IBM logoEnterprise Cloud Management SupportContact Us
ArticlesArticles Most Popular ArticlesMost Popular Articles Most Helpful ArticlesMost Helpful Articles Submit A QuestionSubmit A Question
RSS Feeds
DrillDown Icon Table of Contents Back
 . . . . . . . . . . . . .
DrillDown Icon Release Notes
DrillDown Icon Known Issues
DrillDown Icon Policies
DrillDown Icon Registration and Login
DrillDown Icon Infinicenter Console
DrillDown Icon Environments
DrillDown Icon Compute Pools
DrillDown Icon Resources Tab
DrillDown Icon Devices Tab
DrillDown Icon Layout
DrillDown Icon Create Virtual Machines
DrillDown Icon VPN Connect
DrillDown Icon Manage Security Groups
DrillDown Icon Server Tasks
DrillDown Icon Change Server Power State
DrillDown Icon Configure Server
DrillDown Icon Copy Virtual Machines
DrillDown Icon Retry
DrillDown Icon Delete Server
DrillDown Icon Move Devices
DrillDown Icon Relocate a Virtual Machine
DrillDown Icon Snapshots
DrillDown Icon Enable Snapshots
DrillDown Icon Edit Snapshots
DrillDown Icon Disable Snapshots
DrillDown Icon Revert Snapshots
DrillDown Icon Delete Snapshots
DrillDown Icon On-Demand Snapshot
DrillDown Icon Rename Devices
DrillDown Icon View Tasks
DrillDown Icon Convert License
DrillDown Icon Manage IPs
DrillDown Icon Assign Security Groups
DrillDown Icon Cloud Services
DrillDown Icon Connect to the Console of a Virtual Machine
DrillDown Icon Device Tags
DrillDown Icon Install VMware Tools
DrillDown Icon Mount ISO
DrillDown Icon Upgrade VM Hardware
DrillDown Icon Network Tab
DrillDown Icon Cloud Services Tab
DrillDown Icon Resource Alerts
DrillDown Icon My Account
DrillDown Icon Enterprise Cloud API
DrillDown Icon Best Practices
DrillDown Icon FAQs
DrillDown Icon Troubleshooting
  Email This ArticlePrint PreviewPrint Current Article and All Sub-Articles
 
Manage Virtual Machine Snapshots

Manage Virtual Machine Snapshots

Introduction

A virtual machine snapshot preserves the state and data of a virtual machine at a specific point in time. The data includes all of the files that make up the virtual machine. Files include disks and other devices, such as virtual network interface cards.

Note: When snapshots are enabled on a virtual machine, its configurations cannot change, although it can be viewed. The virtual machine can, however, be copied at its current, active state.

Snapshots create child files that contain all the changes made since the last snapshot:

  • Child files can grow up to the size of the source virtual disks; storage fees are incurred for both the source virtual disks and all child files.
  • Tracking changes to the source virtual disk in the child file incurs a performance penalty on the virtual machine.
  • Changes are added to child files until snapshots are disabled and all snapshots are removed from the virtual machine.

Snapshot storage is included when determining whether a new virtual machine is within purchase storage limits in reserved compute pools when creating, copying, or configuring a virtual machine. Snapshot storage is billed at the size of the source virtual disks for the active child file and at actual usage for all other child files. You can view total storage consumption including snapshots on the Resources and Virtual Machine Storage Details tabs and the snapshot storage consumption on the Configure Server and Manage Snapshots dialogs. The dialogs also show the storage cost for instance-based virtual machines.

Note: Snapshot storage is only fully recovered when all snapshots for a virtual machine are deleted and snapshots disabled.

Snapshots can be enabled when a virtual machine is powered on or powered off. Snapshots are taken at every interval when powered on but only at the first interval after powering off.

Snapshots created by Global Support Services, called unscheduled snapshots, appear in Infinicenter Console with an indicator, Icon warning, to identify its initiation outside Infinicenter Console. Unscheduled snapshots are included in the Snapshots to Capture limit. Unlike scheduled snapshots, unscheduled snapshots are not removed when a new snapshot is taken. As a consequence, if the Snapshots to Capture limit is 1 and an unscheduled snapshot is taken, no further scheduled snapshots will occur; you would need to delete the unscheduled snapshot or raise the Snapshots to Capture limit for scheduled snapshots to resume.

You can view a history of snapshots up to the maximum number selected, including unscheduled snapshots, on the Manage Snapshots dialog.

You can view a history of snapshot activities in the virtual machine task history. Virtual machine task history includes snapshots skipped due to the virtual machine powered off, unscheduled snapshots that meet the chosen Snapshots to Capture limit, or insufficient storage. Insufficient storage occurs in reserved compute pools, purchased storage; trial instance-based compute pools, trial provisioned storage; or infrastructure storage. You can enable snapshots if insufficient storage, but a warning is issued and all snapshots are skipped until storage is available.

If you have appropriate permissions you can revert a virtual machine to a specific prior snapshot, which restores the state and disks to the condition at the snapshot.

If you have appropriate permissions you can delete a specific snapshot and when you delete a virtual machine all its snapshots are also deleted.

Note: Deleting a snapshot does not necessarily reduce the storage consumed by snapshots.

Navigate

To manage virtual machine snapshots:

  1. Select a virtual machine.
  2. The actions available for the virtual machine appear in the selection pane.

  3. Click Administrative Tasks on the selection pane.
  4. Click Snapshots.

You can also manage virtual machine snapshots from the context menu.

  1. Right-click a virtual machine.
  2. The context menu appears.

  3. Click Administrative Tasks on the context menu.
  4. Click Snapshots.
Sub Articles