Question

I have linux (Ubuntu) machine as a client. I want to measure data transfer rate when 200 users try to download files from my server at the same time.

Is there some python or linux tool for this? Or can you recommend an approach?

I saw this speedcheck code, and I can wrap it in threads, but I don’t understand why the code there is so “complicated” and the block size changes all the time.

Answer 1

import threading
import time
import urllib2

block_sz = 8192
num_threads = 1
url = "http://192.168.1.1/bigfile2"
secDownload = 30

class DownloadFileThread(threading.Thread):
    def __init__(self):
        threading.Thread.__init__(self)

        self.u = urllib2.urlopen(url)
        self.file_size_dl = 0


    def run(self):
        while True:
            buffer = self.u.read(block_sz)
            if not buffer:
                raise 'There is nothing to read. You should have bigger file or smaller time'

            self.file_size_dl += len(buffer)


if __name__ == "__main__":
    print 'Download from url ' + url + ' use in ' + str(num_threads)  + ' to download. test time ' + str(secDownload)  
        threads = []
        for i in range(num_threads):
            downloadThread = DownloadFileThread()
            downloadThread.daemon = True
            threads.append(downloadThread)
        for i in range(num_threads):
            threads[i].start()
        time.sleep(secDownload)

        sumBytes=0
        for i in range(num_threads):
            sumBytes = sumBytes +  threads[i].file_size_dl
        print sumBytes
        print str(sumBytes/(secDownload *1000000)) + 'MBps'