At the storage level, the granularity of array operations like snapshots and replication is at a volume level (i.e. This gives us a lot of flexibility, but at the same time, the increased abstraction leads to loss of control as well as monitoring capabilities. A VMFS datastore typically consists of a single storage volume, but it contains virtual disks from multiple virtual machines. VMFS datastore supports VMware distributed infrastructure services such as vSphere vMotion, DRS, and vSphere HA to operate across a cluster of ESXi hosts. Each virtual machine consists of a set of files (vmdks) and VMFS is the default storage system for these files on physical SCSI disks and partitions. VMFS is a cluster file system that provides storage virtualization optimized for virtual machines. This process can also be used to provision and refresh clones of a production Oracle database running on physical servers.īefore we dive deep into vVols, let's first take a quick look at VFMS and RDM, and how vVols address their shortcomings. Many organizations run their production workloads on physical servers and their tier-two environments on virtual.
The instructions provided here can also be used to move a virtualized Oracle database on VMware RDMs to VMware Virtual Volumes. We'll see how simple it is to migrate from physical to virtual and visa versa using the vVol technology. In this article, we'll go through the use case of migrating an Oracle database running on physical hardware to a VMware virtual machine using vVols. vVol datastores address the challenges of over-abstraction of virtual disks in VMFS datastores on one end, and rigidity of RDM (Raw Device Mapping) datastores on the other. VMware Virtual Volumes (vVol) is a new technology introduced in vSphere 6.0 to radically simplify storage management for vSphere admins as well as storage admins. In the past, database storage options available to Oracle DBAs for creating virtual disks were limited to either a VMFS (Virtual Machine File System) datastore, or a RDM (Raw Device Mapping) disk. VMware is a widely used virtualization platform for running Oracle databases.
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