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| Section | Objectives |
|---|---|
| Topic 1: Monitoring, Testing and Troubleshooting | - Resolving third-party backup integration problems - Documenting runbooks for incident response - Non-disruptive recovery testing - Diagnosing network, storage and replication failures - Troubleshooting permission issues and misconfigured DR environments - Setting up alerts for replication lag |
| Topic 2: Data Protection and Snapshots | - Data restoration at VM and application level - Snapshot retention policies design - Storage configuration for BCDR - Incremental backup implementation - Snapshot scheduling and management |
| Topic 3: Nutanix Disaster Recovery Solutions | - Failover procedures and execution - Metro Availability configuration and management - Configuring and managing replication policies - Integration with third-party backup solutions - Recovery workflows using Nutanix native tools |
| Topic 4: Replication and Failover Architecture | - Network segmentation for BCDR environments - Synchronous replication across sites - Recovery site capacity management - Asynchronous replication planning - Failover readiness validation |
| Topic 5: Security and Hardening | - Designing secure BCDR environments - Approval policies configuration - Security best practices for replication - RBAC implementation for disaster recovery |
| Topic 6: BCDR Fundamentals and Requirements Interpretation | - Defining recovery strategies aligned to business requirements and risk tolerance - Understanding RTO and RPO concepts and business impact analysis - Translating business requirements into resilient recovery architectures - Selecting appropriate replication types (async, near-sync, synchronous, metro) - Availability metrics and SLA definitions |
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問題 #81
An administrator is tasked with verifying the cluster ' s disaster recovery capability. The administrator needs to validate the capability without impacting the production VMs on the Source cluster and ensure that the destination cluster can bring up all the protected VMs. How can the administrator perform a failover?
答案：A
解題說明：
Testing is the most vital component of a resilient BCDR strategy, as it proves that recovery objectives (RTO
/RPO) are achievable before a real emergency occurs. The Nutanix " Test Failover " feature is purpose-built for this requirement. Unlike a Planned Failover (which shuts down production) or an Unplanned Failover (which assumes production is dead), a Test Failover performs a non-disruptive validation.
During a Test Failover, the orchestration engine uses the most recent snapshots to power on VMs at the destination cluster. To satisfy the " without impacting production " requirement, the test VMs are typically attached to an " Isolated " or " Test " network segment that has no route to the live production network. This prevents IP address conflicts and service interference while allowing the administrator to log into the recovered VMs and verify that applications start correctly. Simple " Validation " (Option A) only checks the configuration settings and connectivity but does not actually test the power-on sequence or application logic.
By executing a full Test Failover, the organization gains documented proof of its DR readiness, identifying potential issues like missing dependencies or incorrect boot orders without causing any disruption to the users currently accessing the primary site.
問題 #82
An administrator intends to configure a NearSync replication schedule with a 15-minute Recovery Point Objective (RPO) on a hybrid 3-node cluster. The current nodes in the cluster are configured with one SSD and four HDDs each. Which cost-effective modification is required to support this specific replication schedule?
答案：D
解題說明：
Nutanix NearSync replication provides low RPOs (1 to 15 minutes) by using " Lightweight Snapshots " (LWS). NearSync has higher performance and hardware requirements than standard Asynchronous replication because it must handle metadata operations and data transfers much more frequently.
For a cluster to support NearSync, it must have sufficient high-performance storage to handle the additional I
/O load associated with LWS. On hybrid nodes (those with both SSDs and HDDs), Nutanix has a specific hardware requirement: each node must have at least two SSDs. This is because the NearSync LWS metadata and incoming replicated data are initially written to the SSD tier to ensure low latency and high throughput. A single SSD per node is typically insufficient to handle both active VM production I/O and the high-frequency NearSync overhead without performance degradation. Therefore, adding a second SSD to each node (Option D) is the mandatory modification. While upgrading to NVMe (Option A) or adding more nodes (Option B) would also improve performance, adding a second SSD is the minimum " cost-effective " requirement specified by Nutanix engineering for NearSync support on hybrid clusters. Meeting these hardware prerequisites is essential to ensure that the cluster can maintain the 15-minute RPO without transitioning back to an hourly schedule due to resource constraints.
