Debian/nginx/systemd deployment:
I made scheduler working with help:
https://groups.google.com/d/msg/web2py/eHXwines4o0/i3WqDlKjCQAJ
and
https://groups.google.com/d/msg/web2py/jFWNnz5cl9U/UpBSkxf4_2kJ
Thank you very much Niphlod, Michael M, Brian M
Dne čtvrtek 5. května 2016 13:06:04 UTC+2
Yes.
I run with scheduler already. It is really nice and great !
Going away from the ajax solution it was easy and there was almost no
problem. (I have very easy parameters for the task and I return nothing,
just I save into db.)
The result code is cleaner (one task starting call instead of
NP: as everything it's not the silver bullet but with the redis incarnation
I'm sure you can achieve less than 3 second (if you tune heartbeat even
less than 1 second) from when the task gets queued to when it gets
processed.
On Tuesday, May 3, 2016 at 12:32:13 PM UTC+2, Mirek Zvolský wrote:
>
Hi, Niphlod.
After I have read something about scheduler,
I am definitively sorry for my previous notes
and I choose web2py scheduler of course.
It will be my first use of it (with much older ~3 years web2py app I have
used cron only),
so it will take some time to learn with scheduler. But it
You are right.
At this time it works for me via ajax well and I will look carefully for
problems.
If so, I will move to scheduler.
I see this is exactly what Massimo(?) writes at the bottom of Ajax chapter
of the book.
PS: about times:
At notebook with mobile connection it takes 20-40s. So it
the statement "I don't need to use the scheduler, because I want to start
it as soon as possible" is flaky at best. If your "fetching" varies from 2
to 20 seconds and COULD extend further to 60 seconds, waiting a few seconds
for the scheduler to start the process is uhm... debatable.
Of
Thanks for info and tips, 6 years later.
What I try to do
is a form with single input, where user gives a query string
and then data about (usually ~300) books will be retrieved via z39 and marc
protocol/format, parsed and saved into local database.
Of course this will take a time (2? 5? 20?
I started looking at this a bit, you can find the specs for the Comet
protocol, such as it is at
http://svn.cometd.com/trunk/bayeux/bayeux.html It's built on top of
JSON but isn't quite JSON-RPC. More of a publish/subscribe model.
The latest version of 'cometd' just released a beta release
Thanks all for answering friends! I've extracted some good info from
this discussion, and the solution proposed by Massimo work well :)
I won't have time to work out a async proof of concept at this time. I
hope to get this after some more real world profiling with my web2py
app though. To give you an idea of how an async web framework could
feel as natural in programming style as web2py (eg. no call backs all
over the place),
I would use a background process that does the work and adds the items
to a database table. The index function would periodically refresh or
pull an updated list via ajax from the database table. there is no way
for te server to trigger an action in the browser unless 1) the
browser initiates it
Well, actually there is a way for the server to trigger an action in
the browser. It's called comet. Of course under the hood it's
implemented on top of http, so it's browser who initiates request, but
from the developer perspective it looks like there is dual channel
connection between the
It seems like Comet would be hard to implement in web2py. Does web2py
use a threadpool internally? If so, I can see you run out of threads
pretty quickly. Ideally you would like to solve these kind of problems
with an asynchronous model (think Gevent, Eventlet, Concurrence,
Toranado). I am working
Comet is a nice way to get this done but I wonder how to implement
comet efficiently in web2py. Massimo, does web2py use a threadpool
under the hood? For comet you would then quickly run out of threads.
If you'd try to do this with a thread per connection things would get
out of hand pretty
On May 25, 9:24 pm, Allard docto...@gmail.com wrote:
Comet is a nice way to get this done but I wonder how to implement
comet efficiently in web2py.
I have never used comet but I do not see any major problem
Massimo, does web2py use a threadpool
under the hood? For comet you would then
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