About dedicated virtual servers for Classic

The IBM Cloud® 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 IBM Cloud data center your virtual servers are placed in and have capacity by allocating your hosts directly to your account.

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.

Table 1: Control features

Dedicated virtual server feature	Dedicated hosts instances	Dedicated instances
Single-tenant isolation
Virtual server placement control
Resource visibility
Instance billing
Host billing
Post-deployment control
Capacity reservations

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

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.