DELL EMC D-XTR-OE-A-24 Practice Questions
Dell XtremIO Operate Achievement
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1.A systems administrator wants to double the throughput on an existing dual XtremIO X1 10 TB XBrick cluster. All hosts performing I/O to the cluster are configured and tuned according to Dell
Technologies best practices.
To achieve the performance gain, what should be added?
A. A single 10 TB X-Brick Expansion Kit
B. A dual 20 TB X-Brick Expansion Kit
C. A single 20 TB X-Brick Expansion Kit
D. A dual 10 TB X-Brick Expansion Kit
Answer: D
Explanation:
To double the throughput on an existing dual XtremIO X1 10 TB X-Brick cluster, adding a dual 10 TB
X-Brick Expansion Kit is recommended.
XtremIO uses a scale-out architecture, and adding a dual X-Brick expansion will increase both
storage capacity and performance.
This expansion ensures balanced performance improvement and leverages the best practices
configuration already in place for the existing setup.
Reference: Dell XtremIO Scale-Out Performance Guide
XtremIO Expansion Best Practices
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2.What is the minimum and maximum number of SSDs per DAE for an XtremIO X2-S?
A. 18 and 36
B. 36 and 72
C. 12 and 36
D. 18 and 72
Answer: C
Explanation:
The XtremIO X2-S system allows for a minimum of 12 SSDs and a maximum of 36 SSDs per Disk
Array Enclosure (DAE).
This flexibility in the number of SSDs per DAE allows for scalable storage configurations tailored to
varying performance and capacity requirements.
Reference: Dell XtremIO X2-S Technical Specifications
XtremIO Product Documentation
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3.In the XtremIO X1 web interface dashboard, how is the Compression ratio calculated?
A. Unique Data divided by Physical Space Used
B. Logical Space in Use divided by Unique Data
C. Volume Capacity divided by Physical Space Used
D. Logical Space in Use divided by Physical Space Used
Answer: D
Explanation:
The Compression ratio in the XtremIO X1 web interface dashboard is calculated by dividing the
Logical Space in Use by the Physical Space Used. This ratio provides an indication of the data
reduction achieved through compression by comparing the amount of logical data (the size of data
before compression) to the actual physical space it occupies after compression.
Logical Space in Use: This represents the total size of the data as it would appear without any
compression. It’s the amount of space the data would consume if it were stored uncompressed.
Physical Space Used: This is the actual amount of storage space used on the SSDs after the data
has been compressed. It reflects the efficiency of the compression algorithm in reducing the size of
the data.
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Compression Ratio Calculation: The compression ratio is obtained by dividing the Logical Space in
Use by the Physical Space Used. A higher ratio indicates more effective compression, meaning that
the data occupies significantly less physical space compared to its original size.
The compression ratio is a critical metric in storage systems as it directly impacts the total effective
capacity of the array. In the context of XtremIO, which is known for its data reduction technologies,
monitoring the compression ratio helps in understanding the efficiency of storage utilization and
planning for capacity1.
Please note that while I can provide general information on how compression ratios are typically
calculated in storage systems, for the verified answer as per the Official Dell XtremIO Operate
Achievement documents, you would need to consult the document directly or seek information from a
Dell-certified professional who has access to the latest materials and training.
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