Apache Cassandra is a NoSQL multi-master database with linear scalability and no single point of failure.
Install the AUR package.
Logging to journald
The package logs to
/var/log/cassandra/system.log by default. To instead log to journald you will need to edit the unit and set the service to run in the foreground by adding
-f to the
ExecStart line, and set Type to
simple as the process will no longer fork.
This can be also done using a systemd drop-in file:
[Service] Type=simple ExecStart= ExecStart=/usr/bin/cassandra -p /run/cassandra/cassandra.pid -f
If Cassandra was running, you will need to drain, and then restart Cassandra.
$ nodetool drain
There is copious amounts of documentation in the default
cassandra.yaml. When installed via the AUR package, it is located in
Basic configuration items to change
Setting the name of the cluster. This needs to be consistent for all nodes that you intend to have in this cluster.
cluster_name: 'Test Cluster'
Set the directory where cassandra will write too, below is the default that will be used if unset. If possible set this to a disk used only for storing cassandra data
data_file_directories: - /var/lib/cassandra/data
For the first node (the seed node) make sure to include its IP address in the seeds, and atleast 1 other node. for all other nodes, try and set a broad range of nodes in the cluster. If a node cannot connect to one of the seeds listed in this configuration at startup - it will fail to start.
seed_provider: - class_name: org.apache.cassandra.locator.SimpleSeedProvider parameters: - seeds: "192.168.1.53, 192.168.1.52"
set this based on what type of disk cassandra is using to store data on
This is the address Cassandra will listen for client connections on
This is the address this node will advertise itself as, ensure both your clients and nodes can reach this node on this address
This is the address used for thrift connections, set to
0.0.0.0 it will listen on all interfaces, which is fine as long as its firewalled for security
If Cassandra fails to run as a service, try running Cassandra
If you receive the following error:
Improperly specified VM option 'ThreadPriorityPolicy=42' Error: Could not create the Java Virtual Machine. Error: A fatal exception has occurred. Program will exit.
If this file already exists, simply add the Environment line into the [Service] block.