Methods to provide vm data backup12/5/2023 ![]() Physical device backups require software to be running on the host machine or access to the host’s storage over a network share. If you have multiple machines behind a load balancer, you can take one at a time out of rotation to back things up, but that increases complexity, reduces performance, and risks fault tolerance. And you can’t shut down VMs each night just so you can do backups. That virtual machine is wanting to write multiple changes per second and cannot just stop when it’s running. A file system can be held off from committing a change to disk when a backup application puts a lock on a file to capture it to back up in a second or two, but you cannot do that when you’re trying to back up a virtual disk that may take several minutes to complete. Trying to “grab” an image of a file that is in an almost constant state of change is what makes backing up VMs so different from backing up files. In addition to all the changes going on within the VM’s file systems, which are all reads and writes to that big file, there’s the memory image being written to the swap file of the VM, which is again a bunch of changes being written to that one big file. When a virtual machine is shut down, you can treat that data like a handful of really big files, but who wants to shut down mission-critical servers every night so you can make a backup? Anybody? All of these are likely to be in a constant state of reading and write while the VM is running. More advanced VMs may also include other image files on other storage arrays to handle databases, or log files, or to host the applications that the VM runs. Even a simple VM with a single disk for everything has an image of a system volume, with the full directory structure you’d find on any system, along with supporting files for the image, changes, et al. It’s important to understand that, while a virtual disk is, at least to the host operating system, a single big file, it’s definitely not just a single big file. In this article, we’re going to look at what you want to do to provide a scalable and performant backup solution for your Hyper-V virtual machines running on Microsoft Windows Server 2012, 2012 R2, 2016, and 2019 hosts. They don’t scale, can be confusing to work with, and consume resources much better left for running the production VMs. But as a line of business apps and mission-critical functions are moved from physical hosts to virtual ones, the idea of using “snapshots” to take backups of VMs is simply not enough. All Rights Reserved.Virtualization is becoming ubiquitous today as more and more companies realize the benefits of Hyper-V. ![]() ![]() From the snap copy, you can restore full VMs, restore a disk and attach it to an existing VM, and restore guest files and folders. You can configure a VMware hypervisor to perform IntelliSnap backups. Page and swap files (VMware Tools must be installed on guest VMs) Virtual machines replicated by VMware Site Recovery Manager (SRM)ĭisks using the multi-writer option (install an in-guest agent on the VM to protect data on multi-writer disks) Virtual machines that do not have a disk attached ![]() Virtual machines that are configured with fault tolerance (before ESX 6.x or hardware version 11) Virtual machines that contain SCSI adapters that are configured for bus sharing (physical or virtual) VM hardware version 11 or a more recent version Hosted on ESX 6.x or a more recent version Settings for Distributed Resource Scheduler (DRS)įault-tolerant virtual machines that meet the following requirements:Ĭonfigured as fault tolerant in the vSphere Web client VM templates (using HotAdd, NAS, NBD, or NBDSSL transport modes) Virtual machines (Windows and Linux, powered on or powered off) If backups cannot start immediately, the backup jobs are queued. Manual backups: You can perform on-demand backups for a VM group or for a specific VM. Those backups are performed automatically based on the schedule, without requiring any user action. Scheduled incremental backups: The server backup plan that is assigned to a VM group includes a schedule for ongoing incremental backups. ![]() Initial full backup: When you use Guided setup to set up the Virtualization solution, use the Back up now option to perform a backup for the default VM group. You can recover virtual machine data, even when the most recent backup was incremental.īackups run based on the following options: By default, all subsequent backups are incremental, capturing any changes to VM data since the last backup. The first backup of a VM is always a full backup. You can perform backups automatically based on the configuration for a hypervisor or VM group, or manually for a VM group or a specific VM. Software Upgrades, Updates, and Uninstallation >Ĭommvault for Managed Service Providers (MSPs) > Information for All Virtualized Platforms > ![]()
0 Comments
Leave a Reply.AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |