On Tue, Feb 09, 2010 at 11:24:48PM +0000, Vincent Hoffman wrote: > On 09/02/2010 23:16, Anton Shterenlikht wrote: > > 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? > Just a thought, Since you are in the uk, do you have ADSL at home? If so > the upload on ADSL is much lower than the download.
yes, probably. It's a Virgin broadband. I guess it's ADSL. Anyway, that's just what I wanted to hear. 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"
