DES-1423 Onefs Practice Questions
The free DES-1423: Specialist Implementation Engineer Isilon Solutions questions that deal with onefs, with answers and explanations. The full bank and the timed practice test cover every topic the exam asks about.
Question #5
In Isilon OneFS, what is a characteristic of CoW with snapshots?
Correct answer: 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.
Question #8
What is the correct sequence of actions performed by OneFS to generate an access token?
Match each item to its target.
Correct answer: Perform user mapping = Look up user in external directory services; Look up user in external directory services = Determine on-disk identity; Determine on-disk identity = Perform ID mapping; Perform ID mapping = Perform user mapping
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