DL4300 Appliance
Glossary
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The Storage Networking Industry Association (SNIA) defines compression as the process of encoding data to
reduce its size.
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Core
The Rapid Recovery Core is the central component of the Rapid Recovery architecture. The Core provides the
essential services for backup, recovery, retention, replication, archiving, 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 (another Rapid Recovery Core on its own dedicated server, where protected machines or clusters
are replicated).
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Core Console
The Rapid Recovery Core Console is a Web-based interface that lets you fully manage the Rapid Recovery Core.
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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.
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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.
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event
An event is a process that is logged by the Core. Events can be viewed within the Core Console by clicking the
(Events) icon from the icon bar. The default view when you click the
(Events) icon shows the Tasks
page. This view shows events related to a job. Priority events about which you are notified can be viewed on
the Alerts page. A log of all events appears in the Journal page. By setting up or modifying existing notification
groups, you can customize notification for any event. This action raises the priority of the event by displaying it on
the Alerts page. Members of a notification group are notified of events using the notification methods set in the
notification options for the group.
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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 Rapid Recovery Volume Manager performs global data deduplication within a logical volume. The
granularity level of deduplication is 8 KB. The scope of deduplication in Rapid Recovery is limited to protected
machines using the same repository and encryption key.
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incremental snapshot
Incremental snapshots are backups consisting only of data changed on the protected machine since the last
backup. They are saved to the Core regularly, based on the interval defined (for example, every 60 minutes). For
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