Tuesday, October 20, 2020¶

Lino Voga¶

I had a quick Lino Voga demo session with Arnold. We observed that the voga demo project has no presences at all at the moment. And as I expected this was caused by a change for some other customer: Course lines must now have a guest role specified if you want them to fill the guest of calendar events. When I did this change, I didn’t care about voga and blindly adapted the doctests to match the new results without noting that this was anormal.

I then discovered another subtle problem: Voga permits to have several enrolments for a same person in a same course, provided they have separate date ranges. Since this is a higher level integrity constraint, we remove that database level unique clause.

The Lino framework is again slow¶

I started to setup a second front end for the voga1e demo site on The Lino framework (according to the instructions in Multiple front ends for a same site) and fell again into #3825. As usual, the server seems to “freeze” as soon as I ask it to do something:

$ pip install -U lino lino_xl lino_cosi lino_voga lino_noi lino_react
Collecting lino
  Downloading lino-20.10.0.tar.gz (10.1 MB)
     |████████████████████████████████| 10.1 MB 151 kB/s
Collecting lino_xl
  Downloading lino-xl-20.10.1.tar.gz (3.2 MB)
     |████████████████████████████████| 3.2 MB 13.0 MB/s
Collecting lino_cosi
  Downloading lino-cosi-20.10.0.tar.gz (608 kB)
     |████████████████████████████████| 608 kB 12.2 MB/s
Collecting lino_voga
  Downloading lino-voga-20.10.0.tar.gz (101 kB)
     |████████████████████████████████| 101 kB 3.7 MB/s

After some time it stayed stuck… Maybe it is because LF is a “Sandbox” server. OVH says: Instances with shared resources (Sandbox) are suitable for testing, verifications and development environments. Their performance may vary slightly over time.

$ ps -o pid,user,%mem,command ax | sort -b -k3 -r
  PID USER     %MEM COMMAND
mysql     6.4 /usr/sbin/mysqld
www-data  6.2 /usr/bin/uwsgi --ini /usr/local/lino/lino_local/voga1e/nginx/uwsgi.ini
www-data  6.2 /usr/bin/uwsgi --ini /usr/local/lino/lino_local/voga1e/nginx/uwsgi.ini
www-data  5.9 /usr/bin/uwsgi --ini /usr/local/lino/lino_local/noi1r/nginx/uwsgi.ini
www-data  5.7 python /usr/local/lino/lino_local/noi1r/manage.py linod
www-data  5.6 /usr/bin/uwsgi --ini /usr/local/lino/lino_local/voga1e/nginx/uwsgi.ini
www-data  5.6 /usr/bin/uwsgi --ini /usr/local/lino/lino_local/cosi1e/nginx/uwsgi.ini
www-data  5.5 /usr/bin/uwsgi --ini /usr/local/lino/lino_local/noi1r/nginx/uwsgi.ini
www-data  5.5 /usr/bin/uwsgi --ini /usr/local/lino/lino_local/noi1r/nginx/uwsgi.ini
www-data  5.0 /usr/bin/uwsgi --ini /usr/local/lino/lino_local/cosi1e/nginx/uwsgi.ini
www-data  4.5 /usr/bin/uwsgi --ini /usr/local/lino/lino_local/cosi1e/nginx/uwsgi.ini
www-data  4.5 python /usr/local/lino/lino_local/cosi1e/manage.py linod
list      1.9 /usr/bin/python /var/lib/mailman/bin/qrunner --runner=VirginRunner:0:1 -s
list      1.9 /usr/bin/python /var/lib/mailman/bin/qrunner --runner=OutgoingRunner:0:1 -s
list      1.6 /usr/bin/python /var/lib/mailman/bin/qrunner --runner=IncomingRunner:0:1 -s