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.