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Subject: Re: Initial token - newbie question (version 1.0.8)
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From: Watanabe Maki <watanabe.maki@gmail.com>
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Date: Thu, 12 Apr 2012 07:39:59 +0900
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auto_bootstrap parameter has been removed and always enabled since 1.0.

maki


On 2012/04/12, at 6:10, Paolo Bernardi <bernarpa@gmail.com> wrote:

> I think that setting auto_bootstrap =3D true or false into cassandra.yaml i=
s enough (if it isn't there already just add it, for example, after initial_=
token)
>=20
> Paolo
>=20
> On Apr 11, 2012 10:34 PM, "Jay Parashar" <jparashar@itscape.com> wrote:
> Thanks a lot Jeremiah.
> Also would you be able to tell me where to  configure the auto_bootstrap
> parameter in version 1.0.8?
>=20
> Thanks
> Jay
>=20
> -----Original Message-----
> From: Jeremiah Jordan [mailto:JEREMIAH.JORDAN@morningstar.com]
> Sent: Wednesday, April 11, 2012 3:03 PM
> To: user@cassandra.apache.org
> Subject: RE: Initial token - newbie question (version 1.0.8)
>=20
> You have to use nodetool move to change the token after the node has start=
ed
> the first time.  The value in the config file is only used on first startu=
p.
>=20
> Unless you were using RF=3D3 on your 3 node ring, you can't just start wit=
h a
> new token without using nodetool.  You have to do move so that the data ge=
ts
> put in the right place.
>=20
> How you would do it with out nodetool:
> Dangerous, not smart, can easily shoot yourself in the foot and lose your
> data way, if you were RF =3D 3:
> If you used RF=3D3, then all nodes should have all data, and you can stop a=
ll
> nodes, remove the system keyspace data, and start up the new cluster with
> the right stuff in the yaml file (blowing away system means this is like
> starting a brand new cluster).  Then re-create all of your keyspaces/colum=
n
> families and they will pick up the already existing data.
>=20
> Though, if you are rf=3D3, nodetool move shouldn't be moving anything anyw=
ay,
> so you should just do it the right way and use nodetool.
>=20
> ________________________________________
> From: Jay Parashar [jparashar@itscape.com]
> Sent: Wednesday, April 11, 2012 1:44 PM
> To: user@cassandra.apache.org
> Subject: Initial token - newbie question (version 1.0.8)
>=20
> I created a 3 node ring with the intial_token blank. Of course as expected=
,
> Cassandra generated its own tokens on startup (e.g. tokens X, Y and Z) The=

> nodes or course were not properly balanced, so I did the following steps
>=20
>        1)  stopped all the 3 nodes
>        2) assigned initial_tokens (A, B, C) respectively
>        3) Restarted the nodes
>=20
> What I find if that the node were still using the original tokens (X, Y an=
d
> Z). Log messages say for node 1 show "Using saved token X"
>=20
> I could rebalance suing nodetool and now the nodes are using the correct
> tokens.
>=20
> But the question is, why were the new tokens not read from the
> Cassandra.yaml file? Without using nodetool, how do I make it get the toke=
n
> from the yaml file? Where is it saved?
>=20
> Another question: I could not find the auto_bootstrap in the yaml file as
> per the documentation. Where is this param located?
> Appreciate it.
> Thanks in advance
> Jay
>=20
>=20

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<html><head></head><body bgcolor="#FFFFFF"><div>auto_bootstrap parameter has been removed and always enabled since 1.0.<br><br>maki<br><div><br></div></div><div><br>On 2012/04/12, at 6:10, Paolo Bernardi &lt;<a href="mailto:bernarpa@gmail.com">bernarpa@gmail.com</a>&gt; wrote:<br><br></div><div></div><blockquote type="cite"><div><p>I think that setting auto_bootstrap = true or false into cassandra.yaml is enough (if it isn't there already just add it, for example, after initial_token)</p>
<p>Paolo</p>
<div class="gmail_quote">On Apr 11, 2012 10:34 PM, "Jay Parashar" &lt;<a href="mailto:jparashar@itscape.com">jparashar@itscape.com</a>&gt; wrote:<br type="attribution"><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
Thanks a lot Jeremiah.<br>
Also would you be able to tell me where to &nbsp;configure the auto_bootstrap<br>
parameter in version 1.0.8?<br>
<br>
Thanks<br>
Jay<br>
<br>
-----Original Message-----<br>
From: Jeremiah Jordan [mailto:<a href="mailto:JEREMIAH.JORDAN@morningstar.com">JEREMIAH.JORDAN@morningstar.com</a>]<br>
Sent: Wednesday, April 11, 2012 3:03 PM<br>
To: <a href="mailto:user@cassandra.apache.org">user@cassandra.apache.org</a><br>
Subject: RE: Initial token - newbie question (version 1.0.8)<br>
<br>
You have to use nodetool move to change the token after the node has started<br>
the first time. &nbsp;The value in the config file is only used on first startup.<br>
<br>
Unless you were using RF=3 on your 3 node ring, you can't just start with a<br>
new token without using nodetool. &nbsp;You have to do move so that the data gets<br>
put in the right place.<br>
<br>
How you would do it with out nodetool:<br>
Dangerous, not smart, can easily shoot yourself in the foot and lose your<br>
data way, if you were RF = 3:<br>
If you used RF=3, then all nodes should have all data, and you can stop all<br>
nodes, remove the system keyspace data, and start up the new cluster with<br>
the right stuff in the yaml file (blowing away system means this is like<br>
starting a brand new cluster). &nbsp;Then re-create all of your keyspaces/column<br>
families and they will pick up the already existing data.<br>
<br>
Though, if you are rf=3, nodetool move shouldn't be moving anything anyway,<br>
so you should just do it the right way and use nodetool.<br>
<br>
________________________________________<br>
From: Jay Parashar [<a href="mailto:jparashar@itscape.com">jparashar@itscape.com</a>]<br>
Sent: Wednesday, April 11, 2012 1:44 PM<br>
To: <a href="mailto:user@cassandra.apache.org">user@cassandra.apache.org</a><br>
Subject: Initial token - newbie question (version 1.0.8)<br>
<br>
I created a 3 node ring with the intial_token blank. Of course as expected,<br>
Cassandra generated its own tokens on startup (e.g. tokens X, Y and Z) The<br>
nodes or course were not properly balanced, so I did the following steps<br>
<br>
 &nbsp; &nbsp; &nbsp; &nbsp;1) &nbsp;stopped all the 3 nodes<br>
 &nbsp; &nbsp; &nbsp; &nbsp;2) assigned initial_tokens (A, B, C) respectively<br>
 &nbsp; &nbsp; &nbsp; &nbsp;3) Restarted the nodes<br>
<br>
What I find if that the node were still using the original tokens (X, Y and<br>
Z). Log messages say for node 1 show "Using saved token X"<br>
<br>
I could rebalance suing nodetool and now the nodes are using the correct<br>
tokens.<br>
<br>
But the question is, why were the new tokens not read from the<br>
Cassandra.yaml file? Without using nodetool, how do I make it get the token<br>
from the yaml file? Where is it saved?<br>
<br>
Another question: I could not find the auto_bootstrap in the yaml file as<br>
per the documentation. Where is this param located?<br>
Appreciate it.<br>
Thanks in advance<br>
Jay<br>
<br>
<br>
</blockquote></div>
</div></blockquote></body></html>
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