Wouahhhhhh you are not playing :) This is cool. My network at home is lame to the dispear of my sons.
Stef > On 3 Feb 2019, at 12:06, Ben Coman <b...@openinworld.com> wrote: > > > On Sat, 2 Feb 2019 at 18:54, ducasse <steph...@netcourrier.com > <mailto:steph...@netcourrier.com>> wrote: > > On Sat, 2 Feb 2019 at 11:01, Ben Coman <b...@openinworld.com > > <mailto:b...@openinworld.com>> wrote: > > > > > I am getting network errors trying to download latest Pharo Launcher, > > > > can you tell me how so that I try to reproduce it? > > Since network performance depends a lot on location, and presuming you'd > need to be at my house to reproduce my experience, > I spent the afternoon learning about AWS so I could do some testing from a > Australian based cloud box > that you should be able to reproduce fairly easily, since this was my first > time using AWS. > > With this 10 minute tutorial... > [Launch a Linux Virtual > Machine](https://aws.amazon.com/getting-started/tutorials/launch-a-virtual-machine/ > <https://aws.amazon.com/getting-started/tutorials/launch-a-virtual-machine/>) > 1. Signed up and signed in > Tip: I struggled a long while looping on "Sign in with root account > credentials" until I discovered I needed to use the email address I signed up > with, not the account name. > > [Edit:] In the top right between account name and support, > pulled down list and selected "Asia Pacfic (Sydney)" > > > 2. Clicked "Launch a virtual machine" > (note, that only seems to show up for blank account, otherwise its "Launch > Instance" > > > 3. Ticked "Free tier only" filter. > + Selected "Amazon Linux 2 AMI (HVM), SSD Volume Type" > + Clicked <Review and Launch> (used default t2.micro) > + Clicked <Launch> > + From the pull-down selected "Create a new key pair", > gave it a name and clicked <Download Keypair> saved as > "SydneyPharoSpeedTest.pem" > + Clicked <Launch Instance> > + Clicked <View Instances> > noted instance... > * IP address: 54.252.136.78 > * Zone: ap-southeast-2b > * Security Group: Launch Wizard 1 > > 4. On my Windows 10 box, in WSL did... > $ cd ~/.ssh # if it doesn't exist, first do... mkdir -m 700 ~/.ssh > $ cp /mnt/c/Users/Ben/Downloads/SydneyPharoSpeedTest.pem ~/.ssh > $ chmod 400 ~/.ssh/SydneyPharoSpeedTest.pem > $ ssh -i ~/.ssh/SydneyPharoSpeedTest.pem ubuntu@54.252.136.78 > <mailto:ubuntu@54.252.136.78>$ cat /etc/os-release > ID="amzn" > ID_LIKE="centos rhel fedora" > > > GOOD NETWORK BASELINE TEST... > Ignoring any packet loss on poor networks, first testing low bandwidths on a > good network > $ vi test.sh > #!/bin/sh > if [ -d out ]; then > dirdate=`stat -c %z out | awk '{print $1"-"$2}' ` > mv out out.${dirdate} > fi > mkdir out > for RATE in 1000k 500k 200k 100k 50k 20k 10k 5k 2k 1k > do > echo $RATE > /usr/bin/time -f "%e" -o out/time.$RATE \ > wget --quiet --limit-rate $RATE > https://files.pharo.org/pharo-launcher/1.6/pharo-launcher-1.6.msi > <https://files.pharo.org/pharo-launcher/1.6/pharo-launcher-1.6.msi> -O > out/file.$RATE & > done > > $ sh test.sh > monitoring with... > $ cat out/time* | sort -n > $ ls -lS out > > results in following table and graphs... > $RATE > (kb/s) TIME > (s) TIME > (min) TIME > (hr) > 1000 54 1 0.0 > 500 105 2 0.0 > 200 259 4 0.1 > 100 515 9 0.1 > 50 1029 17 0.3 > 20 2576 43 0.7 > 10 5149 86 1.4 > 5 10527 175 2.9 > > <download-speed.png> > > Wow that surprised me. I'm not sure what the behaviour of file servers at > low bandwidth should be, > but intuitively the above seems odd. In the past troubleshooting seems to > have been > focused on the cause of slow speeds, but these can occur for many reasons > unrelated to the > the file server. The above test ignores cause to isolate behaviour at slow > speeds. > > I forgot my own download speed yesterday (today is okay), but here is another > sample... > "(in Argentina) it is really slow ... 3.5KB/s ... average 10KB/s". > http://forum.world.st/Pharo-Downloads-are-sluggish-td5084963.html > <http://forum.world.st/Pharo-Downloads-are-sluggish-td5084963.html> > > I would hope that download time was near linear with speed all the way down > to 1kb/s. > Anyone have some sysadmins they can lean on to understand if that is > realistic? > > The straightness of the line using a log-log axis makes it seem like policy > rather than physics. > <download-speed(log).png> > > HTH, > cheers -ben
