY = os.O_BINARY
except:
O_BINARY = 0
READ_FLAGS = os.O_RDONLY | O_BINARY
WRITE_FLAGS = os.O_WRONLY | os.O_CREAT | os.O_TRUNC | O_BINARY
BUFFER_SIZE = 128*1024
def copyfile2(src, dst):
try:
fin = os.open(src, READ_FLAGS)
stat = os.fstat(fin)
fout = os.open(dst, WRITE_FLAGS, stat.st_mode)
for x in iter(lambda: os.read(fin, BUFFER_SIZE), b""):
os.write(fout, x)
finally:
try: os.close(fin)
except: pass
try: os.close(fout)
except: pass
def addToQueueFile(src,dst, queue):
queue.put(copyfile2(src,dst))
queue.get()
def copyFileList(srcDst,multiproc=2):
from multiprocessing import Queue, Process, cpu_count
if multiproc == 2:
if __name__ == '__main__':
queue = Queue()
processes =
for count,row in enumerate(srcDst.itertuples()):
processes.append(Process(target = addToQueueFile,
args = (row[1],row[2],queue,)))
processes[-1].start()
python multiprocessing
asked Nov 19 '18 at 11:12
VarlorVarlor
286215
add a comment |
Hey I try to create a multiprocessing copying process. But I have several problems. I alwys get the error OSError: [Errno 24] Too many open files. I think my function creates too many processes which are all open the same time. Im new in multiprocessing. I have a multithreading version but I want to do it with multiprocessing. The Input for the Function copyFileList is a dataframe with two colums, with the file source and the file destination. So what I am doing wrong here? Best regards!
from multiprocessing import Queue, Process, Value, Lock, cpu_count
class CTError(Exception):
def __init__(self, errors):
self.errors = errors
try:
O_BINARY = os.O_BINARY
except:
O_BINARY = 0
READ_FLAGS = os.O_RDONLY | O_BINARY
WRITE_FLAGS = os.O_WRONLY | os.O_CREAT | os.O_TRUNC | O_BINARY
BUFFER_SIZE = 128*1024
def copyfile2(src, dst):
try:
fin = os.open(src, READ_FLAGS)
stat = os.fstat(fin)
fout = os.open(dst, WRITE_FLAGS, stat.st_mode)
for x in iter(lambda: os.read(fin, BUFFER_SIZE), b""):
os.write(fout, x)
finally:
try: os.close(fin)
except: pass
try: os.close(fout)
except: pass
def addToQueueFile(src,dst, queue):
queue.put(copyfile2(src,dst))
queue.get()
def copyFileList(srcDst,multiproc=2):
from multiprocessing import Queue, Process, cpu_count
if multiproc == 2:
if __name__ == '__main__':
queue = Queue()
processes =
for count,row in enumerate(srcDst.itertuples()):
processes.append(Process(target = addToQueueFile,
args = (row[1],row[2],queue,)))
processes[-1].start()
python multiprocessing
asked Nov 19 '18 at 11:12
VarlorVarlor
286215
Hey I try to create a multiprocessing copying process. But I have several problems. I alwys get the error OSError: [Errno 24] Too many open files. I think my function creates too many processes which are all open the same time. Im new in multiprocessing. I have a multithreading version but I want to do it with multiprocessing. The Input for the Function copyFileList is a dataframe with two colums, with the file source and the file destination. So what I am doing wrong here? Best regards!
from multiprocessing import Queue, Process, Value, Lock, cpu_count
class CTError(Exception):
def __init__(self, errors):
self.errors = errors
try:
O_BINARY = os.O_BINARY
except:
O_BINARY = 0
READ_FLAGS = os.O_RDONLY | O_BINARY
WRITE_FLAGS = os.O_WRONLY | os.O_CREAT | os.O_TRUNC | O_BINARY
BUFFER_SIZE = 128*1024
def copyfile2(src, dst):
try:
fin = os.open(src, READ_FLAGS)
stat = os.fstat(fin)
fout = os.open(dst, WRITE_FLAGS, stat.st_mode)
for x in iter(lambda: os.read(fin, BUFFER_SIZE), b""):
os.write(fout, x)
finally:
try: os.close(fin)
except: pass
try: os.close(fout)
except: pass
def addToQueueFile(src,dst, queue):
queue.put(copyfile2(src,dst))
queue.get()
def copyFileList(srcDst,multiproc=2):
from multiprocessing import Queue, Process, cpu_count
if multiproc == 2:
if __name__ == '__main__':
queue = Queue()
processes =
for count,row in enumerate(srcDst.itertuples()):
processes.append(Process(target = addToQueueFile,
args = (row[1],row[2],queue,)))
processes[-1].start()
python multiprocessing
python multiprocessing
asked Nov 19 '18 at 11:12
VarlorVarlor
286215
asked Nov 19 '18 at 11:12
VarlorVarlor
286215
edited Nov 19 '18 at 11:17
Varlor
asked Nov 19 '18 at 11:12
VarlorVarlor
286215
asked Nov 19 '18 at 11:12
VarlorVarlor
286215
asked Nov 19 '18 at 11:12
VarlorVarlor
286215
286215
add a comment |
add a comment |
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