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copyright
years
2017, 2025
lastupdated 2025-04-09
subcollection virtual-servers

{{site.data.keyword.attribute-definition-list}}

About dedicated virtual servers for Classic

{: #dedicated-virtual-servers}

The {{site.data.keyword.Bluemix}} Classic infrastructure dedicated host is a virtualized, single-tenant, dedicated server. It provides you with maximum control over your Classic workload placement and flexible post-provisioning options. You can decide which pre-determined {{site.data.keyword.cloud_notm}} data center your virtual servers are placed in and have capacity by allocating your hosts directly to your account. {: shortdesc}

The offering includes the following features:

  • Affinity and anti-affinity. You can specify host-to-virtual server and virtual server-to-virtual server relationships that need to remain, which are known as affinity and anti-affinity rules. These rules help you make sure that your workloads are placed based on your workload requirements.
  • Post-deployment management. You can migrate virtual servers between dedicated hosts based on your workload requirements.
  • Workload visibility. You can view resource consumption—core, RAM, and local storage—for each host, giving you maximum control over your workload management.

You have the choice of two deployment models: dedicated hosts and dedicated instances. Classic dedicated hosts help with control over workload placement and dedicated instances offer single-tenant isolation. See the following table to compare dedicated host and instance features.

Dedicated virtual server feature Dedicated hosts instances Dedicated instances
Single-tenant isolation Checkmark icon Checkmark icon
Virtual server placement control Checkmark icon
Resource visibility Checkmark icon
Instance billing Checkmark icon
Host billing Checkmark icon
Post-deployment control Checkmark icon
Capacity reservations Checkmark icon
{: caption="Table 1: Control features" caption-side="top"}

Classic dedicated instances do not provide some of the control features offered by dedicated hosts. See the following table for more details. {: note}

Pricing of the host is inclusive of core, RAM, Local SSD, and network speeds. Premium operating system (OS), storage area network (SAN) storage, and software add-ons are priced per instance with existing pricing and licensing in an hourly or monthly model.

Keep the following list in mind when you order a dedicated host and dedicated host instance for Classic:

  • The size of your host is determined by your workloads. The default is 56 Cores X 242 GB RAM X 1.2 TB, but you can choose from more configurations.
  • You can order only two hosts at a time. For example, if you need six hosts, then you need to place three separate orders.
  • Each host needs its own unique name and you can automatically assign your POD.
  • Network speeds up to 20 Gbps are achievable through extra configuration. For more information about network performance, see Configuring virtual server settings to improve network performance.

Next steps

{: #next-steps-dedicated-virtual-servers}

After you reviewed and decided upon your deployment options, it is time to provision your virtual server. To get started, see Provisioning dedicated hosts and instances.