11 Oct
2007
11 Oct
'07
10:48 a.m.
Hi,
On Thu, Oct 11, 2007 at 04:43:23AM -0400, Paul Davis wrote:
On Thu, 2007-10-11 at 11:52 +0700, Patrick Shirkey
wrote:
Or, use Python instead of bash...
Python gets you a full POSIX interface, and you can work a shell from within
Python (when you need it).
Alternatively, you could whip up a very small Python/C/whatever program that you
could call from your shell script. It could even print the percentages to
stdout or stderr, making your shell script's life easier:
$ copy-sync source dest
10%
20%
30%
40%
50%
60%
70%
80%
90%
100%
-Forest
--
Forest Bond
http://www.alittletooquiet.net
On Wed, 2007-10-10 at 06:37 -0400, Forest Bond
wrote:
if you use your own compiled code for the copy, you can open the
destination files with O_SYNC. from man 2 open:
O_SYNC The file is opened for synchronous I/O. Any write()s on
the resulting file descriptor will block the calling process
until the data has been physically written to the underlying
hardware. See RESTRICTIONS below, though.
this avoids having the entire mount be done with the sync option. Hi,
On Wed, Oct 10, 2007 at 09:51:35AM +0700, Patrick Shirkey wrote:
For the purpose of this script I am happy with just write but I will be
needing read in the near future.
FYI, I can connect 200 usb-storage devices to a dual cpu intel with 4 GB
RAM and an extra pci-usb card on the same irq as the internal usb bus.
Basically I am uploading content to a couple of hundred mp3/multi media
players at the same time and this script is used by other people with
less Linux knowledge than I so I'm trying to make the progress bar as
accurate as possible. Otherwise there is a significant lag between when
the progress bar says it is finished to when the transfer is actually
finished. Speed is also a major issue here so I cannot use the sync
option as that causes way too much delay compared to async.
Can anyone here shed a little more light on how to monitor the disk
activity while transferring data? On Tue, 2007-10-09 at 09:16 -0400, Forest Bond
wrote:
> On Tue, Oct 09, 2007 at 01:11:38PM +0200, Lars Luthman wrote:
> > Slightly-slower-hack: add the 'sync' option to whatever script or
config
> > file is used to mount the device (/etc/fstab, udev rules, KDE service
> > menu etc). That way all writes will be synchronised automatically.
>
> It sounds like this doesn't matter much for you, but keep in mind that -o
> sync doesn't cause reads to be unbuffered, so don't go trying to benchmark
> your flash devices that way!
Hmm, I need speed and accuracy.
But only for writes, no?