White Paper   Change Block Comparison Technology NEW!

ActiveImage Protector uses the Volume Shadow Copy Service API to perform image-based backups.
Using this snapshot technology, it can quickly create backups even while the system is running.
After a full backup, only data that has changed will be backed up as incremental image files in subsequent backups. This incremental backup technology, a critical component, has been redesigned.

In older version of ActiveImage Protector, Change Block Tracking Technology was used to keep track of the new changes in the volumes in order to prepare for next scheduled incremental backup. So how does the Change Block Tracking Technology works?

Conventional Incremental Backup Technology

In prior versions of ActiveImage Protector, the changed data tracking was managed in the AIPMAP file after a full backup.

The ActiveImage tracking driver monitors the system in real time flagging all changes written to a volume. Data changes such as updating, deleting or moving files are recorded to a file named AIPMAP.

When a subsequent incremental backup occurs, the changes indicated in the AIPMAP are backed up as an incremental file. After an incremental backup is complete, the AIPMAP is initialized and the real-time monitoring starts again.

In this process, AIPMAP gets updated every time a backup is executed.

Throughout years of experiences and deployment in large scale environment, we considered the following specification changes as problems in conventional tracking technology.

  • Is it possible to reduce the resources of real-time monitoring and minimize system load?
  • Can we create multiple backup schedules for one backup source?
  • When performing backups directly to remote sites, it is often the case full backup is performed in conjunction with continuous incremental backup. After a full backup is performed locally, and transported to a remote site, is it possible to continue the backup chain at remote site?
  • ActiveImage Protector can continue to add incremental backup files to image chain across multiple OSes when making a backup of USB hard disk.
  • How can we realize a more stable backup and restore service?

Changed Block Comparison™ Technology (CBC) New ActiveImage CORE Technology

CBC is a completely new ActiveImage backup core technology. Unlike the conventional real-time driver approach, other than when a backup is executed CBC is not running, thereby reducing the load during normal backup operations.

CBC doesnʼ t manage data as the driver. changed block information is created accurately by analyzing and comparing existing backup files with current disk information at the time of the backup operation.

Major databases are also supported. It is also now possible to support storage change locations in Full + continuous incremental backup scenarios and multiple schedules with the same source.

Change Block Technology Benefits

  • Minimum resource consumption on the system. CBC is not  monitoring as a driver and is usually completely silent.
  • A driverless specification where monitoring is not done with a driver. No driver to install minimizes system impact during installation.
  • Major databases, domain environments, etc. can also be backed up and restored correctly.
  • Elimination of tracking driver limitations of one task per one source, multiple operations on backups sources offers more schedule flexibility.
  • Incremental file chain integrity can maintained even if the file chain location changes after running a backup.
  • Full and incremental backups on multiple PCs can be saved to a single USB hard disk, etc.