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From: Aaron Morton <aaron@thelastpickle.com>
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Subject: Re: AddContractPoint /VIP
Date: Thu, 12 Dec 2013 15:06:18 +1300
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 <CALLqC1ojBTCXpTvQ-GZYgwaKwUK-jdh1GbJizKFgtbzV3qMZsg@mail.gmail.com>
To: Cassandra User <user@cassandra.apache.org>
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 <CALLqC1ojBTCXpTvQ-GZYgwaKwUK-jdh1GbJizKFgtbzV3qMZsg@mail.gmail.com>


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> 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.=20

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 =
that is used by the servers and the clients.=20

> 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.=20

> 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 =
the nodes.=20

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,
>=20
> 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 ?
>=20
> 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.
>=20
> 2) Is that problem if i use multiple Data centers in future ?
>=20
>=20
> thanks
> Chandra


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<html><head><meta http-equiv=3D"Content-Type" content=3D"text/html =
charset=3Dwindows-1252"></head><body style=3D"word-wrap: break-word; =
-webkit-nbsp-mode: space; -webkit-line-break: =
after-white-space;"><blockquote type=3D"cite"><div dir=3D"ltr">What is =
the good practice to put in the code as addContactPoint ie.,how many =
servers ?</div></blockquote>I use the same nodes as the seed list nodes =
for that DC.&nbsp;<div><br></div><div>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 that is used by the servers and =
the clients.&nbsp;</div><div><br></div><div><blockquote type=3D"cite"><div=
 dir=3D"ltr"><div>1) I am also thinking to put this way here &nbsp; I am =
not sure this good or bad if i conigure &nbsp; &nbsp; &nbsp; 4 serves =
into one VIP ( virtual IP/virtual DNS)</div><div>and specifying that DSN =
in the code as ContactPoint, &nbsp;so that that VIP is smart enough to =
route to different nodes.</div></div></blockquote>Too =
complicated.&nbsp;</div><div><br></div><div><blockquote type=3D"cite"><div=
 dir=3D"ltr">2) Is that problem if i use multiple Data centers in future =
?</div></blockquote><div><div dir=3D"ltr">You only need to give the =
client the local seeds, it will discover all the =
nodes.&nbsp;</div></div><div dir=3D"ltr"><br></div><div =
dir=3D"ltr">Cheers</div><div dir=3D"ltr"><br></div><div =
apple-content-edited=3D"true">
<div style=3D"color: rgb(0, 0, 0); font-family: Helvetica;  font-style: =
normal; font-variant: normal; font-weight: normal; letter-spacing: =
normal; line-height: normal; orphans: 2; text-align: -webkit-auto; =
text-indent: 0px; text-transform: none; white-space: normal; widows: 2; =
word-spacing: 0px; -webkit-text-size-adjust: auto; =
-webkit-text-stroke-width: 0px; word-wrap: break-word; =
-webkit-nbsp-mode: space; -webkit-line-break: after-white-space; =
"><div>-----------------</div><div>Aaron Morton</div><div>New =
Zealand</div><div>@aaronmorton</div><div><br></div><div>Co-Founder &amp; =
Principal Consultant</div><div>Apache Cassandra Consulting</div><div><a =
href=3D"http://www.thelastpickle.com">http://www.thelastpickle.com</a></di=
v></div>
</div>
<br><div><div>On 7/12/2013, at 7:12 am, chandra Varahala &lt;<a =
href=3D"mailto:hadoopandcassandra@gmail.com">hadoopandcassandra@gmail.com<=
/a>&gt; wrote:</div><br class=3D"Apple-interchange-newline"><blockquote =
type=3D"cite"><div dir=3D"ltr"><div>Greetings,</div><div><br></div><div>I =
have 4 node cassandra cluster that will grow upt to 10 nodes,we are =
using &nbsp;CQL &nbsp;Java client to access the =
&nbsp;data.</div><div>What is the good practice to put in the code as =
addContactPoint ie.,how many servers ?</div>
<div><br></div><div>1) I am also thinking to put this way here &nbsp; I =
am not sure this good or bad if i conigure &nbsp; &nbsp; &nbsp; 4 serves =
into one VIP ( virtual IP/virtual DNS)</div><div>and specifying that DSN =
in the code as ContactPoint, &nbsp;so 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 =
future =
?</div><div><br></div><div><br></div><div>thanks</div><div>Chandra</div></=
div>
</blockquote></div><br></div></body></html>=

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