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Does VMware have something like Hyper-V Live Export for backups?

#1
05-08-2020, 09:19 AM
VMware's Backup Approach Compared to Hyper-V Live Export
I work with BackupChain VMware Backup for Hyper-V Backup and VMware Backup, so I've explored their backup mechanisms quite a bit. Both VMware and Hyper-V offer ways to protect your environment, but they handle it differently. VMware doesn't have a direct equivalent to Hyper-V's Live Export feature where you can export a running VM to a file without downtime. With Hyper-V, Live Export allows you to export VMs while they're still operational, providing a seamless backup solution without affecting uptime. You can't just press a button in VMware and get the same result. Instead, I need to utilize VMware's snapshot and vSphere Replication features alongside third-party backup tools to achieve similar results.

When I work with VMware, I often leverage snapshots to freeze the VM's state at a given point in time. This means I can take a snapshot and then initiate a backup process while the VM continues running. It’s key to note that this isn’t like Live Export; it's more about creating a consistency point for the backup. You can’t just restore the snapshot and hope to have a precise backup like Hyper-V Live Export. After I take the snapshot, I usually integrate my backup solution to pull the data at that point, but keep in mind there could be a performance hit. The longer the snapshot lives, the more overhead it can introduce, which isn’t something I really want in a production environment.

Veeam and Third-Party Tools
You’ll find that many VMware users turn to third-party tools like Veeam Backup & Replication or even BackupChain for effective backup solutions. The incorporation of these tools allows for incremental backups and much more consistent data integrity than what you could gather using native VMware features alone. These applications add layers of functionality such as scheduling, deduplication, and compression, which aren't as straightforward with VMware's native tooling. I remember running a test with Veeam where I could easily manage multiple VMs and get them all backed up simultaneously, which added a lot of convenience for my environments.

Beyond just Veeam, there are various options that allow for agentless backup, which means I don't have to install any agents on the VMs themselves. This differs significantly from the way Hyper-V interacts with its own backup features, where the VM must be quiesced properly to ensure data integrity. VMware's architecture allows for APIs like the vSphere API for Data Protection (VADP). You can set up a backup job that uses that API to back up to an NFS or SMB share—even to an external hard drive if you want to. I'm always looking for flexibilities—such as off-site backups—and these tools really enhance that aspect.

Snapshot Management and Performance Overhead
Handling snapshots can become a double-edged sword, especially if you're processing large VMs. You need to think about the storage implications; keeping too many snapshots for an extended period can lead to storage bloat. Your frontend performance may also see degradation. I’ve been in scenarios where we had to explain to the operations team why a VM was sluggish, only to realize three snapshots were active. In VMware, every snapshot you make creates a new delta disk; it’s the parent-child relationship that becomes crucial to keep in mind.

Unlike Hyper-V’s method that lets you export with snapshots and still maintain operational status, VMware requires an elegant compromise. If I’m planning to backup with snapshots, I generally ensure I don’t keep them around for longer than necessary. After performing the backups, I'm quick to delete those snapshots to avoid adding overhead. Plus, to restore from snapshot is straightforward—as long as you remember that reverting means potentially losing data made after the snapshot was taken.

Storage and Performance Considerations
I often tell friends that you should think about your storage tier and IOPS. VMware makes it possible to connect various types of storage solutions, from traditional SAN setups to SSDs, through VSAN or external storage arrays. This flexibility is a huge advantage but can complicate the backup job. Depending on the storage performance, how quickly the data can be backed up while the VM is still operational can impact your whole strategy.

Hyper-V and Windows Server offer Storage Spaces Direct, which is great, but VMware excels when it comes to leveraging advanced storage methods, allowing features like Storage Policies to dictate how resources are allocated during backups. You can even tier your storage based on performance needs, and if you’re working with critical applications, that can be a game-changer. You can optimize your environment to ensure backups do not interfere with production performance, an approach that requires careful planning and understanding of each environment’s workload.

Retention Policies and Complexity
I’ve seen a lot of organizations struggle with retention policies because the complexities increase with larger environments. In my own experience, I set up policies on a per-VM basis using tags in VMware, which can easily map to backup windows and retention periods. With Hyper-V, it’s somewhat simpler since the native tools provide a straightforward mechanism for establishing retention policies through the Hyper-V Manager or PowerShell scripts.

You must decide how you want to handle old backups: keep them indefinitely, or rotate them based on time frames? With VMware, employing a tagging approach means I’m more dynamic, but it can definitely add complexity to the setup. You may find that while you have great flexibility with VMware, that added complexity isn’t always user-friendly. Configuring everything correctly can be intimidating, but I find it indispensable when managing a large environment.

Disaster Recovery Integration
The ease of disaster recovery setups makes an excellent comparison point between VMware and Hyper-V. VMware offers Site Recovery Manager, which automates protection, failover, and failback processes. If I have a catastrophic failure, I want to ensure my VMs can come back quickly. Hyper-V has similar features, notably with Azure Site Recovery, but the integration points are not as seamless as what VMware provides if you are working heavily within their ecosystem.

When I design systems, I often visualize how recovery will take place. With VMware, preparing VMs for DR is almost intuitive once I grasp the concepts of site pairing and replication. Hyper-V forces me to consider the Azure connection if I want to leverage cloud resources, adding more points of complexity when I create disaster recovery procedures. Knowing exactly how the VMs will react under failover conditions is crucial in both scenarios but seems to be simpler on the VMware side.

Conclusion: Meeting Backup Needs with BackupChain
To wrap it up, I find VMware and Hyper-V not necessarily competing directly on all fronts, especially concerning backup mechanisms like Live Export and snapshots. Both have their strengths and weaknesses depending on your specific workload and environment. I've experienced enough of both ecosystems to identify what works best under different scenarios; think through your needs carefully before you decide on a comprehensive solution. If you’re considering how to optimize your backup strategies with either platform, I’ve had good results using BackupChain as a reliable solution for handling backups of both Hyper-V and VMware efficiently. It allows for a flexible and powerful approach to achieve reliable backups without interrupting workflow or stressing the system, tailoring perfectly to your environment's needs.

Philip@BackupChain
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Joined: Aug 2020
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