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| Section | Objectives |
|---|---|
| Topic 1: Data Protection and Backup Integration | - Snapshot Management - Backup Solutions Integration |
| Topic 2: Nutanix Disaster Recovery Architecture | - Nutanix Leap Overview - Replication Types (Sync/Async) - Protection Domains |
| Topic 3: Disaster Recovery Fundamentals | - Business Continuity Principles - DR Concepts (RPO, RTO, SLAs) |
| Topic 4: Recovery Operations | - Recovery Plans and Orchestration - Failover and Failback Procedures - Test Recovery Workflows |
| Topic 5: Prism Central Management | - DR Monitoring and Operations - Cluster and Site Management |
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95. Frage
A financial institution is designing a disaster recovery solution for a business-critical application that requires a zero recovery point objective (RPO). The infrastructure team decides to implement Nutanix Metro Availability between two physical data centers (DC-Alpha and DC-Beta) interconnected by a dedicated dark fiber. What is the maximum possible network latency on this link for this configuration to function correctly?
Antwort: C
Begründung:
Nutanix Metro Availability is a continuous availability solution designed to survive a site failure with zero data loss (Zero RPO). Because it operates on a synchronous replication model, every write performed by a virtual machine must be acknowledged by both the local and the remote clusters before the write is confirmed to the application. This process introduces a " latency penalty " equal to the network Round Trip Time (RTT) between the sites.
To maintain acceptable application performance and ensure cluster stability, Nutanix enforces a strict latency limit of 5 ms RTT between the primary and secondary clusters. If the latency exceeds this 5 ms threshold, the time spent waiting for remote acknowledgments would cause severe performance degradation for high-I/O workloads, such as the SQL or Oracle databases common in financial institutions. Furthermore, high latency increases the risk of the synchronous link being " broken " during periods of high data churn. While the Witness VM (used for tie-breaking) can tolerate much higher latency (up to 200 ms), the data-path link must remain under 5 ms to satisfy the technical requirements of the Metro Availability feature and the performance expectations of Tier-1 business-critical applications.
96. Frage
An administrator finds replications for Marketing VMs are failing to replicate. After doing some digging the administrator was able to find the following:
* Connectivity was confirmed on ports 2020 and 2009 between the clusters
* All other VMs are replicating successfully
* Cluster wide storage has plenty of remaining space
* No firewall exists between the sites
* Marketing VMs are running Windows, successful VMs are running Linux
What could be causing the Marketing VMs to fail replications?
Antwort: A
Begründung:
In a complex BCDR environment, replication failures that affect only a specific subset of virtual machines- while others on the same cluster succeed-usually point to a configuration mismatch rather than a general network or storage issue. Since the ports (2009 and 2020) are confirmed open and storage is available, the transport layer is functional. The fact that Linux VMs are succeeding while Windows (Marketing) VMs are failing suggests that the two groups may be mapped to different destination storage containers. In Nutanix replication, if a container mapping is explicitly set for one set of entities (the Linux VMs) but not for another (the Marketing VMs), the second group might be defaulting to a destination container that is either missing, misconfigured, or has restricted permissions. This specific scenario implies that the successful Linux VMs are benefiting from a correctly configured container mapping on the remote site, whereas the Marketing VMs are likely attempting to replicate to a location where mapping is invalid or non-existent. Troubleshooting this requires an administrator to verify the Prism Central container mapping settings to ensure that the storage targets for all protected categories are reachable and correctly associated with the destination storage pool.
97. Frage
Which log file should an administrator review to ensure consistent connectivity stability between primary and remote disaster recovery sites?
Antwort: D
98. Frage
An administrator plans to migrate guest VMs from a legacy Protection Domain-based DR plan to the Prism Central-based Disaster Recovery solution. What should be done first before removing the legacy protection domains?
Antwort: D
Begründung:
Modern Nutanix Disaster Recovery utilizes Prism Central-based Protection Policies and Recovery Plans, which offer more advanced orchestration and automation than legacy Prism Element-based Protection Domains. When an organization decides to upgrade its DR management, a careful migration path must be followed to ensure that VMs do not lose protection during the transition.
The first and most critical step is to migrate the virtual machines from the legacy Protection Domain to a new PC-based Protection Policy. This process involves adding the VMs to the correct Categories in Prism Central, which then associates them with the new policy. Once the VMs are " claimed " by the Protection Policy, the system will begin managing their snapshots and replication schedules according to the new logic. Only after the VMs are successfully protected under the new system is it safe to " unprotect " them and remove the legacy Protection Domains (and their associated snapshots) to reclaim storage. Attempting to delete snapshots first (Option A) or perform a failover (Option D) before the management handoff is complete could leave the business without a valid recovery point if an outage occurs during the migration window.
99. Frage
A Protection Domain exists with a VM, but no new snapshots are being created and replication never starts.
Which is the most likely DR setup issue?
Antwort: D
Begründung:
In a Nutanix legacy Protection Domain (PD) configuration, three primary elements must be in place for data protection to occur: the entities (VMs), the remote site (destination), and the schedule. Even if a VM has been added to a Protection Domain (negating Option A), the cluster will not take any action unless it is explicitly told " when " and " how often " to do so.
If no new snapshots are being created locally and replication is not starting, the most likely issue is that no " Schedule " has been configured for that Protection Domain. The schedule defines the RPO (e.g., hourly, daily) and the retention period for the snapshots. Without an active schedule, the Cerebro service simply has no instruction to initiate the snapshot process. While a missing vStore mapping (Option C) would cause the " replication " to fail, the " local snapshots " would still be created in the PD. Similarly, low bandwidth throttling (Option D) would cause the replication to move slowly or time out, but it would not prevent the initial creation of the local recovery points. Therefore, verifying the presence of a valid, active replication schedule is the mandatory first step for an administrator when a Protection Domain appears to be " idle " despite having VMs assigned to it.
100. Frage
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