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| Section | Objectives |
|---|---|
| Topic 1: Information Lifecycle Management | - Policy and data placement
|
| Topic 2: Monitoring and Troubleshooting | - Operational monitoring
|
| Topic 3: Storage Management | - Tenant and bucket administration
|
| Topic 4: StorageGRID Architecture and Components | - Core StorageGRID system components
|
| Topic 5: Grid Installation and Configuration | - Deployment processes
|
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NEW QUESTION # 50
Your team is troubleshooting intermittent connectivity issues during peak hours. You suspect that one or more StorageGRID nodes might be experiencing performance issues or downtime, and you want the load balancer to automatically skip these nodes.
Which feature in the third-party load balancer is designed to detect unresponsive nodes and prevent them from receiving client requests?
Answer: C
Explanation:
The correct feature is health checks. When a third-party load balancer is placed in front of StorageGRID nodes, it must continuously determine which backend nodes are healthy enough to accept S3 client traffic.
NetApp specifically recommends configuring a health-check mechanism so the load balancer can test each node and remove an unhealthy or unresponsive node from the active pool.
For StorageGRID, NetApp recommends using an HTTP OPTIONS request as a health probe. The load balancer sends the request directly to each Storage Node and expects an HTTP 200 response. If a node repeatedly fails to return the expected response, the third-party load balancer marks that node offline and stops directing new client connections to it. NetApp's guidance gives an example polling interval of once per second and marking a node offline after three failed checks.
Option A, GSLB, distributes traffic between geographically separate sites or data centers rather than determining the health of an individual backend node. Option C, SSL offloading, handles TLS processing.
Option D, session persistence, keeps a client's requests associated with a selected backend and does not detect failed nodes.
Therefore, B. health checks directly satisfies the requirement.
Reference topics: Third-Party Load Balancers # Backend Node Health Checks # HTTP OPTIONS Probe # Node Pool Availability # S3 Client Connectivity
NEW QUESTION # 51
Your customer wants to maintain high availability during maintenance activities such as upgrades, hotfixes, and firmware updates.
Which best practice should the customer follow to ensure minimal disruption?
Answer: C
Explanation:
StorageGRID maintenance should be performed using a rolling, node-by-node approach so that the grid continues providing S3 services while individual nodes are temporarily unavailable. NetApp states that StorageGRID upgrades are designed to be non-disruptive: nodes of the same type are taken down and upgraded one at a time, preventing all nodes of a particular role from becoming unavailable simultaneously.
NetApp also permits administrators to approve individual nodes or groups of nodes and, when upgrade order is important, explicitly recommends waiting for one node or group to complete before approving the next.
During this process, administrators should monitor Grid Manager for node status, alerts, and service health.
High availability also depends on appropriate architecture: ILM policies should maintain redundant object copies, and S3 clients should connect through HA-group VIPs, highly available third-party load balancers, or multiple Gateway Nodes.
Option A increases operational risk by scheduling maintenance during peak load. Option C could remove too much grid capacity simultaneously and defeat redundancy. Option D is not a prescribed StorageGRID maintenance procedure and could unnecessarily disrupt grid and client communication.
Reference topics: Software Update # Rolling Upgrade # Hotfix Installation # Node Availability # HA Client Connectivity # ILM Redundancy
NEW QUESTION # 52
A StorageGRID ILM policy has moved objects belonging to a specific bucket to a Cloud Storage Pool. The objects have transitioned automatically to S3 Glacier Deep Archive storage class to minimize costs. A user now requires immediate access to one of these archived objects.
How can the user achieve this goal?
Answer: C
Explanation:
When an object stored in a Cloud Storage Pool has transitioned to Amazon S3 Glacier Deep Archive, it is in a non-retrievable state. StorageGRID therefore cannot satisfy a normal GetObject request until a retrievable copy has first been restored. NetApp specifies that the client application must issue an S3 RestoreObject request to restore the object temporarily within the Cloud Storage Pool. After the restoration completes, the client can issue GetObject through StorageGRID to retrieve the data.
