Creating multiple parallel backup jobs grouped by application or change rate is a best practice. It balances load across the PowerProtect Data Manager deployment, improves efficiency by backing up VMs with similar characteristics together, and provides resilience (a failure in one job doesn’t impact all backups). A single large job creates a bottleneck and risk. Forever-incremental can lead to long restores and isn’t always suitable. Increasing retention doesn’t address performance.

The ‘Logical Data In’ represents the pre-deduplicated/compressed data size from the backup application’s perspective. The ‘Physical Data In’ is the amount of unique data actually written to disk after Data Domain’s deduplication and compression. A large difference between these two metrics is the primary indicator of high deduplication and compression efficiency, which is a core function and benefit of Data Domain.

The Cyber Recovery Vault is the key architectural component designed for this purpose. It is an isolated environment, logically or physically air-gapped from the production network. Backup data is replicated into the vault, where it is stored on immutable, WORM (Write-Once, Read-Many) storage. This ensures the data copy cannot be altered, encrypted by ransomware, or deleted by any user or process for the defined retention period, meeting the core security requirement.

The Avamar Utility Node is a critical component of the Avamar server. Its primary role is to host the deduplication database (often referred to as the ‘hfs’ or ‘hash’ database) and manage the overall backup process. It coordinates client connections, manages the storage nodes, and handles the deduplication logic. The other functions are performed by other components like the Administration Node (web UI), Storage Nodes (data storage), or external proxies.

Virtual Synthetic Full (VSF) backups are a space-efficient feature that create a logical full backup from previous full and incremental backups, without moving all the data. The key prerequisite is that an initial, traditional full backup must already exist on the Data Domain. The error indicates the process to create the synthetic full failed because it could not find a valid base full backup to build upon. The other issues would cause different, more general connection or authentication failures.

The Protection Engine in PowerProtect Data Manager is responsible for the data movement and transformation work (deduplication, compression, encryption) during backup and restore operations. Its sizing is directly tied to performance requirements, specifically the aggregate throughput needed to meet backup windows and recovery time objectives (RTOs). Sizing based on storage capacity, network ports, or software versions does not address the core performance workload the Protection Engine must handle.

When a Data Domain system’s file system becomes completely full, it enters a protective read-only state to prevent data corruption. This is a common cause of the issue described. The first step in troubleshooting should be to check the system’s capacity using commands like `df` or the GUI dashboard to confirm if physical storage is exhausted. The other options might cause other problems but are not the typical direct cause of a system-wide read-only state.

This is the fundamental principle of Avamar’s source-side, global deduplication. It deduplicates data across all clients within the entire Avamar system. After the first instance of a unique data segment (like that 1 MB file) is backed up, subsequent backups from any client that contain the same segment only store a reference pointer. This results in massive storage savings, which is a key selling point of the Avamar platform.

In PowerProtect Data Manager, a ‘Protection Storage’ entity is a crucial configuration object. It represents the actual backup target or repository where the backup copies will be stored. This is typically a Dell EMC Data Domain system or a PowerProtect appliance. You add this storage system to PowerProtect Data Manager so it can manage and orchestrate backups to that destination. It is not the manager itself, the agents, or a network definition.

Creating multiple parallel backup jobs grouped by application or change rate is a best practice. It balances load across the PowerProtect Data Manager deployment, improves efficiency by backing up VMs with similar characteristics together, and provides resilience (a failure in one job doesn’t impact all backups). A single large job creates a bottleneck and risk. Forever-incremental can lead to long restores and isn’t always suitable. Increasing retention doesn’t address performance.0