PropertyFileSnitch
Determines the location of nodes by rack and data center.
This snitch determines proximity is determined by rack and data center. It uses a user-defined description of the network details located in the cassandra-topology.properties file. Use this snitch when your node IPs are not uniform or if you have complex replication grouping requirements. When using this snitch, you can define your data center names to be whatever you want. Make sure that the data center names you define correlate to the name of your data centers in your keyspace definition. Every node in the cluster should be described in the cassandra-topology.properties file, and this file should be exactly the same on every node in the cluster.
- Packaged installs: /etc/cassandra/cassandra-topology.properties
- Tarball installs: install_location/conf/cassandra-topology.properties
Procedure
# Data Center One 175.56.12.105 =DC1:RAC1 175.50.13.200 =DC1:RAC1 175.54.35.197 =DC1:RAC1 120.53.24.101 =DC1:RAC2 120.55.16.200 =DC1:RAC2 120.57.102.103 =DC1:RAC2 # Data Center Two 110.56.12.120 =DC2:RAC1 110.50.13.201 =DC2:RAC1 110.54.35.184 =DC2:RAC1 50.33.23.120 =DC2:RAC2 50.45.14.220 =DC2:RAC2 50.17.10.203 =DC2:RAC2 # Analytics Replication Group 172.106.12.120 =DC3:RAC1 172.106.12.121 =DC3:RAC1 172.106.12.122 =DC3:RAC1 # default for unknown nodes default =DC3:RAC1