Enable tiered storage in Aiven for ClickHouse®

Enable the tiered storage feature on a table in your Aiven for ClickHouse® service.

Before you enable tiered storage, review the limitations.

Prerequisites

• You have at least one Aiven for ClickHouse service.
• Depending on how to activate tiered storage, you need:
  • Aiven Console or
  • SQL and an SQL client (for example, the ClickHouse client).
• All maintenance updates are applied on your service (check in the Aiven Console: your service's Service settings > Service management > Maintenance updates).

Activate tiered storage on a table

You can enable tiered storage both on new tables and on existing ones. For that purpose, you can use either CLI or the Aiven Console.

Console

1. Log in to the Aiven Console and choose your Aiven for ClickHouse service.
2. In the service sidebar, click Data > Databases and tables.
3. In the Databases and tables view, find a table on which to activate tiered storage, and click Actions > Activate tiered storage > Activate.

CLI

1. Connect to your Aiven for ClickHouse service using, for example, the ClickHouse client.

2. To activate the tiered storage feature on a specific table, set storage_policy to tiered on this table by executing the following SQL statement:

   ALTER TABLE database-name.table-name MODIFY SETTING storage_policy = 'tiered'

Tiered storage is activated on your table and data in this table is now distributed between two tiers: Network-attached block storage and object storage.

What's next

• Configure data retention thresholds for tiered storage
• Check data volume distribution between different disks

Related pages

• About tiered storage in Aiven for ClickHouse
• Transfer data between network-attached block storage and object storage