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Date: Sat, 18 Jan 2014 14:23:51 -0500
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 <CALLqC1rc6mVG4PidAikv1StM9TZEfQcPgG5+g=HikbuP=Aks=g@mail.gmail.com>
Subject: Re: AddContractPoint /VIP
From: chandra Varahala <hadoopandcassandra@gmail.com>
To: user@cassandra.apache.org
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Thank you.

-Chandra


On Wed, Dec 11, 2013 at 9:06 PM, Aaron Morton <aaron@thelastpickle.com>wrot=
e:

> What is the good practice to put in the code as addContactPoint ie.,how
> many servers ?
>
> I use the same nodes as the seed list nodes for that DC.
>
> The idea of the seed list is that it=92s a list of well known nodes, and
> it=92s easier operationally to say we have one list of well known nodes t=
hat
> is used by the servers and the clients.
>
> 1) I am also thinking to put this way here   I am not sure this good or
> bad if i conigure       4 serves into one VIP ( virtual IP/virtual DNS)
> and specifying that DSN in the code as ContactPoint,  so that that VIP is
> smart enough to route to different nodes.
>
> Too complicated.
>
> 2) Is that problem if i use multiple Data centers in future ?
>
> You only need to give the client the local seeds, it will discover all th=
e
> nodes.
>
> Cheers
>
> -----------------
> Aaron Morton
> New Zealand
> @aaronmorton
>
> Co-Founder & Principal Consultant
> Apache Cassandra Consulting
> http://www.thelastpickle.com
>
> On 7/12/2013, at 7:12 am, chandra Varahala <hadoopandcassandra@gmail.com>
> wrote:
>
> Greetings,
>
> I have 4 node cassandra cluster that will grow upt to 10 nodes,we are
> using  CQL  Java client to access the  data.
> What is the good practice to put in the code as addContactPoint ie.,how
> many servers ?
>
> 1) I am also thinking to put this way here   I am not sure this good or
> bad if i conigure       4 serves into one VIP ( virtual IP/virtual DNS)
> and specifying that DSN in the code as ContactPoint,  so that that VIP is
> smart enough to route to different nodes.
>
> 2) Is that problem if i use multiple Data centers in future ?
>
>
> thanks
> Chandra
>
>
>

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<div dir=3D"ltr">Thank you.<div><br></div><div>-Chandra</div></div><div cla=
ss=3D"gmail_extra"><br><br><div class=3D"gmail_quote">On Wed, Dec 11, 2013 =
at 9:06 PM, Aaron Morton <span dir=3D"ltr">&lt;<a href=3D"mailto:aaron@thel=
astpickle.com" target=3D"_blank">aaron@thelastpickle.com</a>&gt;</span> wro=
te:<br>
<blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1p=
x #ccc solid;padding-left:1ex"><div style=3D"word-wrap:break-word"><div cla=
ss=3D"im"><blockquote type=3D"cite"><div dir=3D"ltr">What is the good pract=
ice to put in the code as addContactPoint ie.,how many servers ?</div>
</blockquote></div>I use the same nodes as the seed list nodes for that DC.=
=A0<div><br></div><div>The idea of the seed list is that it=92s a list of w=
ell known nodes, and it=92s easier operationally to say we have one list of=
 well known nodes that is used by the servers and the clients.=A0</div>
<div><br></div><div><div class=3D"im"><blockquote type=3D"cite"><div dir=3D=
"ltr"><div>1) I am also thinking to put this way here =A0 I am not sure thi=
s good or bad if i conigure =A0 =A0 =A0 4 serves into one VIP ( virtual IP/=
virtual DNS)</div>
<div>and specifying that DSN in the code as ContactPoint, =A0so that that V=
IP is smart enough to route to different nodes.</div></div></blockquote></d=
iv>Too complicated.=A0</div><div><br></div><div><div class=3D"im"><blockquo=
te type=3D"cite">
<div dir=3D"ltr">2) Is that problem if i use multiple Data centers in futur=
e ?</div></blockquote></div><div><div dir=3D"ltr">You only need to give the=
 client the local seeds, it will discover all the nodes.=A0</div></div><div=
 dir=3D"ltr">
<br></div><div dir=3D"ltr">Cheers</div><div dir=3D"ltr"><br></div><div>
<div style=3D"text-indent:0px;letter-spacing:normal;font-variant:normal;tex=
t-align:-webkit-auto;font-style:normal;font-weight:normal;line-height:norma=
l;text-transform:none;white-space:normal;font-family:Helvetica;word-wrap:br=
eak-word;word-spacing:0px">
<div>-----------------</div><div>Aaron Morton</div><div>New Zealand</div><d=
iv>@aaronmorton</div><div><br></div><div>Co-Founder &amp; Principal Consult=
ant</div><div>Apache Cassandra Consulting</div><div><a href=3D"http://www.t=
helastpickle.com" target=3D"_blank">http://www.thelastpickle.com</a></div>
</div>
</div><div><div class=3D"h5">
<br><div><div>On 7/12/2013, at 7:12 am, chandra Varahala &lt;<a href=3D"mai=
lto:hadoopandcassandra@gmail.com" target=3D"_blank">hadoopandcassandra@gmai=
l.com</a>&gt; wrote:</div><br><blockquote type=3D"cite"><div dir=3D"ltr"><d=
iv>
Greetings,</div><div><br></div><div>I have 4 node cassandra cluster that wi=
ll grow upt to 10 nodes,we are using =A0CQL =A0Java client to access the =
=A0data.</div><div>What is the good practice to put in the code as addConta=
ctPoint ie.,how many servers ?</div>

<div><br></div><div>1) I am also thinking to put this way here =A0 I am not=
 sure this good or bad if i conigure =A0 =A0 =A0 4 serves into one VIP ( vi=
rtual IP/virtual DNS)</div><div>and specifying that DSN in the code as Cont=
actPoint, =A0so that that VIP is smart enough to route to different nodes.<=
/div>

<div><br></div><div>2) Is that problem if i use multiple Data centers in fu=
ture ?</div><div><br></div><div><br></div><div>thanks</div><div>Chandra</di=
v></div>
</blockquote></div><br></div></div></div></div></blockquote></div><br></div=
>

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