Advanced backup options for hyper-v 2012 r2 on veeam _ marius sandbu – it blog

in a simple day to day virtual machine life, the read & writes consist of I/O traffic from a virtual machines to a VHD/VHDX. Best backup software windows 7 Residing on a network share. File backup software reviews SAN/SMB and such.


When we setup Veeam to take backup of a virtual machine, what will happen is the following. Phone backup software First thing is that Veeam will trigger a snapshot using the Hyper-V Integration Services Shadow Copy Provider on that particular Hyper-V host that the virtual machine resides on. Mobile data backup software free download What will happen is that a AVHDX. Best free file backup software This can either be done using an hardware VSS provier or software VSS provider.

A hardware provider manages shadow copies at the hardware level by working in conjunction with a hardware storage adapter or controller. Data backup and recovery software free download full version A software provider manages shadow copies by intercepting I/O requests at the software level between the file system and the volume manager. Best free pc backup software The number of VMs in a group is limite depending on VSS provider. Best image backup software For a software VSS provider — 4 VMs, for a hardware VSS provider — 8 VMs.

NOTE: Using Offhost-proxy, requires an storage solution which supports an hardware transferrable shadow copies against a SAN. One touch backup software If we for instance use SMB based storage for Hyper-V we do not require this –> http://helpcenter.veeam.com/backup/hyperv/smb_off-host_backup.html

Make sure that the integration services and running and up to date before doing online backup, you can check this from Hyper-V PowerShell –> Get-VM | FT Name, IntegrationServicesVersion

6: The integration service component notifices the Hypervisor that the VM is ready for backup, and Hyper-V will then take a snapshot of the volume which the Virtual machine is located on. Free backup software windows 10 Then a AVHDX file will be generated, all WRITES will be redirected there.

7: The volume snapshot is presented to Veeam either using Off-host or on-host backup. Best driver backup software 2015 (If the Off-host proxy is not available it will fallback to on-host proxy on a designeted host)

NOTE: Off-host setup requires an dedicated Hyper-V host (It requires Hyper-V to have access to the VSS providers) and in case of using Off-host it cannot be part of the Hyper-V cluster, and make sure it has READ only access to the LUN and that your storage vendors supports readable shadow volume copies.

On-host backup will use the Veeam transport service on the Hyper-V machine. Backup utility software If the volume is placed on a CSV volume, the CSV Software Shadow Copy Provider will be used for the snapshot creation process.

NOTE: During the backup process, Veeam will try to use its own CBT driver on Hyper-V host to make sure that it only takes backup of only the changed blocks. Top rated backup software (Since Hyper-V does not natively provide CBT, this will change in Windows Server 2016)

NOTE: If CBT is not working on Veeam run the command Reset-HvVmChangeTracking PowerShell cmdlet http://helpcenter.veeam.com/backup/80/powershell/reset-hvvmchangetracking.html, or if the virtual machines are being shut down during backup process, try to disable ODX)

If Change block tracking is not enabled or not working as it should, the backup proxy will copy the virtual machine and use Veeam’s proprietary filtering mechanism. Backup software download so Instead of tracking changed blocks of data, Veeam Backup & Replication filters out unchanged data blocks. Retrospect backup software During backup, Veeam Backup & Replication consolidates virtual disk content, scans through the VM image and calculates a checksum for every data block. Best backup software android Checksums are stored as metadata to backup files next to VM data.

In case of application aware, The VM OS is suspsended and the content of the system memory and CPU is written to a dump file, in order to be able to perserve the data integrity of files with for instance transactional applications (This is known as offline backup)

If you do not want to suspend the virtual machine during backup, you can use crach consistent backup instead of suspending the virtual machine. Best free automatic backup software This is equal to a hard reset of a virtual machine, this does not involve any downtime to a virtual machine but it does not preserve the data integrity of open files and may result in data loss.

If you have multiple virtual machines within the same job, this feature will help reduce the load on the Hyper-V hosts.As this will trigger a volume snapshot for mulitple machines instead of a single virtual machine.

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