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| Section | Objectives |
|---|---|
| Topic 1: Prism Central Management | - DR Monitoring and Operations - Cluster and Site Management |
| Topic 2: Data Protection and Backup Integration | - Backup Solutions Integration - Snapshot Management |
| Topic 3: Disaster Recovery Fundamentals | - Business Continuity Principles - DR Concepts (RPO, RTO, SLAs) |
| Topic 4: Recovery Operations | - Failover and Failback Procedures - Test Recovery Workflows - Recovery Plans and Orchestration |
| Topic 5: Nutanix Disaster Recovery Architecture | - Nutanix Leap Overview - Protection Domains - Replication Types (Sync/Async) |
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問題 #27
An administrator notices that VM replication from ClusterA to ClusterB fails consistently at the same point during the replication job. The following observations are noted by the administrator:
* The Prism dashboard shows the replication job failing during snapshot creation.
* ClusterB storage pool and container usage is under 80%, well below capacity.
* Network latency/Pings between ClusterA and ClusterB averages 3ms, with occasional spikes to 25ms.
* VM event logs indicate frequent I/O timeout errors during the replication window.
* Both clusters are running compatible AOS versions.
What is the most likely cause for the failing replications?
答案：B
解題說明：
Troubleshooting replication failures requires analyzing the relationship between snapshot creation and data transfer. In this scenario, the failure occurs during the snapshot creation phase rather than during the transfer of data across the wire. While network spikes and I/O timeouts are noted (Option D), these are often symptoms rather than the root cause when the specific failure point is the snapshot itself .
If multiple replication jobs or protection policies are scheduled to run at the exact same time, the cluster may experience " snapshot contention " or metadata locks. When schedules overlap significantly, the overhead on the Controller VMs (CVMs) can lead to the observed I/O timeout errors in the guest OS as the system struggles to quiesce applications and freeze the filesystem multiple times in quick succession. This is particularly common in environments with high data change rates where the previous replication cycle has not finished before the next one begins. Since storage is sufficient (Option B) and the clusters are compatible (Option E), the most logical cause is schedule misconfiguration. To resolve this, the administrator should stagger the start times of protection policies or combine multiple VMs into a single, unified policy to ensure that the Nutanix snapshot engine can process the requests sequentially without causing the resource exhaustion that leads to job failure.
問題 #28
An administrator has been tasked with configuring a Nutanix replication solution that provides an RPO of zero. Which solution should the administrator choose?
答案：A
解題說明：
The Recovery Point Objective (RPO) is a measure of how much data an organization can afford to lose during an outage. An RPO of zero means that absolutely no data loss is tolerated; every write performed at the primary site must be safely committed to the recovery site before the application receives a confirmation. In the Nutanix portfolio, Synchronous Replication (Option A) is the only technology that guarantees this level of data protection. It mirrors every write in real-time between two clusters, ensuring they are always in perfect synchronization. In contrast, Nearsync Replication (Option B) allows for very low RPOs (as low as 20 seconds to 1 minute), but it is still fundamentally an asynchronous process using lightweight snapshots, meaning some " data-in-flight " could be lost. Async Replication (Option C) typically involves RPOs of one hour or more and is used for less critical workloads. Cloud Connect (Option D) is a legacy feature for off-site backup and does not support zero-RPO requirements. Synchronous Replication is the " gold standard " for Tier-1, mission-critical applications where data integrity and zero loss are the primary business requirements, provided the network latency between sites is 5ms or less.
問題 #29
Which statement describes the most efficient and least disruptive method to achieve a file-level recovery without rolling back the entire VM?
答案：A
解題說明：
Nutanix offers several data recovery methods, but the objective of " least disruptive " and " most efficient " is specifically addressed by the Self-Service Restore (SSR) feature. SSR is powered by Nutanix Guest Tools (NGT), which must be installed on the virtual machine. This functionality allows a user or an administrator to mount a disk from a historical recovery point directly to the active, running virtual machine as a temporary drive.
Once the snapshot is mounted, the guest operating system treats it as a standard local disk, allowing the user to browse the folder structure and perform a surgical restore of only the specific files that were deleted or corrupted. This process avoids the significant overhead and downtime associated with rolling back the entire VM (Option B) or cloning the VM to a new entity (Option C), which would consume additional compute and storage resources. Option A refers to Nutanix Files (NAS) functionality, which is separate from the block- level VM snapshot recovery discussed here. By using SSR/NGT, the production environment remains online and undisturbed, and the recovery process is delegated to the level of individual files, providing the highest level of granularity and efficiency in typical day-to-day data loss scenarios.
問題 #30
Which log file should an administrator review to ensure consistent connectivity stability between primary and remote disaster recovery sites?
答案：B
問題 #31
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?
答案：C
解題說明：
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.
問題 #32
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