| copyright |
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|---|---|---|---|
| lastupdated | 2026-06-02 | ||
| subcollection | cloud-databases-gen2 | ||
| keywords | isolated compute, host size, vcpu, ram |
{{site.data.keyword.attribute-definition-list}}
{: #isolated-compute}
[Gen 2]{: tag-purple}
{{site.data.keyword.databases-for}} (on Gen 2 platform) offers an isolated compute hosting model designed for enterprise-grade workloads that demand high performance, security, and dedicated resources. {: shortdesc}
The isolated compute hosting model provisions your database on a single-tenant virtual machine, providing hypervisor-level isolation and dedicated storage bandwidth. This model is ideal for workloads that demand consistent performance, security, and compliance.
All user-data management agents are also isolated, ensuring that your resources are not shared with other tenants.
{: #isolated-compute-resource-mgmt}
In the isolated compute model, CPU and RAM resources are fixed at the time of provisioning. You can manually scale your deployment using the IBM Cloud UI, CLI, API, or Terraform. Disk autoscaling will be supported soon, while CPU and RAM autoscaling are unavailable.
{{site.data.keyword.monitoringfull}} can be integrated to help you track memory, disk space, and disk I/O utilization.
{: #isolated-compute-capacity}
These management containers take up some overhead in your isolated compute instance, consuming a portion of the machine's CPU and RAM, with the remainder available for your database to use. A portion of the database capacity will be allocated to essential operations such as security, ensuring data integrity and protection.
{: #isolated-compute-sizing}
Each machine profile offers size options with defined CPU and RAM. This machine will be exclusively assigned to running your database instance. Storage is configured separately, allowing disk and IOPS customization.
Scale your database and change your machine size using your preferred method: the Cloud Databases CLI plug-in, the Cloud Databases API, or using Terraform.
{: #isolated-compute-sizing-ui} {: ui}
Isolated compute offers two profile types: Fixed profiles with predefined configurations and Flex profiles with customizable resource allocation.
{: #isolated-compute-fixed-ui}
| Host size | vCPU x RAM |
|---|---|
| 4x20 | 4 vCPU x 20 GB RAM |
| 8x40 | 8 vCPU x 40 GB RAM |
| 16x80 | 16 vCPU x 80 GB RAM |
| 32x160 | 32 vCPU x 160 GB RAM |
| 48x240 | 48 vCPU x 240 GB RAM |
| {: caption="Fixed profile UI selections" caption-side="bottom"} |
{: #isolated-compute-flex-ui}
| Host size | vCPU x RAM |
|---|---|
| 4x16 | 4 vCPU x 16 GB RAM |
| 8x32 | 8 vCPU x 32 GB RAM |
| 16x64 | 16 vCPU x 64 GB RAM |
| 32x128 | 32 vCPU x 128 GB RAM |
| 48x192 | 48 vCPU x 192 GB RAM |
| {: caption="Flex profile UI selections" caption-side="bottom"} |
{: #isolated-compute-sizing-cli} {: cli}
Isolated compute offers two profile types: Fixed profiles with predefined configurations and Flex profiles with customizable resource allocation.
The host_flavor parameter defines your Compute sizing. Input the appropriate value for your desired size.
