0 is a perfectly valid id.<br /><br />node - 1 is modulo the maximum token value. that token range is 0 &nbsp;- &nbsp;2**127<br /><br />so node - 1 in this case is 2**127<br /> <br /> <br /> <!--replyfwdwrap--><div style="background-image: url(http://webmail.mailanyone.net/de/r_bg_img.gif);background-position:top;background-repeat:repeat-x;"><strong>----- Original Message -----</strong><br /><strong>From:</strong> &quot;Deno Vichas&quot; &lt;deno@syncopated.net&gt; <br /><strong>Sent:</strong> Wed, April 25, 2012 18:11<br /><strong>Subject:</strong> Re: EC2 Best Practices<br /><br /><table width="100%" cellspacing="5"><tbody><tr><td><div class="PrivateMsgDiv"><!-- begin sanitized html --><br />&nbsp;<br />             <div class="bodyclass" style="color: #000000; ">has anybody written up anything related to recovery for fails in     EC2?<br />     <br />     this morning i woke up to find 1 (of 4) nodes marked as     unreachable.&nbsp; i used the datastax (1.0.7) ami to set up my clu
 ster     and the node that fail had the token id of 0 (this is the seed node     - right?).&nbsp; the docs says to replace a failed node to set the token     to failed node - 1, which i don't think would work.&nbsp; luckily     rebooting the machine&nbsp; <br />     <br />     but i'm left with the question of what should i do if node with the     token ID of 0 fails and should i even have a node with that ID.<br />     <br />     <br />     thanks,<br />     deno<br />     <br />     <br />     <br />     On 2/23/2012 11:21 AM, aaron morton wrote:     <blockquote cite="mid:4E1EA2E7-2153-4619-906D-0B5D049D908F@thelastpickle.com" type="cite">General EC2 setup.       <div>&nbsp;</div>       <div><a moz-do-not-send="true" href="http://www.datastax.com/docs/1.0/install/install_ami" target="_new">http://www.datastax.com/docs/1.0/install/install_ami</a></div>       <div><a moz-do-not-send="true" href="http://wiki.apache.org/cassandra/CloudConfig" target="_new">http://wiki.apache.org/cassa
 ndra/CloudConfig</a></div>       <div>&nbsp;</div>       <div>Cassandra with a VPN on EC2. From memory it talks about using         the VPN within EC2.&nbsp;</div>       <div><a moz-do-not-send="true" href="http://blog.vcider.com/2011/09/running-cassandra-on-a-virtual-network-in-ec2/" target="_new">http://blog.vcider.com/2011/09/running-cassandra-on-a-virtual-network-in-ec2/</a></div>       <div>&nbsp;</div>       <div>Clients need a single port (9160) to talk to the cluster.</div>       <div>&nbsp;</div>       <div>Hope that helps.&nbsp;</div>       <div><br />         <div apple-content-edited="true">&nbsp;</div>         <br />         <div apple-content-edited="true"><span class="Apple-style-span" style="border-collapse: separate; font-family: Helvetica; -webkit-border-horizontal-spacing: 0px; -webkit-border-vertical-spacing: 0px; "><span class="Apple-style-span" style="border-collapse: separate; color: rgb(0, 0, 0);
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                space; -webkit-line-break: after-white-space; "><span class="Apple-style-span" style="border-collapse:
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                    space; -webkit-line-break: after-white-space; "><span class="Apple-style-span" style="border-collapse:
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                        -webkit-nbsp-mode: space; -webkit-line-break:
                        after-white-space; "><div><div>-----------------</div>                           <div>Aaron Morton</div>                           <div>Freelance Developer</div>                           <div>@aaronmorton</div>                           <div><a moz-do-not-send="true" href="http://www.thelastpickle.com" target="_new">http://www.thelastpickle.com</a></div></div></div>                     </span></div>                 </span></div>             </span></span></div>         <br />         <div><div>On 24/02/2012, at 3:46 AM, Philip Shon wrote:</div>           <br class="Apple-interchange-newline" />           <blockquote type="cite">Are there any good resources for best             practices when running Cassandra within EC2? I'm             particularly interested in the security issues, when the             servers communicating w/ Cassandra are outside of EC2.             <div>&nbsp;</div>             <div>Thanks,</div>             <div>&nbsp;</div>            
  <div>-Phil</div>           </blockquote></div>         </div>     </blockquote>     </div><br />&nbsp;<br /><!-- end sanitized html --></div></td></tr> </tbody></table></div>