Dell AppAssure: Backup and Recovery Glossary
| Backup 2.0 | Mountable Recovery Points | Replication Source |
Backup 2.0
It is analogous to the term “Web 2.0” but for backup. Dell AppAssure is the “Home of Backup 2.0”. Backup 2.0 solutions are automatic processes that run over high-speed networks, prevent the loss of data and work, ensure access to data, and minimize downtime.
Bare-metal Recovery
Bare metal recovery is the process of recovering a system that does not contain bootable OS software or before the OS has been booted.
Base Image
A base image represents an application consistent point-in-time block replica of a complete volume. Think of a base image as a large snapshot. Base images usually represent time zero and serve as the basis of any recovery point.
Continuous Application Protection
Continuous Application Protection technology protects the messaging servers in real-time by capturing all volume block I/O activity and indexing, compressing and storing the results on a Replay Recovery Server as point-in-time images.
Data Store
A data store (or Exchange Data Store) is a set of files that represents an Exchange email database, that contains users’ mailbox data.
Differentials
Differentials represents an application consistent point-in-time log of the block changes for a volume between base images. Differentials are delta changes from the last snapshot or base image and are additive on top of the base image.
EDB
An EDB is an Exchange data store file that contains emails.
Instant Volume Rollback (sometimes called Replay Live)
Replay offers a unique capability that dramatically reduces volume recovery times by virtualizing each application’s disk read/write operations onto a chosen recovery point while the recovery point is being restored to the physical disk in the background. This function allows for continuous application availability during hot online restores.
Mount Points
A mount point is a Windows term used to represent a volume that is mounted to an empty directory, i.e. the directory becomes the root of the volume. Replay leverages mount points as a mount option.
Mountable Recovery Points
Leveraging Replay continuous application protection capabilities, Replay serves up volume-based views into any point-in-time recovery points. These readable, writable, and recoverable volume-based views are virtual NTFS volumes that represent the protected server at any given point in time and are generated without impact to the on-line protected server.
Off-Site Backup
Moving backups to a remote location to protect against Replay Core and site failures.
Off-Site Disaster Recovery
The ability to recovery a site in a hosted environment. Our approach is to deliver using our virtual standby capability.
Perpetual Licenses
The standard approach to software licensing, buy upfront, pay once, your own a license to the software in perpetuity.
Physical Standby
Replay’s Physical Standby feature automatically transitions the messaging servers to a standby DR environment. It validates the application data and then replays the changes, block by block for all of the volumes, from the Replay recovery server. But unlike the Virtual Standby feature, Replay’s Physical Standby feature unwinds the recovery point into a standby physical or virtual machine booted into the Replay Recovery Console.
With the Replay Physical Standby feature, you can:
- Continually provide highly available Exchange environments directly from production physical Exchange environments.
- Guarantee that the Standby server is Exchange-corruption free.
- Provide quick and easy testing of DR preparedness.
Protected Server
A Windows workload, physical or virtual, that is protected by a Replay Agent. Supported environments include Windows® Server 2008 R2, Windows® 2008 Server, Windows® 2003 Server, Windows 7, Vista.
Recovery Points
A recovery point is a collection of differentials and a base image that represent an application consistent recovery point for a volume or set of volumes. For example, an Exchange storage group may span volumes and hence must be captured and recovered as a synchronized group. Recovery points contain base images and differentials for each volume on the protected server.
Replay Core
Processes and stores compressed and deduplicated recovery points as incremental forever images of the protected servers. Cores can be installed on the protected server or on a dedicated server or worker virtual machine. This role performs many functions including creating virtual standby environments, application validation, restores and replication.
Replication Schedule
The time window when the recovery points are replicated. It is a fixed time for weekdays and a fixed time for weekends.
Replication Source
The server from where the replication of the recovery points is initiated. Replication is always performed between two Replay Cores.
Replication Target
The server that is the destination of the replicated recovery points.
Rollbacks
Rollbacks are the process of rolling back or recovering a server, volume, storage group, data store, directory, or file to a particular point in time.
STM
An STM is an Exchange data store file that contains streaming data such as attachments. STM does not exist in Exchange 2007 environments.
Storage Groups
An STM is an Exchange data store file that contains streaming data such as attachments. STM does not exist in Exchange 2007 environments.
Subscription Licenses
A method of licensing software. Subscriptions are license agreements defined for a set period of time, monthly, quarterly, annually.
Unfold
Replay has the ability to unfold a complete server environment on a new machine or virtual server environment in the event of a complete system failure. A complete system environment, includes the OS environment, the application and the applications data. You can unfold domain controllers, BlackBerry servers, Exchange 2007 and Exchange 2003 mailbox server and all role servers.
Virtual Standby
Replay Virtual Standby automatically transitions the messaging servers to a virtualized DR environment, whether it’s running on physical equipment or within a virtual machine. For Exchange 2007 and Exchange 2003 server, Replay validates the application data by continually performing Exchange data-store mountability checks. It then replays the changes, block by block, from the Replay recovery server into a virtualized environment, so that the application service can be restored to users with a simple reboot of the virtual machine. The current version supports VMware Server 2.1 and Workstation 6.x formats. Support for native VMware ESX virtual machines is available in Replay Beta 2.2.
