Veeam Backup & Replication Architecture Flashcards

In Veeam's architecture, what is the purpose of a WAN Accelerator?

Answer: To deduplicate and compress backup traffic between sites, reducing bandwidth consumption

WAN Accelerators use global deduplication and caching to reduce the volume of data transferred between sites, making offsite backups and replications much faster.

Which Veeam transport mode is most efficient for SAN environments where the backup proxy has direct access to the same storage as the production VMs?

Answer: Direct SAN Access mode

Direct SAN Access mode allows the proxy to read VM disk data directly from the SAN LUN, bypassing ESXi hosts and the production network for maximum throughput.

What is Veeam's 'Synthetic Full Backup' and how does it differ from an Active Full?

Answer: A synthetic full is constructed on the backup server by merging existing incremental files without re-reading source VM data; an active full re-reads the entire VM from source

Synthetic full backup consolidates existing backup data on the repository side without accessing source infrastructure, while an active full reads the entire VM disk from the source.

Where does Veeam create a VM snapshot during a backup job using VMware vSphere?

Answer: On the ESXi host using vSphere VADP API to quiesce and freeze the VM disk I/O

Veeam triggers a VMware snapshot via VADP on the ESXi host to capture a consistent point-in-time state of the VM disks before reading data.

In a Veeam deployment, what is the 'Backup Proxy' responsible for?

Answer: Processing backup traffic by reading VM data, compressing, deduplicating, and encrypting it before sending to the repository

The Backup Proxy is the data mover that handles all data processing tasks including reading VM data from source, applying compression/deduplication/encryption, and transmitting to the repository.

What is the maximum number of concurrent tasks a single Veeam Backup Proxy can handle by default, and what controls this setting?

Answer: The concurrent task limit is configurable per proxy (default 2), controlled in the Backup Proxy properties in the Veeam console

Each backup proxy has a configurable concurrent task limit (defaulting to 2) set in its properties, allowing administrators to tune performance based on available proxy resources.

Which Veeam architecture component is specifically required for Veeam's 'Backup from Storage Snapshots' feature with EMC/Dell or NetApp storage?

Answer: A Storage Integration Plugin (storage-specific) plus a Backup Proxy with access to the storage system

Backup from Storage Snapshots requires the appropriate storage vendor integration plugin and a backup proxy that can access the storage system to mount and read snapshot data.