HCX migration stuck at 0% during initial sync, then jumps directly to 100% on completion.

Products

• VMware HCX

Issue/Introduction

HCX migration during Initial sync phase from the UI shows no progress, it remains at 0% and then jumps directly to 100% upon completion.

HCX dashboard, Services > Migration

Environment

VMware HCX

Cause

While the migration is underway, the Progress column displays a progress bar with the percentage of replication completed for a specific virtual machine.

This estimate is based on sampling the underlying metrics of the environment, such as bytes transferred, rate of transfer, network throughput, and number of disks.

Resolution

The sampling interval between estimates varies with the size of the migrated virtual machine:

Virtual Machine Size	Estimate Interval
Less than 50 GB	Every 1 1/2 minutes.
Greater than or equal to 50 GB but less than 1 TB	Every 5 minutes.
Greater than or equal to 1 TB	Every 15 minutes.

 

Note: The estimate interval begins after the system has gathered the underlying metrics and completed calculations, meaning there may appear to be a delay in presenting the initial estimate. For relatively small transfers, the transfer may complete before providing an estimate.

Additional Information

Monitoring Migration Progress with HCX