For a restored object, RestoreObject specifies how long the retrievable copy remains available. StorageGRID supports restoration from Glacier Deep Archive, but Deep Archive does not support the Expedited retrieval tier; only Standard or Bulk retrieval can be used. Thus, "immediate" access means initiating the restore process immediately, not instantaneous retrieval from the Deep Archive tier.
Option A is incorrect because GetObject does not automatically restore a non-retrievable Glacier object.
Option B is incorrect because restoration is performed through StorageGRID's S3 API; direct Amazon- console intervention is unnecessary. Option C is incorrect because StorageGRID explicitly supports RestoreObject for Cloud Storage Pool objects transitioned to Glacier Deep Archive.
Reference topics: ILM # Cloud Storage Pools # S3 Glacier Deep Archive # RestoreObject # GetObject # Retrieval Tiers
NEW QUESTION # 53
A customer wants to test their application against a StorageGRID system to verify its compatibility.
What is the minimum number and type of nodes required to deploy a healthy virtual StorageGRID environment for this test?
Answer: D
Explanation:
A healthy StorageGRID deployment requires one primary Admin Node and at least three Storage Nodes at each site. NetApp StorageGRID 12.0 documentation states that every grid requires a primary Admin Node to provide core management and configuration services, while every site requires a minimum of three Storage Nodes. Therefore, the smallest healthy single-site virtual test environment contains four nodes: one Admin Node plus three Storage Nodes.
The three-Storage-Node minimum is important because Storage Nodes host core distributed services such as Cassandra, DDS, and ADC. In particular, the ADC service is hosted on at least three Storage Nodes at a site, supporting grid topology information, authentication, and service discovery.
Option A lacks the required primary Admin Node and therefore cannot constitute a complete manageable StorageGRID grid. Option D contains an Admin Node but only one Storage Node, which does not satisfy the three-node minimum. Option C would work, but the Gateway Node is optional because Admin Nodes can also provide S3 load-balancing functionality for a small compatibility-test deployment.
Therefore, B is the minimum healthy virtual configuration.
Reference topics: StorageGRID Architecture # Grid Node Types # Primary Admin Node # Minimum Storage Nodes per Site # Virtual Deployment Requirements
NEW QUESTION # 54
Your customer has a two-site StorageGRID system, with three Storage Nodes on each site. The customer wants to always read the last written version of an object. They have set up the information lifecycle management (ILM) policy to write a single copy to each site. They have set the ingest policy to Strict and the consistency profile to strong-global. During maintenance on a node on Site-2, an additional node on that site fails, and end users complain about being unable to upload objects to the grid.
What is the cause of these errors?
Answer: B
Explanation:
The failure is caused by the strong-global metadata consistency requirement, not by the Strict ILM placement requirement. StorageGRID stores object metadata in Cassandra, normally maintaining three metadata replicas per site. With three Storage Nodes at Site-2, taking one node down for maintenance and then losing another leaves only one metadata replica available at that site. The required metadata quorum can no longer be achieved for strong-global operations. NetApp documents that strong-global guarantees read-after-write consistency across all sites and requires sufficient metadata replicas to complete the operation.
The distinction from Strict ingest is important. Strict controls object-data placement: all copies specified by the ILM rule must be created before StorageGRID returns success. Here, the ILM rule requires only one copy at each site. Because one Storage Node remains operational at Site-2, StorageGRID can potentially place the Site-2 object copy there. Therefore, the data-placement requirement itself is not necessarily violated.
However, with two of the three metadata-bearing Storage Nodes unavailable at Site-2, Cassandra cannot satisfy the strong-global metadata consistency requirement, causing client PUT operations to fail.
Reference topics: S3 Consistency # Strong-global # Cassandra Metadata Replicas # Metadata Quorum # Strict ILM Ingest Behavior
NEW QUESTION # 55
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