I was trying to measure the file transfer rates between my home and my office boxes. Both are 9.0-current.
At home I've wireless, TL-WN851N, using ath(4) driver. I used sftp(1), which I launch from the home box. I made files sized 10MB, 100MB and 1GB via dd if=/dev/zero of=/home/mexas/1gb bs=1m count=10 dd if=/dev/zero of=/home/mexas/1gb bs=1m count=100 dd if=/dev/zero of=/home/mexas/1gb bs=1m count=1024 respectively. What I discovered is put(mput) is much slower than get(mget). Here is a sample of timings: 10MB file ######### sftp> put 1gb Uploading 1gb to /usr/home/mexas/1gb 1gb 100% 10MB 59.2KB/s 02:53 sftp> mget 1gb Fetching /usr/home/mexas/1gb to 1gb /usr/home/mexas/1gb 100% 10MB 330.3KB/s 00:31 100MB file ########## sftp> mput 1gb Uploading 1gb to /usr/home/mexas/1gb 1gb 100% 100MB 58.6KB/s 29:07 sftp> mget 1gb Fetching /usr/home/mexas/1gb to 1gb /usr/home/mexas/1gb 100% 100MB 1.0MB/s 01:41 sftp> mget 1gb Fetching /usr/home/mexas/1gb to 1gb /usr/home/mexas/1gb 100% 100MB 930.9KB/s 01:50 1GB file ######## sftp> mget 1gb Fetching /usr/home/mexas/1gb to 1gb /usr/home/mexas/1gb 100% 1024MB 796.8KB/s 21:56 sftp> mput 1gb Uploading 1gb to /usr/home/mexas/1gb 1gb 7% 79MB 56.3KB/s 4:46:28 ETA (I interrupted the last transfer, just too long to wait). So putting (sending) a file is about 5-17 times faster than getting (receiving) it. What is the reason behind this? many thanks anton -- Anton Shterenlikht Room 2.6, Queen's Building Mech Eng Dept Bristol University University Walk, Bristol BS8 1TR, UK Tel: +44 (0)117 331 5944 Fax: +44 (0)117 929 4423 _______________________________________________ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "freebsd-questions-unsubscr...@freebsd.org"
