Replication into Redshift requires two separate replicator installations, one that extracts information from the source database, and a second that generates the CSV files, loads those files into S3 and then executes the statements on the Redshift database to import the CSV data and apply the transformations to build the final tables.
The two replication services can operate on the same machine, (See Section 5.3, “Deploying Multiple Replicators on a Single Host”) or they can be installed on two different machines.
Once you have completed the configuration of the Amazon Redshift database, you can configure and install the applier as described using the steps below.
Before installing the applier, the following additions need adding to the extractor configuration. Apply the following parameter to the extractor configuration before installing the applier
Add the following the /etc/tungsten/tungsten.ini
[alpha] ...Existing Replicator Config... enable-heterogeneous-service=trueshell>tpm update
The above step is only applicable for standalone extractors. If you are configuring replications from an existing Tungsten Cluster (Cluster-Extractor), follow the steps outlined here to ensure the cluster is configured correctly: Section 3.4.1, “Prepare: Replicating Data Out of a Cluster”
The applier can now be configured. Unpack the Tungsten Replicator distribution in staging directory:
shell> tar zxf tungsten-replicator-6.0.5-40.tar.gzChange into the staging directory:
shell> cd tungsten-replicator-6.0.5-40Configure the installation using tpm:
shell>./tools/tpm configure defaults \ --reset \ --user=tungsten \ --install-directory=/opt/continuent \ --profile-script=~/.bash_profileshell>./tools/tpm configure alpha \ --topology=master-slave \ --master=sourcehost \ --members=localhost \ --datasource-type=redshift \ --replication-host=redshift.us-east-1.redshift.amazonaws.com \ --replication-user=awsRedshiftUser \ --replication-password=awsRedshiftPass \ --redshift-dbname=dev \ --batch-enabled=true \ --batch-load-template=redshift \ --svc-applier-filters=dropstatementdata \ --svc-applier-block-commit-interval=30s \ --svc-applier-block-commit-size=250000
shell> vi /etc/tungsten/tungsten.ini[defaults] user=tungsten install-directory=/opt/continuent profile-script=~/.bash_profile[alpha] topology=master-slave master=sourcehost members=localhost datasource-type=redshift replication-host=redshift.us-east-1.redshift.amazonaws.com replication-user=awsRedshiftUser replication-password=awsRedshiftPass redshift-dbname=dev batch-enabled=true batch-load-template=redshift svc-applier-filters=dropstatementdata svc-applier-block-commit-interval=30s svc-applier-block-commit-size=250000
Configuration group defaults
The description of each of the options is shown below; click the icon to hide this detail:
For staging configurations, deletes all pre-existing configuration information between updating with the new configuration values.
System User
--install-directory=/opt/continuent
install-directory=/opt/continuent
Path to the directory where the active deployment will be installed. The configured directory will contain the software, THL and relay log information unless configured otherwise.
--profile-script=~/.bash_profile
profile-script=~/.bash_profile
Append commands to include env.sh in this profile script
Configuration group alpha
The description of each of the options is shown below; click the icon to hide this detail:
Replication topology for the dataservice. Valid values are star,cluster-slave,master-slave,fan-in,clustered,cluster-alias,all-masters,direct
The hostname of the Primary (extractor) within the current service. If the current host does not match this specification, then the deployment willby default be configured as a Primary/extractor.
Hostnames for the dataservice members
Database type
--replication-host=redshift.us-east-1.redshift.amazonaws.com
replication-host=redshift.us-east-1.redshift.amazonaws.com
Hostname of the datasource where the database is located. If the specified hostname matches the current host or member name, the database is assumed to be local. If the hostnames do not match, extraction is assumed to be via remote access. For MySQL hosts, this configures a remote replication Replica (relay) connection.
--replication-user=awsRedshiftUser
replication-user=awsRedshiftUser
For databases that required authentication, the username to use when connecting to the database using the corresponding connection method (native, JDBC, etc.).
--replication-password=awsRedshiftPass
replication-password=awsRedshiftPass
The password to be used when connecting to the database using
the corresponding
--replication-user.
Name of the Redshift database to replicate into
Should the replicator service use a batch applier
--batch-load-template=redshift
Value for the loadBatchTemplate property
--svc-applier-filters=dropstatementdata
svc-applier-filters=dropstatementdata
Replication service applier filters
--svc-applier-block-commit-interval=30s
svc-applier-block-commit-interval=30s
Minimum interval between commits
--svc-applier-block-commit-size=250000
svc-applier-block-commit-size=250000
Applier block commit size (min 1)
If your MySQL source is a Tungsten Cluster, ensure the additional steps below are also included in your applier configuration
First, prepare the required filter configuration file as follows on the Redshift applier host(s) only:
shell>mkdir -p /opt/continuent/share/shell>cp tungsten-replicator/support/filters-config/convertstringfrommysql.json /opt/continuent/share/
Then, include the following parameters in the configuration
property=replicator.stage.remote-to-thl.filters=convertstringfrommysql
property=replicator.filter.convertstringfrommysql.definitionsFile=/opt/continuent/share/convertstringfrommysql.json
Once the prerequisites and configuring of the installation has been completed, the software can be installed:
shell> ./tools/tpm install
If the installation process fails, check the output of the
/tmp/tungsten-configure.log file for
more information about the root cause.
On the host that is loading data into Redshift, create the
s3-config-
file and then copy that file into the servicename.jsonshare directory
within the installed directory on that host. For example:
shell> cp s3-config-servicename.json /opt/continuent/share/Now the services can be started:
shell> replicator startOnce the service is configured and running, the service can be monitored as normal using the trepctl command. See Section 4.2.6, “Management and Monitoring of Amazon Redshift Deployments” for more information.