Configuration

Common Errors

配置项前一定不要有空格

Configuring file

conf/cassandra.yaml

Main configring file

  • cluster_name: node in the same cluster should have the same name
  • num_tokens: for virtual nodes
  • partitioner: line 91, indicates the partitioner used in the Cassandra
  • data_file_directories: the place database store the file
  • endpoint_snitch: indicates the snitch policy

Providing Cassandra with Permission to Directories

After set the cassandra.yaml, make directories, /var/lib/cassandra and /var/log/cassandra.
Change the owner of folder

sudo chown -R $USER:$GROUP /var/lib/cassandra
sudo chown -R $USER:$GROUP /var/log/cassandra

Basic Cassandra Operation

bin/cassandra: run cassandra in the background
with -f run cassandra in front

ps aux | grep cass : find the process id of cassandra, then use kill command to stop cassandra

nodetool status: check the status of cassandra cluster nodetool info -h 127.0.0.1 nodetool ring: print token ring

System log file

previous set in /var/log/cassandra
system.log: show the system logs

in conf/
log4j.server.properties

  • log4j.appender.R.File: indicates where the file written system log