Cantech Cloud

CMP NVMe Storage Tier Upgrade & Downgrade Guide

Written by

Pavitra Italiya

in

Overview

CMP allows you to change the storage tier of supported NVMe volumes without detaching the disk, restarting the virtual machine, or causing downtime. Storage policy changes between Standard NVMe and Pro NVMe are applied live, allowing you to increase performance or reduce costs as your workload changes.

Supported Live Changes

  • Standard NVMe → Pro NVMe
  • Pro NVMe → Standard NVMe

No Downtime • No Data Loss • Live Storage Policy Change

Storage Tiers

Storage Tier Max IOPS Max Throughput Storage Architecture Live Tier Change
Eco NVMe 15,000 500 MB/s Erasure Coding ❌ Not Supported
Standard NVMe 25,000 1,000 MB/s 3× Replication ✅ Upgrade to Pro
Pro NVMe 50,000 2,000 MB/s 3× Replication ✅ Downgrade to Standard

Note: Eco NVMe uses Erasure Coding and cannot be converted to Standard or Pro using a live storage policy change. A new volume must be created, and the data must be migrated manually.

Before You Begin

  • Ensure you have access to the CMP Advanced Panel.
  • The storage policy option is not available in the standard CMP Dashboard.
  • The volume can remain attached to a running VM during the change.
  • No reboot or detachment is required.

Accessing the Advanced Panel

  • Log in to the CMP Dashboard.
  • Select the appropriate region.

Select your Region

  • Click the Advanced Panel (external link icon (↗) ) for your selected region.

Open the Advanced Panel

  • Navigate to Volumes.

Navigate to Volumes

Upgrade Standard NVMe to Pro NVMe

  • Open Volumes in the Advanced Panel.

Navigate to Volumes in the Advanced Panel

  • Select the volume you want to upgrade.

Click on the volume to open its detail panel

  • Locate the Storage Policy field under Properties.
  • Click the Edit (Pencil) icon.

Click the pencil icon to edit the Storage Policy

  • Select Pro NVMe from the drop-down menu.

Select Pro NVMe from the dropdown

  • Click Save (✓).

Confirm the selection and save

  • The storage policy is updated immediately.

Verify the upgrade is applied

Verify the upgrade is applied

Performance after upgrade

  • Up to 50,000 IOPS
  • Up to 2,000 MB/s throughput
  • Zero downtime
  • No interruption to the running virtual machine

Downgrade Pro NVMe to Standard NVMe

  • Open the desired volume from the Volumes section.

Navigate to the volume in the Advanced Panel

  • Click the Edit (Pencil) icon beside Storage Policy.

Click the pencil to open the editor

  • Choose Standard NVMe.

Select Standard NVMe from the dropdown

  • Click Save (✓).

Confirm and save the downgrade

  • The volume continues operating normally while the storage policy changes.

downgrade complete and confirmed

Performance after downgrade

  • Up to 25,000 IOPS
  • Up to 1,000 MB/s throughput
  • No data loss
  • No VM restart required

Rules & Limitations

Supported

  • Live upgrade from Standard NVMe to Pro NVMe
  • Live downgrade from Pro NVMe to Standard NVMe
  • Storage policy changes while the volume is attached
  • Immediate application of the selected storage tier

Not Supported

  • Eco NVMe → Standard NVMe
  • Eco NVMe → Pro NVMe
  • Standard/Pro → Eco NVMe
  • Storage policy changes from the standard CMP Dashboard
  • Partial volume policy changes

Conclusion

CMP allows seamless live storage tier changes between Standard NVMe and Pro NVMe without downtime, reboot, or data migration. Eco NVMe cannot be converted through a live policy change because it uses a different storage architecture and requires a new volume with manual data migration.

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