B. Avoids the double write penalty.
C. Increases file fragmentation.
D. Used for more substantial changes such as deletes.

Answer(s): A
Explanation:
With copy on write, as the name suggests, a new write to HEAD results in the old blocks being
copied out to the snapshot version first.
Although this incurs a double write penalty, it results in less fragmentation of the HEAD file,
which is better for cache prefetch, etc.
Typically, CoW is most prevalent in OneFS and is primarily used for small changes, inodes and
directories.
Reference:
https://www.del emc.com/resources/en-us/asset/white-papers/products/storage/h15048-wp-
next-gen-data-protection-snapshot-iq.pdf
QUESTION: 5
Which OneFS networking option enables Isilon for DNS multitenant functionality?

A. Groupnet
B. Access zone
C. Pool
D. Subnet

Answer(s): A
Explanation:
Groupnets are designed to enable multi-tenant DNS support per access zone.
Reference:
https://www.del .com/community/Isilon/Multiple-groupnets-using-the-same-subnet/td-p/7152525
QUESTION: 6
A company wants to re-use HD400 nodes into a new cluster with OneFS 8.2.0. What is the
minimum number of HD400 nodes required?

A. 3
B. 4
C. 5
D. 6

Answer(s): A
Reference:
https://www.commoncriteriaportal.org/files/epfiles/383-7-148%20ST%20v1.0.pdf (9)
QUESTION: 7
On which node does the SSIP initially reside?

A. Highest node ID
B. Lowest node ID

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