[Qgis-psc] Proposal to support multi-threaded development

[Peter Wells]

Hi all,

Sorry I have entered the conversation quite late (just registered on the PSC
list and read through the previous mails...).  
 
When initially looking for funding for this work we did consider the PSC but
after discussions amongst ourselves, did not directly approach them as we
figured that the PSC is a charitable organisation with limited budget and
hence we did not feel comfortable asking them directly for funding.  

I'm not sure technically how the planned MT rendering work relates to work
that Marco has done in QGIS Enterprise - more of a technical question for
Martin (as well as that of the subject of Alvaros's work).  

In terms of the points Paolo made, any funding would go directly to Lutra
(Martin is part of our team so it indirectly funds his efforts).  In terms
of completion of the work, Martin has already made good progress on the
required tasks.  We (Lutra) are fully committed to finishing the work and
getting something useful and polished merged into the main code but it's
always nice to gather as much help as possible along the way.  

I also fully appreciate Paolo's point about funding features on a
first-come-first-serve basis (as opposed to voting on spending
democratically).  Donating funds like this without some kind of procedure in
place to do this in the fairest manner may end up setting some kind of
undesirable precedent for the long term.  

Kind regards,

Pete



Peter Wells

Lutra Consulting
23 Chestnut Close, Burgess Hill, RH15 8HN
www.lutraconsulting.co.uk
Tel:  +44 (0)1444 848012
Mob:  +44 (0)7704 781683
SIP:  1507403 at sipgate.co.uk


-----Original Message-----
From: Saber Razmjooei [mailto:saber.razmjooei at lutraconsulting.co.uk] 
Sent: 25 November 2013 18:21
To: peter.wells at lutraconsulting.co.uk
Cc: martin.dobias at lutraconsulting.co.uk
Subject: FW: [Qgis-psc] Proposal to support multi-threaded development

Cheers
Saber
-----Original Message-----
From: qgis-psc-bounces at lists.osgeo.org
[mailto:qgis-psc-bounces at lists.osgeo.org] On Behalf Of Paolo Cavallini
Sent: 25 November 2013 18:16
To: qgis-psc at lists.osgeo.org
Subject: Re: [Qgis-psc] Proposal to support multi-threaded development

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Il 25/11/2013 17:48, Jürgen E. Fischer ha scritto:

> On Sun, 24. Nov 2013 at 17:30:51 +0100, Andreas Neumann wrote:
>> I am asking the PSC that the international QGIS project is also 
>> co-funding this project, perhaps with approx. Euro 5k.
> 
> +1, if we have the funds.

I've asked Horst. He's not available until Dec 9th. Will let you know.

>> Marco Hugentobler worked on multi-threaded rendering in QGIS 
>> enterprise (based on the 1.9x branch).  Horst demoed this version at 
>> the recent QGIS CH coordination meeting. It looks very promising as 
>> it does not block the UI. Users can navigate to a different extent 
>> while QGIS is still rendering. QGIS would then cancel the old render 
>> threads and start with the new threads. But this work is not 
>> compatible with the 2.x development branch.
> 
> Isn't that a dead end?  Makes me wonder...

also difficult to understand for me.

My doubts (sorry, I'm on the bad side of the fence, in the interest of the
project):

* we surely have the money, but 5k is a large part of our budget
* would the money go to Lutra or directly to Martin?
* we are still far from the full budget: what happens if we reach only half
way? the multithreading work was already sponsored by GSoC, got halfway, and
never merged
* we do not have a policy for sponsoring features; I do not feel comfortable
sponsoring it on a "first ask - first serve" basis, without a general plan;
e.g. many users think a major bugfixing effort would be far more important
than multithtread; others need a better osgeo4w, etc.; BTW, I'm pretty sure
we could raise more money for these tasks.

I hope I did not sound too harsh: I'd love to have multithreading.
BTW, it seems to me that the work by Alvaro has received very little
attention from devs, and it has the potential to speed up things up
considerably: shouldn't we take care of this?

All the best.

- --
Paolo Cavallini - www.faunalia.eu
Corsi QGIS e PostGIS: http://www.faunalia.eu/training.html
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