share a var between workers - psgi-plack

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Message from discussion share a var between workers
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Date: Fri, 17 Aug 2012 13:49:30 -0300
Message-ID: <CAMGJnyubZKuPnxPyAGTzM0u0u+6ptdXsWCOGtiScwr6zYki...@mail.gmail.com>
Subject: Re: share a var between workers
From: Nuba Princigalli <n...@pauleira.com>
To: psgi-plack@googlegroups.com
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Hi Arjan,

Redis' been my "shared-memory of choice" for quite some time, might want to
check it out:
* simple case http://redis.io/commands/incr
* with the counter in a hash http://redis.io/commands/hincrby

Have fun,

Nuba

On Fri, Aug 17, 2012 at 1:41 PM, Tatsuhiko Miyagawa <miyag...@gmail.com>wrote:

> On Aug 17, 2012, at 6:04 AM, arjan wrote:
>
> If I use Starman with this code:
>
>    my $counter = 0;
>
>    my $app = sub {
>        my $senv        = shift;
>        $counter++;
>        return [ 200, [ 'Content-Type' => 'text/html' ], [ "counter:
> $counter" ] ];
>    };
>
> Each worker gets it's own copy of $counter. The value of $counter depends
> on the worker serving the request.
>
> Would it be somehow possible to share a variable between workers?
>
>
> use memcache or some other shared memory mechanism.
>
>
>  --
>
>
>
>

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<div>Hi Arjan,</div><div><br></div><div>Redis&#39; been my &quot;shared-mem=
ory of choice&quot; for quite some time, might want to check it out:</div><=
div><div><div>* simple case <a href=3D"http://redis.io/commands/incr">http:=
//redis.io/commands/incr</a></div>
<div>* with the counter in a hash <a href=3D"http://redis.io/commands/hincr=
by">http://redis.io/commands/hincrby</a></div><div><div><br></div><div>Have=
 fun,</div><div><br></div><div>Nuba</div><div><br><div class=3D"gmail_quote=
">
On Fri, Aug 17, 2012 at 1:41 PM, Tatsuhiko Miyagawa <span dir=3D"ltr">&lt;<=
a href=3D"mailto:miyag...@gmail.com" target=3D"_blank">miyag...@gmail.com</=
a>&gt;</span> wrote:<br><blockquote class=3D"gmail_quote" style=3D"margin:0=
 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div style=3D"word-wrap:break-word"><div><div class=3D"h5"><div><span style=
=3D"text-indent:0px;letter-spacing:normal;font-variant:normal;text-align:-w=
ebkit-auto;font-style:normal;font-weight:normal;line-height:normal;border-c=
ollapse:separate;text-transform:none;font-size:medium;white-space:normal;fo=
nt-family:Helvetica;word-spacing:0px"><span style=3D"text-indent:0px;letter=
-spacing:normal;font-variant:normal;text-align:-webkit-auto;font-style:norm=
al;font-weight:normal;line-height:normal;border-collapse:separate;text-tran=
sform:none;font-size:medium;white-space:normal;font-family:Helvetica;word-s=
pacing:0px"><div style=3D"word-wrap:break-word">
<span style=3D"text-indent:0px;letter-spacing:normal;font-variant:normal;te=
xt-align:-webkit-auto;font-style:normal;font-weight:normal;line-height:norm=
al;border-collapse:separate;text-transform:none;font-size:medium;white-spac=
e:normal;font-family:Helvetica;word-spacing:0px"><span style=3D"text-indent=
:0px;letter-spacing:normal;font-variant:normal;text-align:-webkit-auto;font=
-style:normal;font-weight:normal;line-height:normal;border-collapse:separat=
e;text-transform:none;font-size:medium;white-space:normal;font-family:Helve=
tica;word-spacing:0px"><div style=3D"word-wrap:break-word">
<span style=3D"text-indent:0px;letter-spacing:normal;font-variant:normal;te=
xt-align:-webkit-auto;font-style:normal;font-weight:normal;line-height:norm=
al;border-collapse:separate;text-transform:none;font-size:medium;white-spac=
e:normal;font-family:Helvetica;word-spacing:0px"><div style=3D"word-wrap:br=
eak-word">
<span style=3D"text-indent:0px;letter-spacing:normal;font-variant:normal;te=
xt-align:-webkit-auto;font-style:normal;font-weight:normal;line-height:norm=
al;border-collapse:separate;text-transform:none;font-size:medium;white-spac=
e:normal;font-family:Helvetica;word-spacing:0px"><div style=3D"word-wrap:br=
eak-word">
<span style=3D"text-indent:0px;letter-spacing:normal;font-variant:normal;te=
xt-align:-webkit-auto;font-style:normal;font-weight:normal;line-height:norm=
al;border-collapse:separate;text-transform:none;font-size:medium;white-spac=
e:normal;font-family:Helvetica;word-spacing:0px"><div style=3D"word-wrap:br=
eak-word">
<div>On Aug 17, 2012, at 6:04 AM, arjan wrote:</div></div></span></div></sp=
an></div></span></div></span></span></div></span></span></div></div></div><=
div><div><div class=3D"h5"><br><blockquote type=3D"cite"><div>If I use Star=
man with this code:<br>
<br> =A0=A0=A0my $counter =3D 0;<br><br> =A0=A0=A0my $app =3D sub {<br> =A0=
=A0=A0=A0=A0=A0=A0my $senv =A0=A0=A0=A0=A0=A0=A0=3D shift;<br> =A0=A0=A0=A0=
=A0=A0=A0$counter++; =A0=A0=A0<br> =A0=A0=A0=A0=A0=A0=A0return [ 200, [ &#3=
9;Content-Type&#39; =3D&gt; &#39;text/html&#39; ], [ &quot;counter: $counte=
r&quot; ] ];<br>
 =A0=A0=A0};<br><br>Each worker gets it&#39;s own copy of $counter. The val=
ue of $counter depends on the worker serving the request. <br><br>Would it =
be somehow possible to share a variable between workers?<br></div></blockqu=
ote>
<div><br></div></div></div><div>use memcache or some other shared memory me=
chanism.</div></div><span class=3D"HOEnZb"><font color=3D"#888888"><br><div=
><br></div></font></span></div><span class=3D"HOEnZb"><font color=3D"#88888=
8">

<p></p>

-- <br>
=A0<br>
=A0<br>
=A0<br>
</font></span></blockquote></div><br></div></div></div></div>

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