Dell EMC Exam D-XTR-DY-A-24 Topic 2 Question 1 Discussion

Actual exam question for Dell EMC's Dell XtremIO Deploy Achievement exam

Question #: 1
Topic #: 2

[All Dell XtremIO Deploy Achievement Questions]

Refer to the exhibit.

Refer to the Exhibit.

An XtremlO administrator is asked to provide a copy of a 25 TiB database to a

group of users. Each user needs to have their own copy of the database in order to

perform a variety of manipulations on the dat

a. This process needs to be repeated

every day of the week. The administrator is concerned about the time it will take to

make the initial copy of the database and is investigating the use of snapshots of

snapshots.

How does each snapshot impact its ancestor?

AEach first write to each snapshot will trigger a COFW from its ancestor

BEach first access to each snapshot will trigger a COFA from its ancestor

CEach snapshot can be considered a unique volume and has no impact
on its ancestor

DEach first write to a block of the production volume will trigger a COFW
to each child snapshot

Show Suggested Answer

Suggested Answer: C

In the XtremIO environment, snapshots are treated as unique volumes that are independent of their ancestors. When a snapshot is created, it is essentially a point-in-time copy of the data from the source volume. These snapshots operate independently and do not affect the performance or data integrity of the original volume. Any changes made to a snapshot do not impact the ancestor volume, and vice versa. This allows for efficient use of storage resources and enables multiple users to work with their own copies of the database without affecting the original data.

The process of using snapshots of snapshots, also known as cascaded snapshots, is efficient in XtremIO due to the system's unique data reduction and copy data management (CDM) capabilities. Since only changes from the original are stored, it minimizes the additional storage space required for each user's copy of the database. This approach is particularly beneficial when the same process needs to be repeated daily, as it saves time and storage resources1.

by Elvis at Jul 12, 2024, 05:02 AM

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Sherman

25 days ago

Haha, I bet the administrator is wishing they had a magic wand to make these 25 TiB databases appear out of thin air! But in all seriousness, I'm going with B. The question is specifically asking about the impact on the ancestor, so COFA seems like the way to go.

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Asuncion

25 days ago

I'm not sure, but I think the rationale behind option A is that each snapshot is linked to its ancestor through copy-on-write functionality.

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Georgene

1 months ago

D seems more logical to me. The administrator is concerned about the time it takes to make the initial copy, so I'm guessing each write to the production volume will trigger a COFW to the child snapshots.

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2 months ago

I think the answer is A) Each first write to each snapshot will trigger a COFW from its ancestor.

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