Set up multi-node on self-hosted TimescaleDB
To set up multi-node on a self-hosted TimescaleDB instance, you need:
- A PostgreSQL instance to act as an access node (AN)
- One or more PostgreSQL instances to act as data nodes (DN)
- TimescaleDB installed and set up on all nodes
- Access to a superuser role, such as
postgres, on all nodes
The access and data nodes must begin as individual TimescaleDB instances. They should be hosts with a running PostgreSQL server and a loaded TimescaleDB extension. For more information about installing self-hosted TimescaleDB instances, see the installation instructions.
The multi-node TimescaleDB architecture consists of an access node (AN) which stores metadata for the distributed hypertable and performs query planning across the cluster, and a set of data nodes (DNs) which store subsets of the distributed hypertable dataset and execute queries locally. For more information about the multi-node architecture, see about multi-node.
If you intend to use continuous aggregates in your multi-node environment, check the additional considerations in the continuous aggregates section.
Set up multi-node on self-hosted TimescaleDB
When you have installed TimescaleDB on the access node and as many data nodes as you require, you can set up multi-node and create a distributed hypertable.
note
Setting up multi-node on self-hosted TimescaleDB
- On the access node (AN), run this command and provide the hostname of the
first data node (DN1) you want to add:
SELECT add_data_node('dn1', 'dn1.example.com') - Repeat for all other data nodes:
SELECT add_data_node('dn2', 'dn2.example.com') SELECT add_data_node('dn3', 'dn3.example.com') - On the access node, create the distributed hypertable with your chosen
partitioning. In this example, the distributed hypertable is called
example, and it is partitioned ontimeandlocation:SELECT create_distributed_hypertable('example', 'time', 'location'); - Insert some data into the hypertable. For example:
INSERT INTO example VALUES ('2020-12-14 13:45', 1, '1.2.3.4');
When you have set up your multi-node installation, you can configure your cluster. For more information, see the configuration section.
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