sudoaccess to the system. The Scylla packages create a scylla user. When starting Scylla as a service, the service runs as this user.
For server configuration, see documentation on recommendations for high performance.
Configure the /etc/scylla/scylla.yaml file with the following parameters:
|cluster_name||Name of the cluster, all the nodes in the cluster must have the same name|
|seeds||Seed nodes are used during startup to bootstrap the gossip process and join the cluster|
|listen_address||IP address that the Scylla use to connect to other Scylla nodes in the cluster|
|rpc_address||IP address of interface for client connections (Thrift, CQL)|
More information regarding the scylla.yaml file.
Run the scylla_setup script to tune the system settings
This script invokes a set of scripts to configure several operating system settings, like setting RAID0 and XFS filesystem. It also runs a short (up to a few minutes) benchmark on your storage and generates the
/etc/scylla.d/io.conf configuration file. When the file is ready, you can start Scylla (see below). Scylla will not run without XFS or
io.conf file. To bypass this check, set Scylla to developer mode
sudo service scylla-server start
If Scylla starts successfully, you will see:
$ sudo service scylla-server start scylla-server start/running, process 9367
and you are able to access the node with
$ cqlsh Connected to Test Cluster at 127.0.0.1:9042. [cqlsh 5.0.1 | Cassandra 2.1.8 | CQL spec 3.2.0 | Native protocol v3] Use HELP for help.
If Scylla does not start up successfully and you see:
$ sudo service scylla-server start scylla-server stop/waiting
You should check Scylla logs in
/var/log/syslog and follow its instructions (or report a bug).
sudo service scylla-jmx start
After the JMX proxy is started, you can access the Scylla server using
$ nodetool status Datacenter: datacenter1 ======================= Status=Up/Down |/ State=Normal/Leaving/Joining/Moving -- Address Load Tokens Owns Host ID Rack UN 127.0.0.1 16.83 KB 256 ? ec2c7a8b-182a-408f-aad8-052247f7e677 rack1
Note: Non-system keyspaces don't have the same replication settings, effective ownership information is meaningless
Finally, to test the Scylla node, run
cassandra-stress write -mode cql3 native
It is highly recommended to have a Scylla monitoring stack in place. For more on how to setup Scylla monitoring with Grafana here
Scylla servers set up using this method have the system configuration covered on System Configuration Guide already applied, by the deb package install scripts. See the guide for a complete reference on settings used: Getting Started
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