Re: How to prevent the removed DC comes back automactically?
How can we prevent a disconnected DC from coming back automatically? You could use firewall rules to prevent the disconnected DC from contacting your live DCs when it becomes live again Mark On Thu, Aug 14, 2014 at 6:48 AM, Lu, Boying boying...@emc.com wrote: Hi, All, We are using Cassandra 2.0.7 in a multi DCs environments. If a connected DC is powered off, we use the ‘nodetool removenode’ command to remove it from the connected DCs. But we found that once the disconnected DC is powered on, it will connect to other DCs automatically. How can we prevent a disconnected DC from coming back automatically? Thanks a lot Boying
Re: How to prevent the removed DC comes back automactically?
Hey, not sure if that's what you're looking for but you can use auto_bootstrap=false in your yaml file to prevent nodes from bootstrapping themselves on startup. This option has been removed and the default is true. You can add it to your configuration though. There's a bit of documentation here: http://www.datastax.com/documentation/cassandra/1.2/cassandra/configuration/configCassandra_yaml_r.html -- artur On 14/08/14 06:48, Lu, Boying wrote: Hi, All, We are using Cassandra 2.0.7 in a multi DCs environments. If a connected DC is powered off, we use the ‘nodetool removenode’ command to remove it from the connected DCs. But we found that once the disconnected DC is powered on, it will connect to other DCs automatically. How can we prevent a disconnected DC from coming back automatically? Thanks a lot Boying
RE: How to prevent the removed DC comes back automactically?
Thanks a lot. But we want to block all the communications to/from the disconnected VDC without reboot it. From: Artur Kronenberg [mailto:artur.kronenb...@openmarket.com] Sent: 2014年8月14日 17:00 To: user@cassandra.apache.org Subject: Re: How to prevent the removed DC comes back automactically? Hey, not sure if that's what you're looking for but you can use auto_bootstrap=false in your yaml file to prevent nodes from bootstrapping themselves on startup. This option has been removed and the default is true. You can add it to your configuration though. There's a bit of documentation here: http://www.datastax.com/documentation/cassandra/1.2/cassandra/configuration/configCassandra_yaml_r.html -- artur On 14/08/14 06:48, Lu, Boying wrote: Hi, All, We are using Cassandra 2.0.7 in a multi DCs environments. If a connected DC is powered off, we use the ‘nodetool removenode’ command to remove it from the connected DCs. But we found that once the disconnected DC is powered on, it will connect to other DCs automatically. How can we prevent a disconnected DC from coming back automatically? Thanks a lot Boying
Re: How to prevent the removed DC comes back automactically?
On Thu, Aug 14, 2014 at 1:59 AM, Artur Kronenberg artur.kronenb...@openmarket.com wrote: not sure if that's what you're looking for but you can use auto_bootstrap=false in your yaml file to prevent nodes from bootstrapping themselves on startup. This option has been removed and the default is true. You can add it to your configuration though. There's a bit of documentation here: http://www.datastax.com/documentation/cassandra/1.2/cassandra/configuration/configCassandra_yaml_r.html That's not what auto_bootstrap:false is for, the formerly-dead nodes will contact the currently-live nodes, which is what OP does not want. Also if those nodes had been removed, they would take over ranges that OP does not want them to. OP should definitely not use auto_bootstrap:false here. https://engineering.eventbrite.com/changing-the-ip-address-of-a-cassandra-node-with-auto_bootstrapfalse/ =Rob
