Scylla on RHEL 7

Use these steps to install Scylla using Yum repositories on RHEL

Prerequisites

  • Red Hat Enterprise Linux 7.2 or later, for the 64-bit x86_64 architecture
  • Yum package management application installed
  • ABRT conflict with Scylla coredump configuration. Remove it before installing Scylla: sudo yum remove -y abrt
  • 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

Make sure that all the relevant ports are open.

For server configuration, see documentation on recommendations for high performance

Scylla is supported on Red Hat Enterprise Linux version 7.2 or later. There is no support for RHEL version 6.x and earlier

Procedure

$ sudo yum install wget
$ sudo rpm -i 
http://dl.fedoraproject.org/pub/epel/7/x86_64/e/epel-release-7-9.noarch.rpm

install a repo file: Add the Scylla RPM repo to your system: to a new version

Registration is required.

Configure and run Scylla on CentOS

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_addressIP 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 

Reference

Scylla servers set up using this method have the system configuration covered on System Configuration Guide already applied, by scripts included with the RPM packages. See the guide for a complete reference on settings used: Getting Started