A computer can have as many connections to an IP address as it has free
ports (numbered up to 65535, although many of the numbers less than 32768
are reserved) and memory for the software implementation of an abstract
concept called a "socket."
A TCP/IP connection is defined by four numbers: client IP address, client
port; server IP address, server port. For example, right now I have, inter
alia, the following connections displayed in the connections table of my
router:
192.168.0.100:61266 151.101.22.2:80
192.168.0.100:61368 151.101.22.2:80
192.168.0.100:61367 151.101.22.2:80
192.168.0.100:61265 151.101.22.2:80
192.168.0.100:61268 151.101.22.2:80
192.168.0.100:61269 151.101.22.2:80
151.101.22.2 is an IP address owned by fastly.com, a CDN, which I believe
stands for Content Delivery Network. When a browser accesses a webpage, it
is told to download the advertisements from fastly.com. Advertisers upload
their content to fastly.com, and it is delivered when and where requested.
Fastly may also help with billing issues and generating statistics on
impressions delivered and viewed and possibly follow thru, but I am not
certain about that.
I don't understand what this discussion is about, though I suspect it is
fundamentally about net neutrality. At one point the Oxford project person,
David, wrote:
It would be much easier if the clients did this. My Mac for example
is able to tell me the latest network bandwidth it has for any of its
interfaces.
If by client he means his application, then all he has to do is put the
download timing code in his application. Then if he wants to refuse to
deliver very large files to computers with very narrow bandwidth
connections, it is all on him and the school. I believe that if you just
explain to people with clear, jargon-less statements why it is infeasible to
deliver very large files in kilobit dribbles, they will not object. I did
not like it when GPU Grid told me I could not participate when I signed up
because my video cards were inadequate, but I got over it (and eventually
bought new video cards, which I used elsewhere).
Charles Elliott
-----Original Message-----
From: boinc_dev [mailto:boinc_dev-boun...@ssl.berkeley.edu] On Behalf Of
Robert Miles
Sent: Sunday, April 2, 2017 1:26 AM
To: boinc_dev@ssl.berkeley.edu
Subject: Re: [boinc_dev] An additional preference to prevent, downloading
when on WiFi, to enable downloading only on when connected, to cable
From what I've seen, Windows operating systems do not allow multiple
connections to the internet to be active at once, which means that only one
such connection can be reachable from BOINC at any one time.
On 3/30/2017 8:34 AM, boinc_dev-requ...@ssl.berkeley.edu wrote:
Date: Thu, 30 Mar 2017 16:15:55 +0300
From: Vitalii Koshura <lestat.de.lion...@gmail.com>
Subject: Re: [boinc_dev] An additional preference to prevent
downloading when on WiFi, to enable downloading only on when
connected
to cable
Hello gyus,
Maybe it would be preferably to let user choose the connection BOINC
uses for download/upload?
So in this case BOINC need to detect all available connections and
make a checkbox list where user can choose which connection should be
used when available?
Because doind automated testing of connection speed is not good for
these purposes.
Thanks
Best regards,
Vitalii Koshura
2017-03-30 16:08 GMT+03:00 McLeod, John <john.mcl...@sap.com>:
We have had this discussion before -- back in the days when dialup
was common. Without doing an end to end test of the connection there
is no way to tell what the connection speed is. Dialup is still the
way things are in some places in the world. Based on dialup with a
router and a switch, I can have a 1Gb connection locally but only a
1.3Kb connection to the outside world, and the computer cannot know
without doing an end to end test. With ADSL links (much more common
at the moment) it is possible to have a 1Gb connection locally and a 5Mb
connection to the outside world.
Running a check like this against some BOINC BOINC projects could tip
them over into congestion where nothing gets through.
So, it would require:
A selection for what high speed meant.
A checkbox to indicate if enabled.
An end to end check to see what the connection speed was.
Some idea of when to use it as doing an end to end connection check
when there was only a few hundred bytes to transfer does not seem
reasonable.
At the time it was decided that this was not something we wanted to
pursue. Of course, this can change.
Jm7
-----Original Message-----
From: boinc_dev [mailto:boinc_dev-boun...@ssl.berkeley.edu] On Behalf
Of David Wallom
Sent: Thursday, March 30, 2017 8:28 AM
To: elliott...@comcast.net; 'Nicol?s Alvarez'
<nicolas.alva...@gmail.com>; Andy Bowery <andy.bow...@oerc.ox.ac.uk>
Cc: boinc_dev@ssl.berkeley.edu
Subject: Re: [boinc_dev] An additional preference to prevent
downloading when on WiFi, to enable downloading only on when
connected to cable
Hi Charles,
With the increasing prevalence of mobile computing devices then
having the system (scheduler) doing the test is not really scalable
as people move their devices.
It would be much easier if the clients did this. My Mac for example
is able to tell me the latest network bandwidth if has for any of its
interfaces.
David
________________________________________
From: boinc_dev [boinc_dev-boun...@ssl.berkeley.edu] on behalf of
Charles Elliott [elliott...@comcast.net]
Sent: 30 March 2017 13:10
To: 'Nicol?s Alvarez'; Andy Bowery
Cc: boinc_dev@ssl.berkeley.edu
Subject: Re: [boinc_dev] An additional preference to prevent
downloading when on WiFi, to enable downloading only on when
connected to cable
Boinc could just download a test file from the Oxford website 5 times
and average the times. If the average was above a limit deemed the
minimum acceptable speed, the user would be permitted to proceed.
OW, the Oxford website would post a very polite, very detailed, and
very well written message to Boinc/the user explaining why a high
bandwidth connection is necessary for the user's progress and enjoyment
of Oxford's project.
One of the Boinc GPU projects, as I recall in Spain, does this now
WRT the capacity of the user's GPU(s). It is no fun for, or use to,
anyone if the user processes a work unit on an older GPU, the GPU
overheats, and the WU fails 3/4 of the way through. It is annoying
though.
Charles Elliott
-----Original Message-----
From: boinc_dev [mailto:boinc_dev-boun...@ssl.berkeley.edu] On Behalf
Of Nicol?s Alvarez
Sent: Wednesday, March 29, 2017 3:40 PM
To: Andy Bowery
Cc: BOINC Developers Mailing List ?[boinc_dev@ssl.berkeley.edu]?
Subject: Re: [boinc_dev] An additional preference to prevent
downloading when on WiFi, to enable downloading only on when
connected to cable
2017-03-29 14:45 GMT-03:00 Andy Bowery <andy.bow...@oerc.ox.ac.uk>:
Hi,
We would be interested in an additional BOINC preference, a tickbox
on
the 'Network' tab, with something like 'Download only when connected
to a high bandwidth connection'. Ticking the box of this preference
would prevent download of the application and supporting files when
the machine (for example: a laptop) was connected only to WiFi and
not connected to a higher bandwidth networking cable. Would it be
possible for this to be scheduled to be added as an item to be included
in a later release?
With regards,
What does "high bandwidth connection" mean, how could BOINC know if
it's connected to one?
--
Nicol?s
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