Shell Aliases¶

After running source env.sh, you get access to several helpful aliases and functions for managing your cluster.

SSH Aliases¶

SSH aliases for all Cassandra nodes are automatically created as c0-cN. The ssh command is not required. For example:

c0 nodetool status

This runs nodetool status on the first Cassandra node.

Cluster Management Functions¶

Command	Description
c-all	Executes a command on every node in the cluster sequentially
c-start	Starts Cassandra on all nodes
c-restart	Restarts Cassandra on all nodes (not a graceful operation)
c-status	Executes nodetool status on db0
c-tpstats	Executes nodetool tpstats on all nodes
c-collect-artifacts	Collects metrics, nodetool output, and system information

Examples¶

Run a command on all nodes¶

c-all "df -h"

Check cluster status¶

c-status

Collect artifacts for performance testing¶

c-collect-artifacts my-test-run

This is useful when doing performance testing to capture the state of the system at a given moment.

Graceful Rolling Restarts¶

For true rolling restarts, we recommend using cstar instead of c-restart.