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Version: User Guides (Cloud)

Release Notes (Apr 24, 2025)

We’re thrilled to share that Zero-Downtime Migration is now available in Private Preview on Zilliz Cloud! Whether you need to upgrade your cluster or make a change to your deployment, such as switching from Capacity-optimized Compute Units (CU) to another option, you can effortlessly migrate your data without any service interruptions. Additionally, Zilliz BYOC has introduced several enhancements, allowing you to configure instance settings for your BYOC project and enable AWS PrivateLink for your cluster.

Seamless Data Migration with Minimal Service Interruption​

In previous releases, migrating data between clusters required carefully planned downtime, an obstacle for businesses with strict availability requirements. With Zero-Downtime Migration, Zilliz Cloud now eliminates this complexity, delivering a seamless, fully managed migration experience.

This feature uses a dual-stack strategy combining two components: a backup tool and Change Data Capture (CDC). The backup tool captures a consistent snapshot of your source cluster, while CDC continuously tracks and replicates new writes to the target cluster in real time.

Zilliz Cloud’s native migration flow ensures:

  • Consistency across historical data and real-time updates,

  • Correct event ordering and robust fault tolerance,

  • Protection against write conflicts, race conditions, and schema mismatches, and

  • Smooth state transitions between the source and target clusters throughout the migration process.

Zero-Downtime Migration is now available in Private Preview on the Zilliz Cloud console. Log in to start your first migration—no downtime required. For detailed operating procedures and limits, refer to Zero Downtime Migration.

In Zilliz BYOC projects, services are organized into several groups, including Search Services, Other Database Components, and Core Support Services. With this release, you can now define the instance types and quantities for each service group during project creation.

To simplify configuration, Zilliz BYOC offers four predefined project sizes—Small, Medium, Large, and X-Large—so you can select the option that best fits your workload requirements.

This release also introduces the ability to enable or disable AWS PrivateLink for secure, private connectivity from your VPCs to the Zilliz Cloud Control Plane. Note that PrivateLink is enabled by default.

For details on the configuration procedures, refer to Deploy BYOC on AWS and Deploy BYOC-I on AWS.

Other Enhancements​

Added a new RESTful API endpoint for you to modify the replica count of your cluster. For details, refer to Modify Cluster Replica.