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From: =?UTF-8?Q?Jos=C3=A9_Luis_Larroque?= <larroquester@gmail.com>
Date: Sat, 4 Feb 2017 15:33:26 -0300
Message-ID: <CALWHDezFh3wu1ycDYSG=2NJEUTsLwT=gBavNsvo844V54HMPQw@mail.gmail.com>
Subject: Re: Return a value from Giraph master superstep
To: user@giraph.apache.org
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archived-at: Sat, 04 Feb 2017 18:34:01 -0000

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Hi Saliya,

GiraphRunner.run gives you an *int* result, and that result it's different
depending of your last superstep execution. It will give 0 in a
successfully execution and a error value otherwise. Those values can't be
changed but maybe you should save your last superstep custom result in hdfs
for example, and try to keep things simple instead of changing Giraph code.

Just a idea.
Bye!

--=20
*Jos=C3=A9 Luis Larroque*
Analista Programador Universitario - Facultad de Inform=C3=A1tica - UNLP
Desarrollador Java  en LIFIA

2017-02-04 14:21 GMT-03:00 Saliya Ekanayake <esaliya@gmail.com>:

> Hi,
>
> I am developing a graph algorithm where I need to do N invocations of
> giraph. Each invocation will run some M number of supersteps. I need to
> return a value from the last super step back to the main method before
> invoking giraph. How can I do this?
>
> For example, I have,
>
> main(){
>
>     for (int i =3D 0; i < N; ++i){
>         // Create giraph conf
>         // Create new Giraph runner
>         ToolRunner.run(runner, ...)
>
>         // I need to return a value here from this invocation.
>     }
>
> --
> Saliya Ekanayake, Ph.D
> Applied Computer Scientist
> Network Dynamics and Simulation Science Laboratory (NDSSL)
> Virginia Tech, Blacksburg
>
>

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<div dir=3D"ltr"><div>Hi Saliya,</div><div><br></div>GiraphRunner.run gives=
 you an <b>int</b>=C2=A0result, and that result it&#39;s different dependin=
g of your last superstep execution. It will give 0 in a successfully execut=
ion and a error value otherwise. Those values can&#39;t be changed but mayb=
e you should save your last superstep custom result in hdfs for example, an=
d try to keep things simple instead of changing Giraph code.<div><br></div>=
<div>Just a idea.</div><div>Bye!</div></div><div class=3D"gmail_extra"><br =
clear=3D"all"><div><div class=3D"gmail_signature" data-smartmail=3D"gmail_s=
ignature"><div dir=3D"ltr"><span style=3D"color:rgb(136,136,136);font-size:=
12.8px">--=C2=A0</span><br style=3D"color:rgb(136,136,136);font-size:12.8px=
"><div style=3D"color:rgb(136,136,136);font-size:12.8px"><div dir=3D"ltr"><=
font color=3D"#888888" face=3D"arial" size=3D"1"><b>Jos=C3=A9 Luis Larroque=
</b></font><br style=3D"font-size:x-small;font-family:arial"><span style=3D=
"font-size:x-small;font-family:arial">Analista Programador Universitario - =
Facultad de Inform=C3=A1tica - UNLP</span><br style=3D"font-size:x-small;fo=
nt-family:arial"><span style=3D"font-size:x-small;font-family:arial">Desarr=
ollador Java =C2=A0en LIFIA</span></div></div></div></div></div>
<br><div class=3D"gmail_quote">2017-02-04 14:21 GMT-03:00 Saliya Ekanayake =
<span dir=3D"ltr">&lt;<a href=3D"mailto:esaliya@gmail.com" target=3D"_blank=
">esaliya@gmail.com</a>&gt;</span>:<br><blockquote class=3D"gmail_quote" st=
yle=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div =
dir=3D"ltr">Hi,<div><br></div><div>I am developing a graph algorithm where =
I need to do N invocations of giraph. Each invocation will run some M numbe=
r of supersteps. I need to return a value from the last super step back to =
the main method before invoking giraph. How can I do this?</div><div><br></=
div><div>For example, I have,</div><div><br></div><div>main(){</div><div><b=
r></div><div>=C2=A0 =C2=A0 for (int i =3D 0; i &lt; N; ++i){</div><div>=C2=
=A0 =C2=A0 =C2=A0 =C2=A0 // Create giraph conf</div><div>=C2=A0 =C2=A0 =C2=
=A0 =C2=A0 // Create new Giraph runner</div><div>=C2=A0 =C2=A0 =C2=A0 =C2=
=A0 ToolRunner.run(runner, ...)</div><div>=C2=A0 =C2=A0 =C2=A0 =C2=A0</div>=
<div>=C2=A0 =C2=A0 =C2=A0 =C2=A0 // I need to return a value here from this=
 invocation.</div><div>=C2=A0 =C2=A0 }<span class=3D"HOEnZb"><font color=3D=
"#888888"><br clear=3D"all"><div><br></div>-- <br><div class=3D"m_879504382=
3850825197gmail_signature" data-smartmail=3D"gmail_signature"><div dir=3D"l=
tr"><div><div dir=3D"ltr"><div dir=3D"ltr"><div dir=3D"ltr"><div dir=3D"ltr=
"><div dir=3D"ltr"><div dir=3D"ltr" style=3D"font-size:12.8px"><div dir=3D"=
ltr" style=3D"font-size:12.8px"><font color=3D"#000000">Saliya Ekanayake, P=
h.D</font></div><div dir=3D"ltr" style=3D"font-size:12.8px"><font color=3D"=
#000000">Applied Computer Scientist</font></div><div dir=3D"ltr" style=3D"f=
ont-size:12.8px"><font color=3D"#000000">Network Dynamics and Simulation Sc=
ience Laboratory (NDSSL)</font></div><div dir=3D"ltr" style=3D"font-size:12=
.8px"><span style=3D"color:rgb(0,0,0);font-size:12.8px">Virginia Tech, Blac=
ksburg</span><br></div></div></div><div dir=3D"ltr"><br><font color=3D"#888=
888"></font></div></div></div></div></div></div></div></div>
</font></span></div></div>
</blockquote></div><br></div>

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