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Snapshot & backup schedule

A snapshot captures the state of a VM or volume at a point in time. Restoring from a snapshot rolls the system back to exactly that point — very useful when:

  • You're about to make a big change (OS update, new release, database migration).
  • Something broke and you need to roll back.
  • You want to spin up a new VM that's identical to an existing one.

A backup schedule automates snapshot creation on a recurring basis — no need to remember to do it by hand.

VM snapshot (Server Snapshot)​

A VM snapshot captures the entire system disk. Use it to restore the VM or to create a new VM from this snapshot.

Step 1. Open the VM detail page​

Go to Cloud Server → Servers and click the VM.

Open the VM detail page

Step 2. Open Nâng cao → Snapshot server​

Open the Nâng cao (Advanced) dropdown → pick Snapshot server. Click Tạo snapshot.

Snapshot máy chủ with the Tạo snapshot button

Step 3. Name and confirm​

Use a memorable name (for example before-upgrade-2026-05-28) in the Tên snapshot field, then click Tạo snapshot.

Snapshot name form

The process takes a few minutes depending on disk size. The snapshot then appears in the list and can be used to create a new VM.

Volume snapshot​

A volume snapshot captures the data on a single volume. It's the right fit when you need finer-grained backups per volume (for example, snapshotting a database volume before a migration).

Step 1. Open Volume Snapshot​

Go to Cloud Server → Volume Snapshot and click + Create Snapshot.

Volume Snapshot page with the Create Snapshot button

Step 2. Fill in the form​

  • Volume — the volume to snapshot.
  • Snapshot name — make it clear when and why you took it.
  • Billing cycle — how long the snapshot is retained.

Create Volume Snapshot form

Click Confirm to create.

Automated backup schedule​

A backup schedule creates VM snapshots on a recurring basis — there's always a recent snapshot to fall back on without any manual work.

Step 1. Open Backup schedule​

Go to Cloud Server → Backup Schedule and click + Create backup schedule.

Backup schedule page with the Create schedule button

Step 2. Configure the schedule​

FieldMeaning
VMThe VM to back up automatically
Start timeThe hour the backup runs each day — pick an off-peak time (e.g. 03:00)
FrequencyDaily / weekly / monthly
Max retained backupsBeyond this number, the oldest snapshot is auto-deleted

Automated backup schedule form

Click Confirm to activate. The schedule then runs automatically at the configured time.

Restore from a snapshot​

The safe path — create new from the snapshot​

This is the safe path — the original VM and the original volume stay intact until you delete them yourself.

Direct restore (overwrites the current VM)​

In the ⋯ menu of any snapshot on the Snapshot server tab (only available while the snapshot is Hoạt động / Active), Khôi phục (Restore) rolls the current VM back to exactly that snapshot's state — overwriting current data instead of creating a new VM. To confirm, you type the random confirmation code the portal shows. The warnings shown are:

  • The VM will roll back to the snapshot's state.
  • Any data created after the snapshot will be lost.
  • The VM will reboot during the restore.
  • Attached volumes are not affected.
  • This action cannot be undone.

Only use this when you're sure you want that exact point in time; if unsure, prefer creating a new VM as described above so you don't lose the current state.

Heads up
  • When you delete the source Server/volume, related snapshots are deleted too. Be careful if you need the snapshot as a backup.
  • The safest restore path is to spin up a new VM/volume from the snapshot, verify it, then delete the original.