Hi!
Ha, I remembered right that I had seen such a problem reported before...
On 2018-01-15T12:31:04+0100, Bruno Haible wrote:
> I tried:
>> # tar cf - directory | ssh bruno@10.0.2.2 tar xf -
>> It hangs after transferring 1.6 GB. I.e. no more data arrives within 15
>> minutes.
You were lucky: for me it stopped much earlier (a few dozen MiB) -- the
file I'm trying to transfer is just 460 MiB in size. ;-)
> Found a workaround: Throttling of the bandwidth.
> - Throttling at the network adapter level [1] is not applicable to Hurd.
> - The 'throttle' program [2] is no longer available.
> - But a replacement program [3] is available.
Or use the '--bwlimit' functionality of 'rsync', or the '--rate-limit'
functionality of 'pv', which are often already packaged, readily
available.
> The command that worked for me (it limits the bandwidth to 1 MB/sec):
>
> # tar cf - directory | ~/throttle.py --bandwidth 1024576 | ssh bruno@10.0.2.2
> tar xf -
I thus tried:
$ pv --rate-limit 1M [file] | ssh [...] 'cat > [file]'
..., which crashed after 368 MiB. After rebooting, a 'rsync -Pa
--inplace --bwlimit=500K' was then able to complete the transfer; the two
files' checksums do match.
> But really, this is only a workaround. It smells like a bug in ssh or the
> Hurd.
As all networking seems to go down, maybe it's that the GNU Hurd
networking stack ('pfinet', 'netdde') gets "overwhelmed" by that much
data.
(That was on a Debian GNU/Hurd installation that's more than a one year
out of date, so there's a -- slight? ;-D -- chance that this has been
fixed already.)
Grüße
Thomas
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