Oracle Linux Virtualization Manager (OLVM)

Oracle Linux Virtualization Manager (OLVM) is replacing OVM Manager and the hypervisor of choice for Oracle is now Kernel based Virtulization (KVM) instead of XEN.

OLVM is a capable virtualization solution especially for super high capacity servers. For instance the current version supports 12TB of memory which is great capability coparing to maximum of 6TB memory support in latest and the greatest ESXi 7.0 flagship hypervisor. Probably the most common use case for OLV would be Oracle DB systems as it provides amazing performance for that kind of workload.

Here are the key features:

  • High performance and scalability: Low-overhead architecture with the KVM hypervisor provides scalable performance under increasing workloads. Supports servers with up to 2048 logical CPUs and 64 TB of memory to accommodate the most demanding enterprise and cloud applications.
  • Broad guest operating system support: Oracle Linux, Red Hat Enterprise Linux, CentOS, and Microsoft Windows.
  • Modern Linux kernel: Oracle Unbreakable Enterprise Kernel (UEK) Release 5 offers high performance and streamlined partner certifications. Server certification includes support for Oracle Linux and Oracle Linux KVM.

All the key functionalities of OVM are available in OLVM including:

  • Live Migration (host and storage)
  • VM High Availability (HA)
  • Policies (DRS, DPM, Anti-Affinity)
  • Rest API
  • Templates (ovf/ova support)
  • Enterprise Manager Integration

And the below functionalities also been added in 4.2.8 release:

  • VM Snapshots
  • RBAC

Below table is a side by side comparison of key features of OVM vs. OLV (KVM) hypervisors:

If you do have Oracle VM virtualization environment in production you will need to plan for migrating to the new Oracle Linux Virtualization as Oracle has extended support for OVM until March 2021.

If you are running OVM version 3.4 then you can use the semi-automatic migration solution for migrating virtual machines from OVM to OLV that requires OVLM 4.3 or higher at the destination platform.

Oracle Documentation for migrating VMs from OVM to OLV

Oracle Linux Virtualization Requirements:

The Oracle Linux Virtualization Manager (OVLM) and Oracle Linux KVM (Hypervisors) have same software (OS) requirements as the below:

Oracle Linux 7 Update 7

Select Minimal Install as the base environment for the installation.

Unbreakable Enterprise Kernel Release 5 Update 1 or later

The following are the minimum system requirements for Oracle Linux Virtualization Manager hosts:
• 64-bit dual-core CPU – Recommended: 64-bit quad core or greater CPU
• 4 GB RAM – Recommended: 16 GB or greater
• 1 network interface card (NIC) – at least 1 Gbps – Recommended: 2 or more NICs
• 25 GB local writable hard disk – Recommended: 50 GB or greater

The following are the minimum system requirements for Oracle Linux KVM hosts.
• 64-bit dual-core with the Intel VT-x or the AMD AMD-V – Recommended: Multiple CPUs
The CPUs must also support the No eXecute flag (NX)
• 2 GB RAM – Maximum Tested: 12 TB
• 1 network interface card (NIC) – 1Gbps – Recommended: 2 or more NICs
• 60 GB of locally accessibly, writable disk space dedicated to Oracle Linux Virtualization Manager

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