{: #isolated-compute-fixed-cli}
| Host size | vCPU x RAM | host_flavor value |
|---|---|---|
| 4x20 | 4 vCPU x 20 GB RAM | bx3d.4x20.encrypted |
| 8x40 | 8 vCPU x 40 GB RAM | bx3d.8x40.encrypted |
| 8x80 | 8 vCPU x 80 GB RAM | mx3d.8x80.encrypted |
| 32x160 | 32 vCPU x 160 GB RAM | bx3d.32x160.encrypted |
| 48x240 | 48 vCPU x 240 GB RAM | bx3d.48x240.encrypted |
| {: caption="Fixed profile CLI selections" caption-side="bottom"} |
{: #isolated-compute-flex-cli}
| Host size | vCPU x RAM | host_flavor value |
|---|---|---|
| 4x16 | 4 vCPU x 16 GB RAM | b3c.4x16.encrypted |
| 8x32 | 8 vCPU x 32 GB RAM | b3c.8x32.encrypted |
| 16x64 | 16 vCPU x 64 GB RAM | b3c.16x64.encrypted |
| 32x128 | 32 vCPU x 128 GB RAM | b3c.32x128.encrypted |
| 48x192 | 48 vCPU x 192 GB RAM | b3c.48x192.encrypted |
| {: caption="Flex profile CLI selections" caption-side="bottom"} |
{: #isolated-compute-sizing-api} {: api}
Isolated compute offers two profile types: Fixed profiles with predefined configurations and Flex profiles with customizable resource allocation.
The host_flavor parameter defines your Compute sizing. Input the appropriate value for your desired size.
{: #isolated-compute-fixed-api}
| Host size | vCPU x RAM | host_flavor value |
|---|---|---|
| 4x20 | 4 vCPU x 20 GB RAM | bx3d.4x20.encrypted |
| 8x40 | 8 vCPU x 40 GB RAM | bx3d.8x40.encrypted |
| 8x80 | 8 vCPU x 80 GB RAM | mx3d.8x80.encrypted |
| 32x160 | 32 vCPU x 160 GB RAM | bx3d.32x160.encrypted |
| 48x240 | 48 vCPU x 240 GB RAM | bx3d.48x240.encrypted |
| {: caption="Fixed profile API selections" caption-side="bottom"} |
{: #isolated-compute-flex-api}
| Host size | vCPU x RAM | host_flavor value |
|---|---|---|
| 4x16 | 4 vCPU x 16 GB RAM | b3c.4x16.encrypted |
| 8x32 | 8 vCPU x 32 GB RAM | b3c.8x32.encrypted |
| 16x64 | 16 vCPU x 64 GB RAM | b3c.16x64.encrypted |
| 32x128 | 32 vCPU x 128 GB RAM | b3c.32x128.encrypted |
| 48x192 | 48 vCPU x 192 GB RAM | b3c.48x192.encrypted |
| {: caption="Flex profile API selections" caption-side="bottom"} |
{: #isolated-compute-sizing-terraform} {: terraform}
Isolated compute offers two profile types: Fixed profiles with predefined configurations and Flex profiles with customizable resource allocation.
The host_flavor parameter defines your Compute sizing. Input the appropriate value for your desired size.
{: #isolated-compute-fixed-terraform}
| Host size | vCPU x RAM | host_flavor value |
|---|---|---|
| 4x20 | 4 vCPU x 20 GB RAM | bx3d.4x20.encrypted |
| 8x40 | 8 vCPU x 40 GB RAM | bx3d.8x40.encrypted |
| 8x80 | 8 vCPU x 80 GB RAM | mx3d.8x80.encrypted |
| 32x160 | 32 vCPU x 160 GB RAM | bx3d.32x160.encrypted |
| 48x240 | 48 vCPU x 240 GB RAM | bx3d.48x240.encrypted |
| {: caption="Fixed profile Terraform selections" caption-side="bottom"} |
{: #isolated-compute-flex-terraform}
| Host size | vCPU x RAM | host_flavor value |
|---|---|---|
| 4x16 | 4 vCPU x 16 GB RAM | b3c.4x16.encrypted |
| 8x32 | 8 vCPU x 32 GB RAM | b3c.8x32.encrypted |
| 16x64 | 16 vCPU x 64 GB RAM | b3c.16x64.encrypted |
| 32x128 | 32 vCPU x 128 GB RAM | b3c.32x128.encrypted |
| 48x192 | 48 vCPU x 192 GB RAM | b3c.48x192.encrypted |
| {: caption="Flex profile Terraform selections" caption-side="bottom"} |