[Koha-devel] plack in production

[Gaetan Boisson]

So, we applied Dobrica's patch on bug 13815, and this solved pretty much 
all of our problems. We'll be doing some more testing, but it turns out 
it was very much encoding related. (I guess Robin's catalog is in 
english language and didn't have this issue.)

I realize there's one thing i didn't mention in my message: we are 
testing plack for the staff interface, i am much more confident for the 
opac indeed. (So much so that we didn't even test the opac! I guess we 
should...)

Another thing i didn't mention in my original email is that we found bad 
.po files can cause plack to crash: if your translated string doesn't 
have the same number of %s as the original, this will result in a badly 
formated template, which will crash plack. (e.g. an if tag that is never 
closed.) Somehow this doesn't induce a crash when plack is not enabled.
  I had always thought that if the %s count for a string was wrong, the 
translation engine would leave the original string. It seems it's more 
complicated than this.

Anyway, we'll be doing more tests and i'll keep you posted about our 
findings!


Le 20/04/2015 00:12, Robin Sheat a écrit :
> Gaetan Boisson schreef op do 26-03-2015 om 16:17 [+0100]:
>> we have been talking about plack quite a lot in the last hackfest, and
>> i
>> must say i am not that comfortable with the technical aspects and
>> hardly
>> understand what the issues are, but...
> I apparently missed this message when it was first posted.
>
> Anyway, we have a plack system in production. I'd link you to it, but
> it's closed and so it'll do you no good.
>
> It is really speedy though. In this case it's needed because this
> library sends out monthly newsletters to its members who then all
> descend on the OPAC en masse, which in the pre-plack days would make it
> OOM or at least just give up responding. However with plack, it serves
> the responses fast enough that it can handle the high load with a lot
> more success.
>
> The script I use to convert a package install to use plack is here:
>
> http://git.catalyst.net.nz/gw?p=koha-plack.git
>
> One of these days I'll probably make a branch of Koha that includes
> plack support by default in the packages, or make a package that
> provides the appropriate diverts to switch everything on that machine to
> plack, I haven't decided which way to go yet.
>
> We do have a few minor issues, but nothing as severe as what you're
> talking about.
>
> The main problem is that user separation makes memory allocation tricky
> as you need to pre-allocate per koha instance, which is a bit much. At
> the same time, we don't want to risk giving the process read access to
> every koha-conf.xml as that's dangerous. We do have a solution for this
> (it's weird, but it'll do), I just haven't had a chance to tie it in.
>
>
>
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-- 
Gaetan Boisson
Chef de projet bibliothécaire
BibLibre
06 52 42 51 29
108 avenue Breteuil 13006 Marseille
gaetan.boisson at biblibre.com

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