Deduplication of backup storage is especially important in the case of virtual machine backups. Whether you're using Hyper-V Server VMs or VMware, optimized storage usage is of paramount importance, since VHD and VMDK files tend to be huge. It's therefore ineffective to store them in full after each backup.
Using BackupChain (see screenshot below) you can specify incremental and differential deduplication for your Hyper-V and VMware backups. Those so-called in-file delta compressed backups are created automatically and each backup cycle refers to the previous one. The storage savings are substantial: after the full backup, each daily backup is reduced to around 5%.
Example: Say you have a 100GB virtual machine. The first backup will be a compressed full backup at perhaps around 40GB. The next daily increments, using deduplication, are typically compressed down to 2-5 GB per day.
The setup is simple, in the Deduplication tab choose either 'incremental' or 'differential' deduplication:
However, virtual machine backup deduplication requires a couple more tweaks for optimal performance. For example, if backups are taken at night and the VMs aren't being used much, you could increase the number of CPU cores used for backups and have the backup task finish faster.
Alternatively, if backups are taken during the day, the deduplication task may be configured to use just one or two CPU cores so it leaves enough resources left over for VM processes.
Another common variable that advanced users may want to change is the block size. Since deduplication works on blocks, the block size has a direct effect on performance and storage usage. Larger blocks reduce overhead and increase speed; however, they are inefficient with space usage. Smaller blocks are more efficient with storage space but require more CPU work.
Backup Software OverviewThe Best Backup Software in 2023 Download BackupChain®
BackupChain is the all-in-one server backup software for:
Disk Image Backup
Drive Cloning and Disk Copy
File Server Backup
Virtual Machine Backup
Server Backup Solution
- Best Practices for Server Backups
- NAS Backup: Buffalo, Drobo, Synology
- How to use BackupChain for Cloud and Remote
- DriveMaker: Map FTP, SFTP, S3 Sites to a Drive Letter (Freeware)
- VM Backup
- V4 Articles
- Knowledge Base
- Archive 2022
- Archive 2021
- Archive 2020
- Archive 2019
- Archive 2017
- Archive 2016
- Archive 2015
- Archive 2014
- Archive 2013
- BackupChain (German)
- German Help Pages
- BackupChain (Greek)
- BackupChain (Spanish)
- BackupChain (French)
- BackupChain (Dutch)
- BackupChain (Italian)
- BackupChain is an all-in-one, reliable backup solution for Windows and Hyper-V that is more affordable than Veeam, Acronis, and Altaro.
Other Backup How-To Guides
- Carbonite vs. Acronis vs. BackupChain Cloud Backup Plans Review
- USB Disks and Hyper-V: How to Use, Pros and Cons
- Hyper-V Dynamic Disk Pros and Cons
- Hyper-V Backup for Windows 11, Windows 10, and Windows 8
- How to Turn Off Windows 10 Upgrade Notification and Icon
- Server 2012 Pulled into Saved State With Server 2008 R2 Host
- Bit Rot & Data Loss: Are You Aware of Its Damage Potential?
- 6 Common Cloud Backup Storage Pitfalls You Should Know
- Low-Cost Backup Software and Cloud Storage Solution
- How to Restore a File Based Backup of Hyper-V
- Automatic Hyper-V Backup on a Schedule
- Hyper-V Pass-through Disk: Pros and Cons
- VSS Crash and Application Consistency for Hyper-V and VMware Backups
- Protection Against Ransomware, CryptoLocker, Trojans and Viruses
- Boot Hyper-V Server 2019, 2016 from USB Stick or Drive
- List of 12 Virtual Backup Software Vendors
- Deduplication of Virtual Machine Backups in Hyper-V and VMware
- Copy Long Path Names and Deep Folders over 240 Characters
- 18 Hyper-V Tips & Strategies You Need to Know
- Backup Hyper-V on USB External Hard Drive Pros and Cons