User guide

244 | Glossary
Core
The AppAssure 5 Core is the central component of the AppAssure architecture. The Core
provides the essential services for backup, recovery, retention, replication, archival, and
management. In the context of replication, the Core is also called a source core. The source
core is the originating core, while the target core is the destination.
Database Availability Group (DAG)
A set of up to 16 Microsoft Exchange Server 2010 Mailbox servers that provide automatic,
database-level recovery from a database, server, or network failure. DAGs use continuous
replication and a subset of Windows failover clustering technologies to provide high
availability and site resilience. Mailbox servers in a DAG monitor each other for failures.
When a Mailbox server is added to a DAG, it works with the other servers in the DAG to
provide automatic, database-level recovery from database failures.
Encryption
Data is encrypted with the intent that it is only accessible to authorized users who have the
appropriate decryption key. Data is encrypted using 256-bit AES in Cipher Block Chaining
(CBC) mode. In CBC, each block of data is XORed with the previous ciphertext block before
being encrypted, this way each new ciphertext block depends on all preceding plaintext
blocks. A passphrase is used as an initialization vector.
Global Deduplication
The Storage Networking Industry Association (SNIA) defines data deduplication as the
replacement of multiple copies of data—at variable levels of granularity—with references to
a shared copy to save storage space or bandwidth. The AppAssure Volume Manager
performs global data deduplication within a logical volume. The granularity level of
deduplication is 8 KB. The scope of deduplication in AppAssure is limited to protected
machines using the same repository and encryption key.
License Key
The license key, which is obtained when you register on AppAssure 5 License Portal for an
account is used access the license portal. From the AppAssure 5 License Portal, you can
download the AppAssure 5 Core and Agents, manage licenses and groups, track group
activity, register machines, create accounts, invite users, and generate reports.
License Portal
The AppAssure 5 License Portal is a Web interface where users and partners register,
download, activate, and manage AppAssure 5 licenses.
Live Recovery
AppAssure Live Recovery is an instant recovery technology for VMs and servers. It provides
near-continuous access to data volumes in a virtual or physical server, letting you recover
an entire volume with near-zero RTO and a RPO of minutes.
Local Console
The Local Console is a Web-based interface that lets you fully manage the AppAssure 5 Core.
Local Mount Utility
The Local Mount Utility (LMU) is a downloadable application that lets you mount a recovery
point on a remote AppAssure 5 Core from any machine.
Log Truncation
Log truncation is a function that is used to save space by removing log records from the
transaction log.