Passed E20-553 with 90%.
Exam Code: E20-553
Exam Name: Isilon Infrastructure Specialist Exam for Technology Architects
Updated: Aug 28, 2026
Q & A: 82 Questions and Answers
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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Performance, Scalability, and Sizing | 18% | - SmartPools and storage tiering - Cluster sizing and expansion guidelines - Caching and latency optimization - Performance monitoring and tuning |
| Topic 2: Isilon Infrastructure and Architecture | 20% | - Cluster networking and SmartConnect - OneFS operating system fundamentals - Isilon cluster hardware and node types - Node pools, tiers, and compatibility |
| Topic 3: Data Protection and Efficiency | 25% | - Deduplication, compression, and SmartDedupe - FlexProtect and data protection levels - SnapshotIQ and SyncIQ replication - Node failure and SmartFail process |
| Topic 4: Management, Identity, and Protocols | 27% | - Cluster management tools - Role-based administration and RBAC - Access Zones and authentication - Supported access protocols (NFS, SMB, HDFS, HTTP) |
| Topic 5: Advanced Features and Solutions | 10% | - Upgrade and migration considerations - Isilon use cases and workloads - CloudPools and hybrid integration |
Question 1
A customer created one month of snapshots consisting of one snapshot every 8 hours for 30 days on an Isilon cluster using SnapshotIQ. The customer is now deleting the snapshots randomly and is experiencing overhead to the cluster. How can the customer remove the snapshots and avoid the overhead caused by the process?
A. Move the snapshot data to a different tier with SmartPools
B. Remove the directory
C. Snapshots cannot be deleted
D. Delete the snapshots in order
Question 2
What is the minimum number of nodes in an Isilon cluster for N+2 protection?
A. 6
B. 3
C. 9
D. 5
Question 3
Where does SmartCache stage its write cache?
A. NVRAM
B. DISK
C. SSD
D. DRAM
Question 4
An Isilon customer created a scheduled SyncIQ policy to replicate data from an Enterprise-mode SmartLock directory. The source cluster becomes unusable. The target cluster does not automatically allow writes to the data in the replicated SmartLock directory.
What is the most likely reason the target cluster did not automatically allow writes of the data into the SmartLock directory?
A. Automated failover and manual failover are not allowed on SmartLock directories on the target cluster.
B. A SyncIQ job was running while the source cluster became unusable, thereby removing all data in the target directory.
C. SnapshotIQ was not licensed on the target cluster; the snapshot of the directory is not available for use by SyncIQ.
D. SyncIQ Automated failover is not supported for SmartLock directories; however, manual failover is allowed.
Question 5
Which Isilon feature provides the ability to separate administrative rights from data access rights?
A. SmartLock
B. RBAC
C. SmartQuota
D. SmartConnect
Solutions:
| Question 1 Answer: D | Question 2 Answer: D | Question 3 Answer: D | Question 4 Answer: D | Question 5 Answer: B |
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