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From: Tim Smith <Tim.Smith@Webtrends.com>
To: "user@cassandra.apache.org" <user@cassandra.apache.org>
Subject: RE: exporting data from Cassandra cluster
Thread-Topic: exporting data from Cassandra cluster
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Date: Wed, 7 Dec 2011 16:47:32 +0000
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Alex,

Is there a reason you don't just join new hardware to the cluster and then =
remove the old hardware from the cluster?  That would seem like the easiest=
 way to accomplish a hardware upgrade.

Tim Smith | noc administrator
O: +1 503.553.2554   M: 707.738.8132   TW: @tas50
webtrends<http://www.webtrends.com/> |  851 SW 6th Ave, Suite 1600, Portlan=
d, OR 97204
The Global Leader in Mobile and Social Analytics

From: Alexandru Dan Sicoe [mailto:sicoe.alexandru@googlemail.com]
Sent: Wednesday, December 07, 2011 8:18 AM
To: user@cassandra.apache.org
Subject: exporting data from Cassandra cluster

Hello everyone.
 3 node Cassandra 0.8.5 cluster. I've left the system running in production=
 environment for long term testing. I've accumulated about 350GB of data wi=
th RF=3D2. The machines I used for the tests are older and need to be repla=
ced. Because of this I need to export the data to a permanent location. How=
 should I export the data? In order to reduce the storage spac I want to ex=
port only the non-replicated data? I mean, just one copy of the data (witho=
ut the replicas). Is this possible? How?

Cheers,
Alexandru

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<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">Alex,<o:p></o:p></span></=
p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></span><=
/p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D">Is there a reason you don=
&#8217;t just join new hardware to the cluster and then remove the old hard=
ware from the cluster?&nbsp; That would seem like the easiest way to
 accomplish a hardware upgrade.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></span><=
/p>
<p class=3D"MsoNormal"><b><span style=3D"font-size:10.0pt;font-family:&quot=
;Calibri&quot;,&quot;sans-serif&quot;;color:#4C4F54">Tim Smith</span></b><s=
pan style=3D"font-size:9.0pt;font-family:&quot;Calibri&quot;,&quot;sans-ser=
if&quot;;color:#4C4F54">&nbsp;| noc administrator</span><span style=3D"font=
-size:10.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:b=
lack"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:9.0pt;font-family:&quot;Cal=
ibri&quot;,&quot;sans-serif&quot;;color:#4C4F54">O: &#43;1 503.553.2554 &nb=
sp; M: 707.738.8132 &nbsp; TW:</span><span style=3D"font-size:9.0pt;font-fa=
mily:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#47A0DB">&nbsp;</span=
><span style=3D"font-size:9.0pt;font-family:&quot;Calibri&quot;,&quot;sans-=
serif&quot;;color:#4C4F54">@tas50</span><span style=3D"font-size:10.5pt;fon=
t-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:black"><o:p></o:p=
></span></p>
<p class=3D"MsoNormal"><b><span style=3D"font-size:10.5pt;font-family:&quot=
;Calibri&quot;,&quot;sans-serif&quot;;color:#4C4F54"><a href=3D"http://www.=
webtrends.com/"><span style=3D"color:#47A0DB">webtrends</span></a></span></=
b><span style=3D"font-size:9.0pt;font-family:&quot;Calibri&quot;,&quot;sans=
-serif&quot;;color:#4C4F54">&nbsp;|&nbsp;</span><span style=3D"font-size:10=
.5pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:black">&n=
bsp;</span><span style=3D"font-size:9.0pt;font-family:&quot;Calibri&quot;,&=
quot;sans-serif&quot;;color:#4C4F54">851
 SW 6th Ave, Suite 1600, Portland, OR 97204</span><span style=3D"color:#1F4=
97D"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><b><span style=3D"font-size:9.0pt;font-family:&quot;=
Calibri&quot;,&quot;sans-serif&quot;;color:#4C4F54">The Global Leader in Mo=
bile and&nbsp;Social</span></b><span style=3D"font-size:10.5pt;font-family:=
&quot;Calibri&quot;,&quot;sans-serif&quot;;color:black">&nbsp;</span><b><sp=
an style=3D"font-size:9.0pt;font-family:&quot;Calibri&quot;,&quot;sans-seri=
f&quot;;color:#4C4F54">Analytics</span></b><span style=3D"color:#1F497D"><o=
:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></span><=
/p>
<p class=3D"MsoNormal"><b><span style=3D"font-size:10.0pt;font-family:&quot=
;Tahoma&quot;,&quot;sans-serif&quot;">From:</span></b><span style=3D"font-s=
ize:10.0pt;font-family:&quot;Tahoma&quot;,&quot;sans-serif&quot;"> Alexandr=
u Dan Sicoe [mailto:sicoe.alexandru@googlemail.com]
<br>
<b>Sent:</b> Wednesday, December 07, 2011 8:18 AM<br>
<b>To:</b> user@cassandra.apache.org<br>
<b>Subject:</b> exporting data from Cassandra cluster<o:p></o:p></span></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt">Hello everyone.<br>
&nbsp;3 node Cassandra 0.8.5 cluster. I've left the system running in produ=
ction environment for long term testing. I've accumulated about 350GB of da=
ta with RF=3D2. The machines I used for the tests are older and need to be =
replaced. Because of this I need to export
 the data to a permanent location. How should I export the data? In order t=
o reduce the storage spac I want to export only the non-replicated data? I =
mean, just one copy of the data (without the replicas). Is this possible? H=
ow?<br>
<br>
Cheers,<br>
Alexandru<o:p></o:p></p>
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