Dell PowerProtect DD Deploy 2023 key terms

The proprietary log-structured filesystem that stores backup data as immutable chunks on PowerProtect DD appliances. It enables inline deduplication and compression before data lands on disk, so only unique segments consume capacity.

A process that identifies and removes duplicate data segments as they stream into the appliance, writing only unique chunks to disk. Because redundancy is eliminated on ingest, capacity savings appear immediately rather than after a later post-processing pass.

A variable-length segment of backup data produced by the deduplication engine. Each chunk is fingerprinted with a hash, and identical fingerprints are stored once and referenced many times within the filesystem.

A cryptographic digest computed over a data chunk and used as its identity during deduplication. Matching fingerprints let the appliance substitute a pointer for duplicate data instead of writing another physical copy.

A second-stage reduction applied to unique data after deduplication, shrinking the bytes that must be stored or replicated. It is typically enabled by default and complements deduplication rather than replacing it.

A scheduled background process that reclaims space held by chunks no longer referenced by any file. Cleaning examines the filesystem index, removes unreferenced segments, and updates capacity statistics shown to administrators.

A set of integrity safeguards that continuously verify data as it is written and read, including end-to-end checks and write verification. It detects and helps recover from corruption so backups remain restorable.

A software library and protocol that lets backup applications send data to a DD appliance while distributing part of the deduplication work to the client. It reduces network traffic and improves throughput compared with plain NFS or CIFS writes.

The DD Boost feature in which the backup client performs chunking and fingerprinting locally, sending only unique segments to the appliance. This offloads CPU work from the array and lowers bandwidth consumption.

A logical partition inside a DD appliance that owns its own namespace, quotas, and replication context. Multiple backup applications or tenants can be isolated by assigning each its own MTree.

A mountable filesystem that presents DD Boost storage to Linux or Unix hosts as a local directory. It gives applications DD Boost efficiency without requiring native API integration.

A shared directory on the appliance made available to Unix and Linux clients over the Network File System protocol. Access is controlled by export policy entries listing permitted hosts and options.

A shared directory on the appliance published to Windows clients using the SMB/CIFS protocol. Administrators grant access by adding clients or users to the share's access list.

A process that copies deduplicated data from one DD system to another over the network so a remote site holds a recoverable replica. Only unique, compressed segments cross the link, so bandwidth use is far below raw backup volume.

The unit of replication pairing, typically an MTree on the source matched to a destination MTree on a remote system. Contexts can be configured for directory, MTree, or collection replication types.

A replication option that further reduces traffic by aggregating metadata and data into larger, more efficient transfers. It is intended for slow or congested WAN links between source and destination systems.

A replication mode that mirrors an entire source system's data to a destination system, which can then be promoted to serve clients after failover. It is used for full-system disaster recovery rather than per-MTree copies.

A point-in-time, space-efficient image of filesystem data that preserves a consistent view for backup or restore. Snapshots consume little space until referenced data changes.

A policy that prevents deletion or modification of stored files for a defined period, supporting tamper-resistant retention for compliance. Locked data cannot be expired early even by an administrator.

A configured limit on the logical or physical capacity an MTree or user may consume. Quotas prevent one workload from exhausting shared appliance space.

The percentage of usable capacity currently consumed by stored data, reported by system status commands and the management interface. Administrators watch it to plan expansions and schedule cleaning.

The process of installing and activating entitlement keys that enable capacity or features such as DD Boost, replication, or extended retention. Without a valid license the corresponding capability stays disabled.

An entitlement that authorizes a specific amount of usable storage on the appliance. Exceeding the licensed capacity requires purchasing and installing an additional or larger license.

An external disk enclosure cabled to the appliance to add storage capacity beyond the internal drives. Shelf models, cabling, and supported quantities depend on the controller platform.

A group of physical disks configured together to provide storage for the filesystem. Packs are added or replaced as units and must match supported drive types for the platform.

A disk configuration that combines drives for redundancy and performance, protecting against single-drive failure. DD appliances use specific supported RAID levels and rebuild behavior that administrators should understand.

The condition and recovery process when a drive fails and the system reconstructs its data onto a spare or replacement disk. Monitoring alerts and rebuild progress are key operational checks.

The dedicated Ethernet port used for administrative access such as SSH, the web UI, and system commands. It is configured with an IP address during initial setup and kept separate from data traffic.

The network port that carries backup, restore, and replication traffic between clients and the appliance. It is configured with addressing, bonding, and VLAN settings appropriate to the data network.

Combining multiple physical network ports into one logical interface for higher throughput and redundancy. The appliance configuration must match the switch's aggregation mode to avoid connectivity problems.

Adding an 802.1Q tag to network frames so the appliance can participate in a specific virtual LAN. Correct tagging on both the appliance interface and the switch port is required for connectivity.

The first-boot setup that assigns hostname, network addressing, time zone, and administrator credentials to a new appliance. It is typically performed through the serial console or the configuration wizard.

The privileged local login used to manage the appliance, including creating other users and changing system settings. Strong credentials and controlled distribution are essential because the account has full control.

The mechanisms that verify user identity before granting access, including local accounts and external directory services. Correct configuration prevents unauthorized access to shares, MTrees, and administrative functions.

Automatic messages the appliance sends when thresholds or faults occur, such as capacity limits or disk failures. Notifications can be delivered by email or SNMP to operations teams.

A protocol the appliance uses to send traps and expose status information to monitoring platforms. Community strings and trap destinations must be configured for alerts to reach management tools.

An automated reporting feature that packages system status and logs and transmits them to support or a configured mail destination. It helps diagnose issues and can trigger proactive service actions.

Gathering system logs and diagnostic bundles for analysis when troubleshooting. Administrators use it to correlate events across the appliance and to supply evidence to support engineers.