Dedicated Gen 3
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Dedicated Gen 3 runs the same software as on the Grid, but on isolated hosts. Each service is replicated across three hosts in a failover configuration. If a host becomes unavailable, the other two take over so your site remains up.
Dedicated Gen 3 was designed to cater to the needs of organizations that build demanding apps. Compared to the Grid, Dedicated Gen 3 offers increased resources, high availability for all your services and apps, stricter isolation requirements, as well as additional compliance frameworks.
To set up a Dedicated Gen 3 project on any supported cloud provider, contact Platform.sh. Note that existing Grid and Dedicated Gen 2 projects can’t be migrated to Dedicated Gen 3 at this time.
Storage 
Each Dedicated Gen 3 cluster comes with 50GB of storage per environment by default. This storage is intended for your data (databases, search indexes, user uploaded files, etc.) and you can subdivide it as you want.
You can request more storage at any time.
Differences with the Grid
If you upgrade from the Grid to Dedicated Gen 3, there are a few differences you need to be aware of.
Available services
Not every service or version available on the Grid is available on Dedicated Gen 3. The following table shows the currently available services and their versions for Dedicated Gen 3.
| Service | Supported versions |
|---|---|
| Headless Chrome | 95 |
| MariaDB/MySQL | 10.11 Galera, 10.6 Galera, 10.5 Galera, 10.4 Galera, 10.3 Galera |
| Network Storage | 2.0 |
| OpenSearch | 2 |
| PostgreSQL | 16, 15, 14, 13, 12 |
| RabbitMQ | 3.13, 3.12 |
| Redis | 7.2, 7.0, 6.2 |
| Ruby | 3.3, 3.2, 3.1, 3.0 |
| Solr | 9.6, 9.4, 9.2, 9.1, 8.11 |
| Vault KMS | 1.12 |
Your app can connect to each service by referencing the exact same environment variables as for Grid environments. See the services documentation for service-specific details.
Local mounts
Dedicated Gen 3 provides a redundant infrastructure and local mounts aren’t shared between the three hosts.
If you need a folder to be shared between your hosts, set up a network storage mount.
Differences with Dedicated Gen 2
Just like Dedicated Gen 3, Dedicated Gen 2 ensures increased uptime and availability for your apps and services. But as a Dedicated Gen 2 user, you have to go through the Platform.sh Customer Success team to make configuration or application topology changes.
Dedicated Gen 3 gives you both the high availability of Dedicated Gen 2 and the self-service flexibility and features of Grid projects. As a Dedicated Gen 3 user, you can edit your configuration yourself and see those changes reflected in your environments on every push without opening a ticket.