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#!/usr/bin/env python
# Copyright (C) 2015-2016 Red Hat, Inc. <http://www.redhat.com>
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License along
# with this program; if not, write to the Free Software Foundation, Inc.,
# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
import argparse
import random
import os
import time
import string
import datetime
from multiprocessing import Process
import sys
def is_root(path):
"""Check whether the given path is '/' or not
Args:
path (str): Path of the dir to check
Returns:
True if path is '/' , False otherwise
"""
if os.path.realpath(os.path.abspath(path)) is '/':
print ("Directory '%s' is the root of filesystem. "
"Not performing any operations on the root of filesystem" %
os.path.abspath(path))
return True
else:
return False
def path_exists(path):
"""Check if path exists are not.
Args:
path (str): Path to check if it exist or not.
Returns:
bool : True if path exists, False otherwise.
"""
if os.path.exists(os.path.abspath(path)):
return True
else:
return False
def create_dir(dir_path):
"""Create dir if 'dir_path' does not exists
Args:
dir_path (str): Directory path to create
Returns:
0 on successful creation of dir, 1 otherwise.
"""
dir_abs_path = os.path.abspath(dir_path)
if not path_exists(dir_abs_path):
try:
os.makedirs(dir_abs_path)
except (OSError, IOError):
print "Unable to create dir: %s" % dir_abs_path
return 1
return 0
def fd_write_file(filename, file_size, chunk_sizes_list, write_time,
delay_between_writes=10, log_level='INFO'):
"""Write random data to the file until write_time
"""
rc = 0
time_counter = 0
try:
fd = open(filename, "w+b")
fd.seek(file_size-1)
fd.write("0")
fd.flush()
except IOError as e:
print ("Unable to open file %s for writing : %s" % (filename,
e.strerror))
return 1
while time_counter < write_time:
try:
actual_file_size = os.stat(filename).st_size
current_chunk_size = random.choice(chunk_sizes_list)
write_data = (''.join(random.choice(string.printable) for x in
range(current_chunk_size)))
offset = random.randint(0, (actual_file_size - current_chunk_size))
if log_level.upper() == 'DEBUG':
print ("\tFileName: %s, File Size: %s, "
"Writing to offset: %s, "
"Data Length: %d, Time Counter: %d" %
(filename, actual_file_size, offset, len(write_data),
time_counter))
fd.seek(offset)
fd.write(write_data)
fd.seek(0)
fd.flush()
except IOError as e:
print ("Unable to write to file '%s' : %s at time count: %dS" %
(filename, e.strerror, time_counter))
rc = 1
time.sleep(delay_between_writes)
time_counter = time_counter + delay_between_writes
fd.close()
return rc
def fd_writes(args):
dir_path = os.path.abspath(args.dir)
number_of_files = int(args.num_of_files)
base_file_name = args.base_file_name
file_sizes_list = args.file_sizes_list
if file_sizes_list:
file_sizes_list = filter(None, args.file_sizes_list.split(","))
chunk_sizes_list = args.chunk_sizes_list
if chunk_sizes_list:
chunk_sizes_list = map(int, filter(None,
args.chunk_sizes_list.split(",")))
write_time = int(args.write_time)
delay_between_writes = int(args.delay_between_writes)
log_level = args.log_level
# Check if dir_path is '/'
if is_root(dir_path):
return 1
# Create dir_path
rc = create_dir(dir_path)
if rc != 0:
return rc
file_sizes_dict = {
'k': 1024,
'K': 1024,
'm': 1024*1024,
'M': 1024*1024,
'g': 1024*1024*1024,
'G': 1024*1024*1024
}
file_sizes_expanded_list = []
for size in file_sizes_list:
if size.isdigit():
file_sizes_expanded_list.append(size)
else:
size_numeric_value = int(size[:-1])
size_postfix = size[-1]
size_expanded = size_numeric_value * file_sizes_dict[size_postfix]
file_sizes_expanded_list.append(size_expanded)
process_list = []
for dirName, subdirList, fileList in os.walk(dir_path, topdown=False):
all_files_list = []
for i in range(number_of_files):
filename = os.path.join(dirName, "%s_%d" % (base_file_name, i))
all_files_list.append(filename)
for filename in all_files_list:
process_list.append(
Process(target=fd_write_file,
args=(filename,
random.choice(file_sizes_expanded_list),
chunk_sizes_list,
write_time, delay_between_writes, log_level)
))
for each_process in process_list:
each_process.start()
for each_process in process_list:
each_process.join()
return 0
if __name__ == "__main__":
parser = argparse.ArgumentParser(
description="Program to perform fd based writes on files for time t",
formatter_class=argparse.ArgumentDefaultsHelpFormatter)
parser.add_argument('-f', '--file-sizes-list',
help="Randomly select the size of the "
"file from comma separated file_sizes_list. "
"Example: 1k,10k,512K,1M,512m,1g,5G. ",
dest="file_sizes_list",
action="store",
default="1k,10k,512k,1M")
parser.add_argument('-c', '--chunk-sizes-list',
help="Randomly select chunk size per write from "
"comma separated chunk_sizes_list. "
"Example: 16,32,64,128,256,512,1024. ",
dest="chunk_sizes_list",
action="store",
default="16,32,64,128,256,512,1024")
parser.add_argument('-t', '--write-time',
help="Total write time for a file in seconds.",
dest="write_time", action="store", default=60)
parser.add_argument('-d', '--delay-between-writes',
help="Delay time between writes in seconds. ",
dest="delay_between_writes", action="store",
default=10)
parser.add_argument('-n', '--num-of-files',
help="Number of files to create ",
dest="num_of_files", action="store", default=1)
parser.add_argument('-b', '--base-file-name',
help="Base File Name",
dest='base_file_name', action="store",
default="testfile")
parser.add_argument('--log-level',
help="Log Level",
dest='log_level', action="store",
default="INFO")
parser.add_argument('dir', metavar='DIR', type=str,
help="Directory on which operations has "
"to be performed")
parser.set_defaults(func=fd_writes)
print "Starting Script: %s" % ' '.join(sys.argv)
print "StarTime :'%s' " % (datetime.datetime.now())
test_start_time = datetime.datetime.now().replace(microsecond=0)
args = parser.parse_args()
rc = args.func(args)
test_end_time = datetime.datetime.now().replace(microsecond=0)
print "Execution time: %s" % (test_end_time - test_start_time)
print "EndTime :'%s' " % (datetime.datetime.now())
sys.exit(rc)
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