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Replicate Multiple Cloudant Accounts


Replicate multiple Cloudant accounts to one or many databases.

CData Sync for Cloudant is a stand-alone application that provides solutions for a variety of replication scenarios such as replicating sandbox and production instances into your database. Both Sync for Windows and Sync for Java include a command-line interface (CLI) that makes it easy to manage multiple Cloudant connections. In this article we show how to use the CLI to replicate multiple Cloudant accounts.

Configure Cloudant Connections

You can save connection and email notification settings in an XML configuration file. To replicate multiple Cloudant accounts, use multiple configuration files. Below is an example configuration to replicate Cloudant to SQLite:

Windows

<?xml version="1.0" encoding="UTF-8" ?> <CDataSync> <DatabaseType>SQLite</DatabaseType> <DatabaseProvider>System.Data.SQLite</DatabaseProvider> <ConnectionString>User=abc123; Password=abcdef;</ConnectionString> <ReplicateAll>False</ReplicateAll> <NotificationUserName></NotificationUserName> <DatabaseConnectionString>Data Source=C:\my.db</DatabaseConnectionString> <TaskSchedulerStartTime>09:51</TaskSchedulerStartTime> <TaskSchedulerInterval>Never</TaskSchedulerInterval> </CDataSync>

Java

<?xml version="1.0" encoding="UTF-8" ?> <CDataSync> <DatabaseType>SQLite</DatabaseType> <DatabaseProvider>org.sqlite.JDBC</DatabaseProvider> <ConnectionString>User=abc123; Password=abcdef;</ConnectionString> <ReplicateAll>False</ReplicateAll> <NotificationUserName></NotificationUserName> <DatabaseConnectionString>Data Source=C:\my.db</DatabaseConnectionString> </CDataSync>

Set the following connection properties to connect to Cloudant:

  • User: Set this to your username.
  • Password: Set this to your password.

Configure Queries for Each Cloudant Instance

Sync enables you to control replication with standard SQL. The REPLICATE statement is a high-level command that caches and maintains a table in your database. You can define any SELECT query supported by the Cloudant API. The statement below caches and incrementally updates a table of Cloudant data:

REPLICATE Movies;

You can specify a file containing the replication queries you want to use to update a particular database. Separate replication statements with semicolons. The following options are useful if you are replicating multiple Cloudant accounts into the same database:

You can use a different table prefix in the REPLICATE SELECT statement:

REPLICATE PROD_Movies SELECT * FROM Movies

Alternatively, you can use a different schema:

REPLICATE PROD.Movies SELECT * FROM Movies

Run Sync

After you have configured the connection strings and replication queries, you can run Sync with the following command-line options:

Windows

CloudantSync.exe -g MyProductionCloudantConfig.xml -f MyProductionCloudantSync.sql

Java

java -Xbootclasspath/p:c:\sqlitejdbc.jar -jar CloudantSync.jar -g MyProductionCloudantConfig.xml -f MyProductionCloudantSync.sql

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