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From: Rahul Bhattacharjee <rahul.rec.dgp@gmail.com>
Date: Thu, 5 Sep 2013 20:33:48 +0530
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 <CAO7hTbOLbkd1ybVJ6GmZRy23380zWiQL-id_pzDaYGtKP=pPJg@mail.gmail.com>
Subject: Question related to resource allocation in Yarn!
To: "user@hadoop.apache.org" <user@hadoop.apache.org>
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Hi,

I am trying to make a small poc on top of yarn.

Within the launched application master , I am trying to request for 50
containers and launch  a same task on those allocated containers.

My config : AM registration response minimumCapability {, memory: 1024,
virtual_cores: 1, }, maximumCapability {, memory: 8192, virtual_cores: 32,
},

1) I am asking for 1G mem and 1 core container to the RM. Ideally the RM
should return me 6 - 7 containers , but the response always returns with
only 2 containers.

Why is that ?

2) So , when in the first ask 2 containers are returned , then I again
required the RM for 50 - 2 = 48 containers. I keep getting 0 containers ,
even if the previously started containers have finished.

Why is that ?

Any link explaining the allocate request of RM would be very helpful.

Thanks,
Rahul

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Content-Type: text/html; charset=UTF-8
Content-Transfer-Encoding: quoted-printable

<div dir=3D"ltr"><div class=3D"gmail_default" style=3D"font-family:georgia,=
serif">Hi,<br><br></div><div class=3D"gmail_default" style=3D"font-family:g=
eorgia,serif">I am trying to make a small poc on top of yarn.<br><br></div>=
<div class=3D"gmail_default" style=3D"font-family:georgia,serif">

Within the launched application master , I am trying to request for 50 cont=
ainers and launch=C2=A0 a same task on those allocated containers.<br><br><=
/div><div class=3D"gmail_default" style=3D"font-family:georgia,serif">My co=
nfig : AM registration response minimumCapability {, memory: 1024, virtual_=
cores: 1, }, maximumCapability {, memory: 8192, virtual_cores: 32, }, <br>

<br></div><div class=3D"gmail_default" style=3D"font-family:georgia,serif">=
1) I am asking for 1G mem and 1 core container to the RM. Ideally the RM sh=
ould return me 6 - 7 containers , but the response always returns with only=
 2 containers. <br>

<br></div><div class=3D"gmail_default" style=3D"font-family:georgia,serif">=
Why is that ?<br><br></div><div class=3D"gmail_default" style=3D"font-famil=
y:georgia,serif">2) So , when in the first ask 2 containers are returned , =
then I again required the RM for 50 - 2 =3D 48 containers. I keep getting 0=
 containers , even if the previously started containers have finished.<br>

<br></div><div class=3D"gmail_default" style=3D"font-family:georgia,serif">=
Why is that ?<br><br></div><div class=3D"gmail_default" style=3D"font-famil=
y:georgia,serif">Any link explaining the allocate request of RM would be ve=
ry helpful.<br>

</div><div class=3D"gmail_default" style=3D"font-family:georgia,serif"><br>=
</div><div class=3D"gmail_default" style=3D"font-family:georgia,serif">Than=
ks,<br>Rahul<br></div></div>

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