A.9. Continuent Tungsten 4.0.0 GA (17 Apr 2015)
Continuent Tungsten 4.0 is a major release which is
designed to provide integration between
Continuent Tungsten 4.0 and Tungsten Replicator
4.0. Providing MySQL clustering support, while providing
replication for MySQL, Oracle, and out to datawarehouses such as
HP Vertica, Amazon Redshift and Hadoop.
For more information on replicating data out of a cluster, see
Section 3.4, “Replicating Data Out of an Existing Cluster”.
The following issues may affect the operation of Continuent Tungsten
and should be taken into account when deploying or updating to
When using read-only connectors, and making use of explicit
transactions (i.e. with autocommit disabled), queries may be
routed to the master, rather than a slave.
For security purposes you should ensure that you secure the
following areas of your deployment:
Ensure that you create a unique installation and deployment
user, such as tungsten, and set the correct file permissions
on installed directories. See
Section B.2.3, “Directory Locations and Configuration”.
When using ssh and/or SSL, ensure that the ssh key or
certificates are suitably protected. See
Section B.2.2.2, “SSH Configuration”.
Use a firewall, such as iptables to
protect the network ports that you need to use. The best
solution is to ensure that only known hosts can connect to
the required ports for Continuent Tungsten. For more information
on the network ports required for Continuent Tungsten operation,
see Section B.2.2.1, “Network Ports”.
If possible, use authentication and SSL connectivity between
hosts to protext your data and authorisation for the tools
used in your deployment. See
Section 2.7, “Deploying SSL Secured Replication and Administration” for more information.
Under certain circumstances, the
rsync process can
randomly fail during the installation/ deployment process when
using the staging method of deployment. The error code returned
by rsync may be
The error is transient and non-specific and deployment should be
Improvements, new features and functionality