VMCE Repository and Storage Management 4 — Questions and Answers
Question 1: Which Veeam component is responsible for converting a backup file stored in a repository into a live VM for Instant Recovery?
- Backup Proxy
- vPower NFS Server (Correct answer)
- Mount Server
- Backup Repository Data Mover
Correct answer: vPower NFS Server
The vPower NFS Server publishes a virtual NFS datastore backed by the backup file, enabling a hypervisor to boot a VM directly from the repository without restoring to production storage.
Question 2: When configuring a Veeam repository on a Windows server with an ReFS volume, which capability does Veeam leverage to speed up synthetic full backup creation?
- VSS hardware snapshots via ReFS block cloning
- ReFS block cloning to copy data blocks without reading and rewriting them (Correct answer)
- ReFS journaling to track changed blocks and skip unchanged data
- ReFS compression to reduce the size of full backup files before writing
Correct answer: ReFS block cloning to copy data blocks without reading and rewriting them
Veeam uses the ReFS block cloning (copy-on-write) capability to create synthetic full backups by referencing existing data blocks rather than physically copying bytes, dramatically reducing I/O.
Question 3: A VMCE candidate needs to store backups on a repository that cannot accept new data but must still allow restore operations. Which Veeam repository setting achieves this?
- Set the repository to maintenance mode
- Enable immutability on the repository
- Set the repository to read-only mode (Correct answer)
- Disable the concurrent task limit to zero
Correct answer: Set the repository to read-only mode
Setting a repository to read-only mode prevents any new backup data from being written while still allowing all restore and export operations to proceed.
Question 4: What is the purpose of the 'Limit read and write data rates' option available on Veeam backup repositories?
- It caps the number of VMs that can be backed up to the repository simultaneously
- It throttles the throughput of data transfer to and from the repository to reduce storage I/O impact (Correct answer)
- It restricts backup jobs to run only during defined maintenance windows
- It limits the compression ratio applied to backup data to reduce CPU load on the repository server
Correct answer: It throttles the throughput of data transfer to and from the repository to reduce storage I/O impact
This I/O throttling option caps the megabytes per second that Veeam uses when reading from or writing to the repository, protecting other workloads sharing the same storage.
Question 5: Which Veeam backup file format stores all VM data and metadata for an entire backup job in a single VBK file?
- Per-VM backup chains with separate metadata files
- Per-job backup files (legacy format) (Correct answer)
- Per-VM backup chains without separate metadata files
- Object storage flat files
Correct answer: Per-job backup files (legacy format)
The per-job (legacy) format combines all VMs within a job into a single VBK full and associated VIB/VRB incremental files, contrasting with per-VM formats that separate each machine.
Question 6: In Veeam Backup & Replication, what is the function of the 'Align backup file data blocks' repository setting?
- It aligns VM disk data to 4 KB boundaries to optimize reads on deduplication appliances (Correct answer)
- It forces all backup files to use 512-byte sector alignment for compatibility with legacy storage
- It groups multiple small incremental files into a single aligned block for network transfer efficiency
- It synchronizes backup file creation times across all extents in a Scale-out Backup Repository
Correct answer: It aligns VM disk data to 4 KB boundaries to optimize reads on deduplication appliances
Enabling data block alignment ensures that backup data is written on 4 KB-aligned boundaries, which improves deduplication ratio and I/O performance on storage appliances sensitive to alignment.
Question 7: What is the minimum Linux kernel version required to enable immutability on a Veeam hardened repository?
- Kernel 3.10 (RHEL/CentOS 7 default)
- Kernel 4.9 (Debian 9 default) (Correct answer)
- Kernel 4.5 or later to support the chattr +i flag on ext4
- Kernel 5.4 or later to support the required immutable file attribute with file locking
Correct answer: Kernel 4.9 (Debian 9 default)
Veeam's hardened repository immutability relies on the chattr immutable flag, which requires a kernel version of 4.9 or newer; Debian 9 / Ubuntu 18.04 LTS kernels meet this requirement.
VMCE Repository and Storage Management 4
Which Veeam component is responsible for converting a backup file stored in a repository into a live VM for Instant Recovery?