問題 #83
What must an administrator verify before starting a migration of entities from a protection domain to a protection policy?
答案：A
解題說明：
Migrating from legacy Protection Domain (PD) based management to the modern Prism Central (PC) based Protection Policies is a recommended best practice for scaling Nutanix Disaster Recovery. This migration involves moving VMs from a " Prism Element " centric management model to a centralized, category-based model in Prism Central.
To ensure that no data is lost during this transition, the most critical prerequisite is to verify that a successful, full replication (backup) of the Protection Domain has recently completed. This ensures that the recovery site already possesses a complete and consistent set of data for the VMs before they are unlinked from the old policy and attached to the new one. While adding VMs to a category (Option A) is a step in the process, it is not the first verification step required for data safety. If an administrator attempts to migrate while a replication is incomplete or failing, the transition to the new policy might leave the VMs unprotected for an extended period, or recovery points might be missing if a disaster occurs mid-migration. By completing a full backup of the PD first, the administrator creates a " safety net " of recovery points that can be used if the migration itself encounters issues. This ensures that the transition to modern DR is performed with minimal risk to the business ' s data protection objectives.
問題 #84
An administrator is migrating from a Protection Domain-based deployment to a Prism Central (PC)-based deployment. What occurs if a snapshot is deleted before the protection policy is applied to the migrated entities?
答案：C
解題說明：
Migrating from legacy Protection Domains to modern Prism Central Protection Policies involves transitioning the management of virtual machine snapshots. During this process, the historical snapshots created by the Protection Domain are often intended to be " claimed " or utilized by the new PC-based system as valid recovery points.
Snapshots are point-in-time references to data on the storage tier. If a snapshot is deleted from the cluster before the migration to Protection Policies is finalized, the underlying data blocks associated with that specific point in time may be reclaimed by the system ' s garbage collection process. Consequently, the recovery points that were associated with that deleted snapshot will no longer be available for use within the new deployment. The system cannot " automatically recreate " (Option A) a deleted snapshot because the exact historical state of the data is lost once the snapshot is purged. The migration itself typically continues for the remaining valid data, but the loss of historical recovery points could impact the business ' s ability to restore to specific past dates. This highlights the importance of data retention awareness during management-plane migrations.
問題 #85
An administrator recently expanded a Nutanix cluster by adding several new nodes. Shortly after, multiple backup jobs began failing. The following error is consistently reported: " Failed to perform backup: Cannot complete process ' iscsiadm --mode discovery --type sendtargets --portal X.X.X.X ' within timeout " . What is the most likely cause of the failure?
答案：D
解題說明：
Nutanix storage is often accessed by external backup solutions (like Veeam, Commvault, or HYCU) using the iSCSI protocol. This allows the backup server to mount snapshots and read data directly from the storage tier.
The error message " iscsiadm... discovery... timeout " specifically indicates that the backup server ' s iSCSI initiator is unable to communicate with the Nutanix Data Services IP or the Controller VMs (CVMs) over the network.
When a Nutanix cluster is expanded, it is essential that all networking and firewall configurations applied to the existing nodes are also applied to the new nodes. The iSCSI protocol relies on specific TCP ports: port
3260 is the standard port for iSCSI traffic, and port 3205 is often used for iSCSI discovery and metadata operations within Nutanix. If these ports are not open in the physical firewall or the host-based security rules for the newly added nodes, the backup server will be unable to discover the targets on those specific nodes, leading to the timeout errors . This highlights a common " Day 2 " operational trap: cluster expansion requires careful auditing of network security groups and firewall whitelists to ensure that external integrations- especially BCDR and backup services-continue to have uninterrupted access to the expanded storage fabric.
Verifying and opening ports 3205 and 3260 for the new node IPs is the first step to resolving this timeout issue.
問題 #86
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