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D-XTR-OE-A-24学習範囲 & D-XTR-OE-A-24認定試験トレーリング
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EMC D-XTR-OE-A-24 認定試験の出題範囲：
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出題範囲
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EMC Dell XtremIO Operate Achievement 認定 D-XTR-OE-A-24 試験問題 (Q51-Q56):
質問 # 51
A company requires hourly snapshots to be taken from a set of 15 volumes. Assuming no other volumes or snapshots exist, approximately how long can an XtremIO X1 array continue to fulfill this request until the system maximum is reached?
正解：B
解説：
* 512 hours: This is calculated based on the system's capacity to handle hourly snapshots. For 15 volumes, taking snapshots every hour, the system can sustain this operation for approximately 512 hours until the maximum limit is reached.
* XtremIO's efficient snapshot management allows for a large number of snapshots without significant performance impact.
References:
* Dell XtremIO Snapshot Management Guide
* XtremIO Performance and Capacity Planning Documentation
質問 # 52
When configuring disk groups for Oracle ASM using XtremlO as the storage array, what is the recommended redundancy type for the ASM disk groups?
正解：A
解説：
When using XtremIO storage arrays for Oracle ASM disk groups, the recommended redundancy type is typically external redundancy.This is because XtremIO arrays are built with inherent data protection and redundancy features that eliminate the need for additional mirroring at the ASM level1.
* External Redundancy: With external redundancy, Oracle ASM does not mirror data within the disk group. Instead, it relies on the underlying storage system to provideredundancy and data protection.XtremIO's unique data protection scheme, XDP (XtremIO Data Protection), provides such redundancy1.
* XtremIO Features: XtremIO arrays are designed with high levels of fault tolerance and include
* features like SSD failover and advanced error correction.These features ensure data integrity and availability, making external redundancy a suitable choice1.
* Performance Considerations: Choosing external redundancy can also lead to better performance since it avoids the overhead of additional mirroring at the ASM level, which is unnecessary given XtremIO's capabilities1.
* Best Practices: Dell EMC recommends using external redundancy for ASM disk groups when using storage arrays like XtremIO that provide their own robust data protection mechanisms1.
In summary, for Oracle ASM disk groups using XtremIO storage arrays, external redundancy (OC) is the recommended setting, as it leverages the array's built-in redundancy features and optimizes performance1.
質問 # 53
A company requires synchronous replication from an XtremlO X1 cluster to a third-party array. Which replication solution will allow the company to perform this operation?
正解：C
解説：
For synchronous replication from an XtremIO X1 cluster to a third-party array, the solution that enables this operation isVPLEX with RecoverPoint. Here's why:
* VPLEX: Dell EMC VPLEX is a virtualization and data mobility solution that allows for continuous availability and data mobility across arrays within a data center and over distance.It is often used in conjunction with RecoverPoint to provide synchronous replication1.
* RecoverPoint: Dell EMC RecoverPoint offers continuous data protection with multiple replication options, including synchronous and asynchronous replication.It is designed to work with various storage arrays, including third-party arrays, providing flexibility in replication strategies1.
* Combination of VPLEX and RecoverPoint: When combined, VPLEX and RecoverPoint offer a comprehensive solution that supports synchronous replication, ensuring zero data loss (RPO=0) and enabling consistency across sites.This combination is particularly useful when integrating XtremIO with third-party arrays1.
* Native XtremIO Replication: While XtremIO does offer native replication capabilities, these are typically asynchronous and are designed to work within the XtremIO ecosystem.For synchronous replication, especially to a third-party array, the native replication may not be sufficient1.
* RecoverPoint for VMs: This variant of RecoverPoint is specifically designed for virtual environments and may not be the best fit for array-based synchronous replication requirements1.
Therefore, the correct answer isVPLEX with RecoverPoint(OD), as it provides the necessary infrastructure and capabilities for synchronous replication from an XtremIO X1 cluster to a third-party array, ensuring data consistency and zero data loss during the replication process1.
質問 # 54
When using the Microsoft VSS Framework with an XtremlO cluster to manage snapshot backups, what is the correct sequence of steps to create a Windows volume backup?
正解：
解説：
Explanation:
The correct sequence of steps to create a Windows volume backup using the Microsoft VSS Framework with an XtremIO cluster is:
* Requestor interacts with the VSS service to start the backup
* VSS service sends a Freeze request to the Writer
* Provider creates an XVC of the file system and exposes the volume to the host
* VSS service sends a Thaw request to the Writer
* Requestor uses the XVC to back up the content of the volume
This sequence ensures that the backup is consistent and data integrity is maintained throughout the process.
References:
* Dell XtremIO VSS Integration Guide
* Microsoft VSS Framework Documentation
質問 # 55
What is the default Logical Block size when creating an XtremlO volume?
正解：A
解説：
* The default logical block size when creating an XtremIO volume is 4 KB.
* This block size is optimized for performance and efficiency, ensuring that the storage array can handle small random I/O operations effectively.
* Properly configured block sizes are essential for achieving optimal performance in high-demand storage environments.
References:
* Dell XtremIO X2 Technical Specifications
* XtremIO Volume Configuration Guide
質問 # 56
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