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NEW QUESTION # 75
What is the recommended Maximum Transmission Unit (MTU) size for the replication ports on a FlashArray?
Answer: C
Explanation:
Pure Storage strongly recommends an MTU size of 9000 (Jumbo Frames) for replication networks-such as those used for Asynchronous Replication, ActiveCluster, and ActiveDR-as well as for iSCSI and NVMe/TCP data networks.
A 9000-byte MTU significantly reduces protocol overhead and CPU processing load on the storage controllers by allowing a much larger payload of data to be transmitted inside a single network packet. During heavy replication, this drastically increases throughput and maximizes bandwidth efficiency.
Here is why the other options are incorrect:
1500 (B): While 1500 bytes is the standard default MTU for Ethernet and is exactly what Pure Storage recommends for the management ports (vir0), it is not the recommended optimization for high-throughput replication traffic. (Note: If your network cannot support 9000 end-to-end, 1500 must be used to prevent packet fragmentation, but 9000 remains the best-practice recommendation).
4200 (A): This is an arbitrary number and is not a standard network MTU size used in Pure Storage environments.
NEW QUESTION # 76
In Pure Protect //DRaaS, the administrator modified the business policy used for backups, reducing the "DR Retention" from 7 days to 3 days. The DR target environment currently has 7 days of backups.
What will occur?
Answer: B
Explanation:
Policy-Driven Automation: Pure Protect //DRaaS (Disaster Recovery as a Service) is built on a declarative policy engine. When you define a business policy (Protection Group or similar policy-based management), the system's primary goal is to bring the environment into compliance with the "Desired State" defined by that policy.
Retention Enforcement: When the retention period is reduced (e.g., from 7 days down to 3 days), the Purity/Pure Protect engine identifies that any existing snapshots or backups older than the new 3-day threshold are now "out of policy." Immediate Reclamation: Unlike some legacy backup systems that only apply new retention settings to future backups, Pure Storage's policy-driven architecture typically triggers an immediate cleanup of the now-obsolete data to reclaim space on the target. This ensures the environment matches the modified policy requirements immediately upon the policy update.
SafeMode Considerations: If SafeMode is enabled on the target, these "erased" backups will actually move into the "Destroyed" (but not yet eradicated) bucket for the duration of the SafeMode timer, providing a safety net against accidental policy changes or malicious deletions. However, from the perspective of the active DR policy, they are removed.
NEW QUESTION # 77
How is SAN Time measured?
Answer: B
Explanation:
Understanding Total Latency: In a FlashArray environment, total latency as seen by the host application is the sum of several components. Pure Storage breaks this down into Array Time and SAN Time to help administrators pinpoint where performance bottlenecks exist.
SAN Time Definition: SAN Time represents the latency introduced by the network infrastructure between the host (initiator) and the FlashArray (target). This includes the time spent traveling across Fibre Channel or Ethernet switches, cables, and host bus adapters (HBAs). It is calculated by taking the total round-trip time measured by the host and subtracting the time the FlashArray spent processing the I/O.
Metric Breakdown: * Array Time: The time the FlashArray takes to process the I/O once it hits the front-end ports (Option C describes internal array time).
SAN Time: The transit time for the request to reach the array and the response to return to the host (Option A).
Wait Time: In ActiveCluster environments, there is also "Mirror Latency," which is the time spent synchronizing data to a peer array (Option B).
Troubleshooting Value: If a user reports high latency but the FlashArray GUI shows very low Array Time, the administrator can look at the SAN Time metric. A high SAN Time indicates an issue with the fabric, such as a failing SFP, a congested switch port, or oversubscribed ISLs (Inter-Switch Links).
NEW QUESTION # 78
How are in-progress asynchronous snapshot transfers monitored from the UI?
Answer: B
Explanation:
According to official Pure Storage documentation regarding Asynchronous Replication management, while replication throughput (bandwidth) can be viewed globally on the Analysis tab, the actual replication status for in-progress snapshot transfers is tracked and monitored on the replication target.
To monitor an in-progress asynchronous transfer from the GUI, a storage administrator must log into the target FlashArray, navigate to Storage -> Protection Groups, and look at the Transfers section within the Protection Group Snapshots panel. This view explicitly details the time the replicated snapshot was created on the source, the time the transfer started, and the current progress of the snapshot being received. If a transfer is currently in-progress, the "Completed" column will remain blank until the snapshot is fully safely written to the target array.
Here is why the other options are incorrect:
From the replication source (C): While the source orchestrates the creation of the snapshot and initiates the data push, the granular transfer completion status and historical transfer logs of the incoming snapshots are tracked on the target's Protection Group interface.
From the either the replication source or target (B): Because the specific "Transfers" tracking panel for asynchronous protection group snapshots is located on the receiving end (target), monitoring the granular completion status cannot be done symmetrically from either side in the UI.
NEW QUESTION # 79
What is the Pure Storage recommended Maximum Transmission Unit (MTU) size for the replication ports on a FlashArray?
Answer: B
Explanation:
Understanding MTU: The Maximum Transmission Unit (MTU) defines the largest size of a packet or frame that can be sent in a single network transaction. The standard Ethernet MTU is 1500 bytes. Anything larger than 1500 bytes is referred to as a Jumbo Frame.
Replication Efficiency: Replication involves moving large amounts of data between arrays. Using standard 1500-byte frames results in higher overhead because the CPU must process a larger number of headers for the same amount of data. By increasing the MTU, the FlashArray can pack more data into each frame, reducing CPU interrupts and improving overall throughput.
The Pure Recommendation: Pure Storage specifically recommends an MTU of 9000 for both iSCSI and Replication traffic. This is the industry standard for Jumbo Frames that balances efficiency with compatibility across most enterprise-grade switches.
Configuration Requirements: It is critical to remember that MTU must be configured end-to-end. For an MTU of 9000 to work on the replication ports:
The FlashArray replication ports must be set to 9000.
The network switches along the path (and any routers/ISLs) must support and be configured for at least 9000.
The target array's replication ports must also be set to 9000.
Why 9216 (Option A) is incorrect: While some switches support a "Baby Giant" or slightly larger MTU like 9216 to account for VLAN tagging overhead, Pure's internal and best practice documentation specifically points to 9000 as the standard setting for the array's interface.
NEW QUESTION # 80
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