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Date: Tue, 5 Aug 2014 11:56:07 +0100
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 <CAA-p0HoAet5z_jW1vODe2QqAbpjAhP-60cH_2njxqw=LoZ==kA@mail.gmail.com>
Subject: Re: Make an existing cluster multi data-center compatible.
From: Mark Reddy <mark.reddy@boxever.com>
To: user@cassandra.apache.org
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Yes, you must run a full repair for the reasons stated in the yaml file.


Mark


On Tue, Aug 5, 2014 at 11:52 AM, Rene Kochen <rene.kochen@schange.com>
wrote:

> Hi all,
>
> I want to add a data-center to an existing single data-center cluster.
> First I have to make the existing cluster multi data-center compatible.
>
> The existing cluster is a 12 node cluster with:
> - Replication factor = 3
> - Placement strategy = SimpleStrategy
> - Endpoint snitch = SimpleSnitch
>
> If I change the following:
> - Placement strategy = NetworkTopologyStrategy
> - Endpoint snitch = PropertyFileSnitch -> all 12 nodes in this file belong
> to the same data-center and rack.
>
> Do I have to run full repairs after this change? Because the yaml file
> states: IF YOU CHANGE THE SNITCH AFTER DATA IS INSERTED INTO THE CLUSTER,
> YOU MUST RUN A FULL REPAIR, SINCE THE SNITCH AFFECTS WHERE REPLICAS ARE
> PLACED.
>
> Thanks!
>
> Rene
>
>
>

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<div dir=3D"ltr">Yes, you must run a full repair for the reasons stated in =
the yaml file.<div><br></div><div><br></div><div>Mark</div></div><div class=
=3D"gmail_extra"><br><br><div class=3D"gmail_quote">On Tue, Aug 5, 2014 at =
11:52 AM, Rene Kochen <span dir=3D"ltr">&lt;<a href=3D"mailto:rene.kochen@s=
change.com" target=3D"_blank">rene.kochen@schange.com</a>&gt;</span> wrote:=
<br>
<blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1p=
x #ccc solid;padding-left:1ex"><div dir=3D"ltr">Hi all,<br><br>I want to ad=
d a data-center to an existing single data-center cluster. First I have to =
make the existing cluster multi data-center compatible.<br>
<br>The existing cluster is a 12 node cluster with:<br>
- Replication factor =3D 3<br>- Placement strategy =3D SimpleStrategy<br>- =
Endpoint snitch =3D SimpleSnitch<br><br>If I change the following:<br>- Pla=
cement strategy =3D NetworkTopologyStrategy<br>- Endpoint snitch =3D Proper=
tyFileSnitch -&gt; all 12 nodes in this file belong to the same data-center=
 and rack.<br>

<br>Do I have to run full repairs after this change? Because the yaml file =
states: IF YOU CHANGE THE SNITCH AFTER DATA IS INSERTED INTO THE CLUSTER, Y=
OU MUST RUN A FULL REPAIR, SINCE THE SNITCH AFFECTS WHERE REPLICAS ARE PLAC=
ED.<br>

<br>Thanks!<span class=3D"HOEnZb"><font color=3D"#888888"><br><br>Rene<br><=
br><br></font></span></div>
</blockquote></div><br></div>

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