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From: Alain RODRIGUEZ <arodrime@gmail.com>
Date: Thu, 6 Aug 2015 22:31:23 +0200
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 <CA+VSrLoJCvkJrBxQOZfHmS0zL206GrvTnyb5rb5uU2zzEwb3tQ@mail.gmail.com>
Subject: Re: Duplicating a cluster with different # of disks
To: user@cassandra.apache.org
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Hi Gerard,

You should probably add a new datacenter following this procedure :
http://docs.datastax.com/en/cassandra/2.1/cassandra/operations/ops_add_dc_to_cluster_t.html

You will just have to make sure to configure all the nodes of the new nodes
to use mnt + mnt2 instead of mnt + mnt2 + mnt3.

Make sure to have enough space (disks / nodes) to handle your whole set of
data in the keyspace you want to load and it should be ok.

I think that this is the easiest approach, you don't need to care about
SSTable at all, Cassandra does it for you.

C*heers,

Alain

2015-08-06 18:50 GMT+02:00 Gerard Maas <gerard.maas@gmail.com>:

> Hi,
>
> I'm currently trying to duplicate a given keyspace on a new cluster to run
> some analytics on it.
>
> My source cluster has 3 disks and corresponding data directories (mnt,
> mnt2, mnt3) but the machines in my target cluster only have 2 disks (mnt,
> mnt2).
>
> What should be the correct procedure to copy the sstable data  from source
> to destination in this case?
>
> -kr, Gerard.
>

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<div dir=3D"ltr">Hi Gerard,<div><br></div><div>You should probably add a ne=
w datacenter following this procedure :=C2=A0<a href=3D"http://docs.datasta=
x.com/en/cassandra/2.1/cassandra/operations/ops_add_dc_to_cluster_t.html">h=
ttp://docs.datastax.com/en/cassandra/2.1/cassandra/operations/ops_add_dc_to=
_cluster_t.html</a></div><div><br></div><div>You will just have to make sur=
e to configure all the nodes of the new nodes to use=C2=A0<span style=3D"fo=
nt-size:12.8000001907349px">mnt + mnt2 instead of=C2=A0</span><span style=
=3D"font-size:12.8000001907349px">mnt + mnt2 + mnt3.</span></div><div><span=
 style=3D"font-size:12.8000001907349px"><br></span></div><div><span style=
=3D"font-size:12.8000001907349px">Make sure to have enough space (disks / n=
odes) to handle your whole set of data in the keyspace you want to load and=
 it should be ok.</span></div><div><span style=3D"font-size:12.800000190734=
9px"><br></span></div><div><span style=3D"font-size:12.8000001907349px">I t=
hink that this is the easiest approach, you don&#39;t need to care about SS=
Table at all, Cassandra does it for you.</span></div><div><span style=3D"fo=
nt-size:12.8000001907349px"><br></span></div><div><span style=3D"font-size:=
12.8000001907349px">C*heers,</span></div><div><span style=3D"font-size:12.8=
000001907349px"><br></span></div><div><span style=3D"font-size:12.800000190=
7349px">Alain</span></div></div><div class=3D"gmail_extra"><br><div class=
=3D"gmail_quote">2015-08-06 18:50 GMT+02:00 Gerard Maas <span dir=3D"ltr">&=
lt;<a href=3D"mailto:gerard.maas@gmail.com" target=3D"_blank">gerard.maas@g=
mail.com</a>&gt;</span>:<br><blockquote class=3D"gmail_quote" style=3D"marg=
in:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir=3D"ltr"=
>Hi,<div><br></div><div>I&#39;m currently trying to duplicate a given keysp=
ace on a new cluster to run some analytics on it.</div><div><br></div><div>=
My source cluster has 3 disks and corresponding data directories (mnt, mnt2=
, mnt3) but the machines in my target cluster only have 2 disks (mnt, mnt2)=
.</div><div><br></div><div>What should be the correct procedure to copy the=
 sstable data =C2=A0from source to destination in this case?</div><div><br>=
</div><div>-kr, Gerard.<br></div></div>
</blockquote></div><br></div>

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