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Date: Mon, 12 Oct 2015 11:16:59 +0100
Message-ID: 
 <CAEiXDZ0HcdX6ys6+Ym20DmjKbgNvfji0Qk39WnZaxT_i0O+7Uw@mail.gmail.com>
Subject: Re: Is replication possible with already existing data?
From: Carlos Alonso <info@mrcalonso.com>
To: user@cassandra.apache.org
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Yes Ajay, in your particular scenario, after all hints are delivered, both
CAS11 and CAS12 will have the exact same data.

Cheers!

Carlos Alonso | Software Engineer | @calonso <https://twitter.com/calonso>

On 11 October 2015 at 05:21, Ajay Garg <ajaygargnsit@gmail.com> wrote:

> Thanks a ton Anuja for the help !!!
>
> On Fri, Oct 9, 2015 at 12:38 PM, anuja jain <anujajain4@gmail.com> wrote:
> > Hi Ajay,
> >
> >
> > On Fri, Oct 9, 2015 at 9:00 AM, Ajay Garg <ajaygargnsit@gmail.com>
> wrote:
> >>
> > In this case, it will be the responsibility of APP1 to start connection
> to
> > CAS12. On the other hand if your APP1 is connecting to cassandra using
> Java
> > driver, you can add multiple contact points(CAS11 and CAS12 here) so
> that if
> > CAS11 is down it will directly connect to CAS12.
>
> Great .. Java-driver it will be :)
>
>
>
>
> >>
> > In such a case, CAS12 will store hints for the data to be stored on CAS11
> > (the tokens of which lies within the range of tokens CAS11 holds)  and
> > whenever CAS11 is up again, the hints will be transferred to it and the
> data
> > will be distributed evenly.
> >
>
> Evenly?
>
> Should not the data be """EXACTLY""" equal after CAS11 comes back up
> and the sync/transfer/whatever happens?
> After all, before CAS11 went down, CAS11 and CAS12 were replicating all
> data.
>
>
> Once again, thanks for your help.
> I will be even more grateful if you would help me clear the lingering
> doubt to second point.
>
>
> Thanks and Regards,
> Ajay
>

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<div dir=3D"ltr">Yes Ajay, in your particular scenario, after all hints are=
 delivered, both CAS11 and CAS12 will have the exact same data.<div><br></d=
iv><div>Cheers!</div></div><div class=3D"gmail_extra"><br clear=3D"all"><di=
v><div class=3D"gmail_signature"><div dir=3D"ltr"><span style=3D"font-size:=
12.8000001907349px">Carlos Alonso | Software Engineer |=C2=A0</span><a href=
=3D"https://twitter.com/calonso" style=3D"font-size:12.8000001907349px" tar=
get=3D"_blank">@calonso</a><br></div></div></div>
<br><div class=3D"gmail_quote">On 11 October 2015 at 05:21, Ajay Garg <span=
 dir=3D"ltr">&lt;<a href=3D"mailto:ajaygargnsit@gmail.com" target=3D"_blank=
">ajaygargnsit@gmail.com</a>&gt;</span> wrote:<br><blockquote class=3D"gmai=
l_quote" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left=
:1ex">Thanks a ton Anuja for the help !!!<br>
<span class=3D""><br>
On Fri, Oct 9, 2015 at 12:38 PM, anuja jain &lt;<a href=3D"mailto:anujajain=
4@gmail.com">anujajain4@gmail.com</a>&gt; wrote:<br>
&gt; Hi Ajay,<br>
&gt;<br>
&gt;<br>
&gt; On Fri, Oct 9, 2015 at 9:00 AM, Ajay Garg &lt;<a href=3D"mailto:ajayga=
rgnsit@gmail.com">ajaygargnsit@gmail.com</a>&gt; wrote:<br>
&gt;&gt;<br>
</span><span class=3D"">&gt; In this case, it will be the responsibility of=
 APP1 to start connection to<br>
&gt; CAS12. On the other hand if your APP1 is connecting to cassandra using=
 Java<br>
&gt; driver, you can add multiple contact points(CAS11 and CAS12 here) so t=
hat if<br>
&gt; CAS11 is down it will directly connect to CAS12.<br>
<br>
</span>Great .. Java-driver it will be :)<br>
<span class=3D""><br>
<br>
<br>
<br>
&gt;&gt;<br>
&gt; In such a case, CAS12 will store hints for the data to be stored on CA=
S11<br>
&gt; (the tokens of which lies within the range of tokens CAS11 holds)=C2=
=A0 and<br>
&gt; whenever CAS11 is up again, the hints will be transferred to it and th=
e data<br>
&gt; will be distributed evenly.<br>
&gt;<br>
<br>
</span>Evenly?<br>
<br>
Should not the data be &quot;&quot;&quot;EXACTLY&quot;&quot;&quot; equal af=
ter CAS11 comes back up<br>
and the sync/transfer/whatever happens?<br>
After all, before CAS11 went down, CAS11 and CAS12 were replicating all dat=
a.<br>
<br>
<br>
Once again, thanks for your help.<br>
I will be even more grateful if you would help me clear the lingering<br>
doubt to second point.<br>
<br>
<br>
Thanks and Regards,<br>
Ajay<br>
</blockquote></div><br></div>

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