VEEAM VMCA2022 Exam Dumps

The repository type that will be most impacted by using Veeam's native encryption is dedupe repositories. Dedupe repositories are backup repositories that use deduplication appliances or software to reduce backup size and optimize storage utilization. However, if you use Veeam's native encryption for backup jobs that target dedupe repositories, you will lose most of the deduplication benefits, as encrypted data blocks cannot be deduplicated effectively. Therefore, it is recommended to use either the encryption feature of the deduplication device or software, or avoid encryption altogether for dedupe repositories.

Snapshot stun is a phenomenon that occurs when a VMware snapshot is removed and the virtual machine (VM) experiences a temporary freeze or performance degradation1. This can affect the availability and consistency of mission critical applications running on the VM.

To avoid snapshot stun, Veeam Backup & Replication offers several options for backing up Linux VMs, such as backup from storage snapshots, direct SAN access, or hot-add2. However, based on the business requirements, the best option is to run pre-freeze and post-thaw scripts before backing up the workload.

Pre-freeze and post-thaw scripts are custom scripts that you can configure to run on the Linux VM before and after the snapshot is taken. The pre-freeze script can be used to quiesce the application and flush its data to disk, ensuring a consistent backup.The post-thaw script can be used to resume the application and perform any necessary cleanup actions3.

By using pre-freeze and post-thaw scripts, you can achieve application consistency and minimize the impact of snapshot stun on the Linux VM.You can use the Veeam Backup & Replication user interface or the Veeam PowerShell snap-in to configure the scripts for the backup job3.

You can find more information about pre-freeze and post-thaw scripts and how to use them in the following resources:

Pre-Freeze and Post-Thaw Scripts

Best Practice for Backing Up Linux VMs

Snapshot Stun Issue

Immutable repositories are backup storage locations that prevent unauthorized modifications or deletions of backup data, ensuring its integrity and recoverability.Immutable repositories are essential for protecting backups against ransomware attacks, accidental deletions, or malicious insiders1.

Veeam Backup & Replication supports several types of immutable repositories, such as hardened repositories, immutable object storage repositories, and immutable deduplicating storage appliances2. Among these options, the best configuration for ensuring SLA compliance and providing protection against ransomware is to leverage hardened repositories at both primary and secondary sites, and offload to object storage in a public cloud with immutability enabled.

Hardened repositories are Linux-based repositories that use XFS file system with immutability flag to protect backup files from changes or removals.Hardened repositories can be used as primary or secondary backup targets, and can be combined with Veeam Scale-out Backup Repository to simplify backup management and optimize storage utilization3.

Object storage repositories are cloud-based repositories that use object storage services, such as Amazon S3, Microsoft Azure Blob Storage, or Google Cloud Storage, to store backup data. Object storage repositories can be used as secondary backup targets, and can leverage the immutability feature of the cloud provider to prevent backup data from being overwritten or deleted.

By using hardened repositories at both primary and secondary sites, you can achieve high availability and redundancy for your backup data, as well as fast and reliable restores. By offloading to object storage in a public cloud with immutability enabled, you can achieve long-term retention and compliance, as well as cost savings and scalability. This configuration also follows the 3-2-1-1 backup rule, which recommends having three copies of data, on two different types of media, with one copy off-site and one copy immutable.

You can find more information about immutable repositories and how to configure them in the following resources:

Immutable Backup Solutions: Linux Hardened Repository

Unstructured Data Backups in Immutable Repositories

Hardened Repository

[Immutability for Object Storage Repositories]

[3-2-1-1 Backup Rule]

The recommended method to replicate VMware virtual machines with a less than five-minute RPO is Veeam Continuous Data Protection (CDP). CDP is a feature that allows near-continuous replication of VMware virtual machines to a secondary site or cluster with minimal data loss and downtime. CDP uses VMware vSphere APIs for I/O Filtering (VAIO) to capture every write operation from the source VMs and send them to the target VMs in near real-time. CDP can achieve RPOs as low as seconds and enable fast failover and failback in case of a disaster.