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Scylla on Ubuntu 16.04

Prerequisites

  • Root or sudo access 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.

Procedure

install a repo file. Add the Scylla APT repository to your system.

Registration is required.

Configure and run Scylla on Ubuntu 16.04

Configure Scylla

Configure the /etc/scylla/scylla.yaml file with the following parameters:

ItemContent
cluster_nameName of the cluster, all the nodes in the cluster must have the same name
seedsSeed 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_addressIP address of interface for client connections (Thrift, CQL)

More information regarding the scylla.yaml file.

Scylla setup

Run the scylla_setup script to tune the system settings

sudo scylla_setup

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

Run Scylla as a service (if not already running)

sudo systemctl start scylla-server

run nodetool

nodetool status

run cqlsh

cqlsh

Run cassandra-stress

cassandra-stress write -mode cql3 native 

Monitoring

It is highly recommended to have a Scylla monitoring stack in place. For more on how to setup Scylla monitoring with Grafana here

Reference

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.

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