Always-On Replication Solution - Protect Your Data - Zerto

Always-on Replication

At the core of Zerto lives always-on replication, the engine delivering continuous backup and industry-leading disaster recovery

How Does Zerto Replication Work?

Learn more about how Zerto’s industry-best, software-only, scale-out architecture can help you protect applications while minimizing data loss.

How It All Started

In 2011, Zerto introduced hypervisor-based replication to the world. By moving replication up the stack from the storage layer and into the hypervisor, Zerto created the first and only solution that delivers enterprise-class, always-on replication as well as backup and disaster recovery (DR) capabilities for virtualized datacenters and the cloud.

Why Replicate Within the Hypervisor?

Unlike some data protection solutions that use cumbersome snapshots and agents, Zerto’s solution provides continuous replication with zero impact on application performance recovery. 

Hypervisor-based replication natively integrates with all supported platforms, meaning it is hardware agnostic and compatible with many hypervisors and cloud platforms. It also supports the full breadth of capabilities made possible by virtualization, including high availability, clustering, vMotions, etc. 

Zerto Business and Operational Benefits

How Zerto Replication Works

The following components reside at the heart of the Zerto platform’s replication technology:

Zerto Virtual Manager (ZVM)

The management server integrates with any hypervisor management platform and has an intuitive interface that orchestrates user-initiated operations with simplicity.

Virtual Replication Appliance (VRA)

Our scale-out replication appliance with built-in WAN optimization, encryption, and Quality of Service, replicates every change generated to the target journal and is responsible for copying data to the long-term retention repository.

Zerto Cloud Appliance (ZCA)

In public clouds, an all-in-one cloud appliance combines management and replication components. It integrates natively, using cost-efficient storage offerings, APIs, and cloud scaling features.

In summary, the VRA captures and makes a copy of the I/O before it leaves the hypervisor. It then sends this copy to a VRA on the target site before committing the I/O to the journal in the order that it was generated to ensure write-order fidelity. As the journal fills, it then commits the oldest recovery points to the replica disk.

How Zerto Replication Works

Zerto Platform Components

Zerto Near-synchronous Replication for Lowest RPOs and RTOs

The Zerto’s software-only approach achieves nearly identical replication benefits found in expensive hardware-based synchronous replication solutions, with RTOs of minutes and RPOs of seconds. On top of that, software-based asynchronous replication is much cheaper and more practical than its hardware counterpart—and it’s easier to deploy and support.

RTO and RPO explained

Replication Technologies: Synchronous, Asynchronous and Near-Synchronous

Enable Cross-hypervisor and Cross-cloud Replication

With automatic, on-the-fly conversion of virtual machines (VMs), you no longer need to match hypervisors between your datacenters. This allows you to utilize the hypervisor of your choice—depending on your workload, cost, performance, and availability—without being locked in by technical limitations.

The Zerto’s agnostic approach doesn’t stop at hypervisors; it also extends into the cloud. With on-the-fly cloud translation, you can move or recover any workload to or from any supported cloud platform, with no manual conversion process required.

Cross-hypervisor Replication

One-to-Many: Multi-site Replication

Zerto’s innovative one-to-many feature allows a VM to simultaneously replicate to several target platforms—including VMware vSphere, Microsoft Hyper-V, Azure, AWS, Google, or over 450 other Zerto-managed service providers—while replicating a local copy or second remote site.

Protect Interdependent Applications

One-to-many replication maintains a local replica of individual applications, with a protection group at the remote site for all interdependent applications. Write-order fidelity operations ensure disk, VM, and application consistency, enabling recovery of the entire datacenter to the exact same point in time, in minutes.

Migrate without Risk

One-to-many enables replication of applications, VMs, and data to the new location without breaking the existing replication and protection. Validate your migration project without impacting production by testing and proving recovery and performance in the new site, then complete the actual migration faster and without risk.

True Multi-cloud

Transform your business and replicate applications, VMs, and data within a local datacenter, to a secondary datacenter, and to over 450+ clouds—including Microsoft Azure, AWS, and Google Cloud. Configure different journal retention policies, enabling up to 30 days of point-in-time recovery using cheap S3 or Blob storage in the public cloud.

Key Benefits

Unmatched Replication Granularity

Replicate at the correct level of any virtual entity—a single machine, group, or application.

Scalable to Any Size Infrastructure

Easily deploy and manage Zerto’s always-on replication regardless of infrastructure size or expansion speed.

Works with Any Hardware or Cloud

The platform- and hardware-agnostic Zerto approach enables near-synchronous replication to virtually all storage arrays.

Ease of Use

The software-only Zerto solution resides in the hypervisor, enabling centralized management from the virtual management console.

What’s Next?

Have a question about our product or capabilities? Contact us, we are here to help!

See Zerto in Action

Check out these short videos to see what Zerto can do for you.

Try Zerto

Want to give Zerto a try? Get a free 14-day license or access to our on-demand labs.


After Replication: Recovery

Learn about Zerto’s journal-based recovery and how it can deliver the industry fastest RPOs and RTOs.

Backup versus Replication

Learn about the main differences between backup and replication.

Zerto for Multi-Cloud and Hybrid Cloud

Multi-cloud capability with replication to, from, and between sites, even across regions or to other public clouds.