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From: Rodrigo Felix <rodrigofelixdealmeida@gmail.com>
Date: Sat, 6 Jul 2013 17:50:25 -0300
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 <CAD4g+KwHT6jOuL4j9v6+4dp2ZKc8dHQB_MmGCLgOkHUALBOAtA@mail.gmail.com>
Subject: General doubts about bootstrap
To: user@cassandra.apache.org
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Hi,

   I'm facing some problems and if you could help on some of them I'd thank
you.
   *Environment:* 2 seeds and 2 other nodes, all installed on m1.large EC2
instances. Each seed starts with about 1.7GB of data. Default cassandra
configuration.

   - Is it normal to take about 9 minutes to add a new node? Follows the
   log generated by a script to add a new node.

[06/07/2013 20:07:53] Remove all data stored in the Cassandra node
[06/07/2013 20:07:54] [OK] All data successfully removed
[06/07/2013 20:07:54] Setting seeds on cassandra.yml
[06/07/2013 20:07:54] [OK] seeds successfully set
[06/07/2013 20:07:54] Setting listen_address on cassandra.yml
[06/07/2013 20:07:54] [OK] listen_address successfully set
[06/07/2013 20:07:54] Setting initial_token on cassandra.yml
[06/07/2013 20:07:54] [OK] initial_token successfully set
*[06/07/2013 20:07:54] Starting cassandra...*
*[06/07/2013 20:16:36] [OK] Cassandra started*
[06/07/2013 20:16:37] Changing token of i-5cfc082f
[06/07/2013 20:18:00] [OK] Token of i-5cfc082f successfully set to
56713727820156410577229101238628035242
[06/07/2013 20:18:00] Cleaning up i-5cfc082f
[06/07/2013 20:20:13] Clean up of i-5cfc082f successfully finished
[06/07/2013 20:20:13] Machine added

   - Is there a way to reduce the time to start cassandra?
   - Sometimes cleanup operation takes make minutes (about 10). Is this
   normal since the amount of data is small (1.7gb at maximum / seed)?
   - Considering that I have two seeds in the beginning, their tokens are 0
   and 85070591730234615865843651857942052864. When I add a new machine, do=
 I
   need to execute move and cleanup on both seeds? Nowadays, I'm running
   cleanup on seed 0, move + cleanup on the other seed and neither move nor
   cleanup on the just added node. Is this OK?
   - What if I do not run cleanup in any existing node when adding or
   removing a node? Is the data that was not "cleaned up" still available i=
f I
   send a scan, for instance, and the scan range is still in the node but i=
t
   wouldn't be there if I had run cleanup? Data would be gather from other
   node, ie. the one that properly has the range specified in the scan quer=
y?
   - After decommissioning a node, is it advisable to run cleanup in the
   remaining nodes? The consequences of not to run are the same of not to r=
un
   when adding a node?

   Thank you very much in advance.

Att.

*Rodrigo Felix de Almeida*
LSBD - Universidade Federal do Cear=E1
Project Manager
MBA, CSM, CSPO, SCJP

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<div dir=3D"ltr"><div style>Hi,</div><div style><br></div><div style>=A0 =
=A0I&#39;m facing some problems and if you could help on some of them I&#39=
;d thank you.</div><div style>=A0 =A0<b>Environment:</b> 2 seeds and 2 othe=
r nodes, all installed on m1.large EC2 instances. Each seed starts with abo=
ut 1.7GB of data. Default cassandra configuration.</div>

<div style><ul style><li style>Is it normal to take about 9 minutes to add =
a new node? Follows the log generated by a script to add a new node.<br></l=
i></ul><div><div>[06/07/2013 20:07:53] Remove all data stored in the Cassan=
dra node</div>

<div>[06/07/2013 20:07:54] [OK] All data successfully removed</div><div>[06=
/07/2013 20:07:54] Setting seeds on cassandra.yml</div><div>[06/07/2013 20:=
07:54] [OK] seeds successfully set</div><div>[06/07/2013 20:07:54] Setting =
listen_address on cassandra.yml</div>

<div>[06/07/2013 20:07:54] [OK] listen_address successfully set</div><div>[=
06/07/2013 20:07:54] Setting initial_token on cassandra.yml</div><div>[06/0=
7/2013 20:07:54] [OK] initial_token successfully set</div><div><b>[06/07/20=
13 20:07:54] Starting cassandra...</b></div>

<div><b>[06/07/2013 20:16:36] [OK] Cassandra started</b></div><div>[06/07/2=
013 20:16:37] Changing token of i-5cfc082f</div><div>[06/07/2013 20:18:00] =
[OK] Token of i-5cfc082f successfully set to 567137278201564105772291012386=
28035242</div>

<div>[06/07/2013 20:18:00] Cleaning up i-5cfc082f</div><div>[06/07/2013 20:=
20:13] Clean up of i-5cfc082f successfully finished</div><div>[06/07/2013 2=
0:20:13] Machine added</div></div></div><ul style><li style>Is there a way =
to reduce the time to start cassandra?</li>

<li style>Sometimes cleanup operation takes make minutes (about 10). Is thi=
s normal since the amount of data is small (1.7gb at maximum / seed)?</li><=
li style>Considering that I have two seeds in the beginning, their tokens a=
re 0 and=A085070591730234615865843651857942052864. When I add a new machine=
, do I need to execute move and cleanup on both seeds? Nowadays, I&#39;m ru=
nning cleanup on seed 0, move + cleanup on the other seed and neither move =
nor cleanup on the just added node. Is this OK?</li>

<li style>What if I do not run cleanup in any existing node when adding or =
removing a node? Is the data that was not &quot;cleaned up&quot; still avai=
lable if I send a scan, for instance, and the scan range is still in the no=
de but it wouldn&#39;t be there if I had run cleanup? Data would be gather =
from other node, ie. the one that properly has the range specified in the s=
can query?</li>

<li style>After decommissioning a node, is it advisable to run cleanup in t=
he remaining nodes? The consequences of not to run are the same of not to r=
un when adding a node?</li></ul><div style>=A0 =A0Thank you very much in ad=
vance.</div>

<div style><br></div><div>Att.<br><br><b>Rodrigo Felix de Almeida</b><br>LS=
BD - Universidade Federal do Cear=E1<br>Project Manager<br>MBA, CSM, CSPO, =
SCJP<br></div>
</div>

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