DES-1423 Specialist – Implementation Engineer, Isilon Solutions Exam

Certification Overview
This certifies a student can install, implement, manage and administer an Isilon scale-out storage solution in a live datacenter environment.

Certification Requirements
To complete the requirements for this certification you must:
1. Achieve one of the following pre-requisite certifications*
• Associate – Information Storage and Management Version 2.0
• Associate – Information Storage and Management Version 3.0
• Associate – Information Storage and Management Version 4.0
• Specialist – Implementation Engineer, Isilon Solutions Version 2.0
• Specialist – Systems Administrator, Isilon Solutions Version 2.0

Overview
This exam is a qualifying exam for the Specialist – Implementation Engineer, Isilon Solutions (DCS-IE) track.
This exam focuses on the implementation of an Isilon scale-out storage solution. The course prepares students to perform Isilon cluster installation and implementation. Students will be familiar with Isilon software modules and configurations including: SmartConnect , SMB, NFS, multi-protocol, data protection/replication in single and multi-cluster implementations, archive deployment, snapshots and replication, deduplication, RBAC, SNMP integration, analytics, support and monitoring.

Dell Technologies provides free practice tests to assess your knowledge in preparation for the exam. Practice tests allow you to become familiar with the topics and question types you will find on the proctored exam. Your results on a practice test offer one indication of how prepared you are for the proctored exam and can highlight topics on which you need to study and train further. A passing score on the practice test does not guarantee a passing score on the certification exam.

Products likely to be referred to on this exam include but are not limited to:
• OneFS v8.2
• InsightIQ 3.0
• Isilon Generation 5 Nodes
• Isilon Generation 6 Nodes

Exam Topics
Topics likely to be covered on this exam include:

Isilon Fundamentals and Authentication (16%)
• Describe the Isilon storage concepts such as Scale out versus Scale up, architecture, and OneFS details
• Identify and describe Isilon hardware components and intended use cases including both Gen 5 and Gen 6 hardware types
• Identify and describe how an administrator accesses a cluster using WebUI, SSH, and Multi-factor SSH
• Describe cluster dependencies on NTP, LDAP, Active Directory, and other dependent configurations

Isilon Networking (17%)
• Configure Access zones and base directories with the proper folder structure layout
• Describe the basic internal and external network configurations, multi-tenancy, groupnets, subnets, pools and rules
• Identify and explain the various network configurations in Gen 5 and Gen 6 including link aggregation, failover LACP, FEC, and Round Robin
• Describe how to integrate SmartConnect, SmartConnect zones, DNS, SSIP, IP address pools, and load balancing
• Explain the use of VLAN, SBR, and NANON

Authentication, Identity Management, Authorization (10%)
• Differentiate the use of RBAC and ZRBAC
• Explain the use of user identifiers and the proper use of ID mapping
• Identify and describe POSIX and ACLs permission rubrics

Client Protocols, Hadoop, and Auditing (13%)
• Describe OneFS caching levels and use cases
• Configure SMB shares with SMB3 Continuous Availability (CA) and Server-Side Copy with protocol auditing and file filtering
• Configure NFS exports with NFSv4 Continuous Availability (CA)
• Identify and describe Hadoop and Swift configurations and features

Data Protection and Layout (14%)
• Identify FEC data protection levels, file striping, and Reed-Solomon protection definitions
• Differentiate between requested, suggested, and actual protection levels and verify with isi get commands
• Differentiate concurrent and streaming data layout models, use cases, and performance impacts
• Explain storage pools, policies, neighborhoods, global namespace, spillover, and VHS

OneFS Modules and Data Services (13%)
• Differentiate between SmartPools, storage pools, SSD usage, and file pool policies
• Describe how SmartQuotas are configured and identify the characteristics of SmartDedupe capabilities
• Identify SnapshotIQ features, CoW and RoW mechanics, and scheduling
• Identify and describe how to prepare the cluster for SyncIQ disaster recovery

OneFS Job Engine (10%)
• Identify and describe the OneFS Job Engine architecture, components, and workers and circumstantial modes
• Describe the various job types, exclusion sets, priorities, and impacts
• Describe how jobs are managed in real time and how the schedule is maintained

Upgrades and Monitoring (10%)
• Describe how upgrades are applied to a cluster including rollback and commit options
• Explain the importance of firmware updates, ARR, and the Upgrade Helper tool
• Describe the installation of InsightIQ monitoring and reporting, and the use of isi statistics commands
The percentages after each topic above reflects the approximate distribution of the total question set across the exam.

QUESTION 1
When reviewing the actual protection output of N+4/2, what does the number “4” represent?

A. FEC stripe units per stripe
B. Hard drives used per stripe
C. Volume stripes per file system
D. FEC stripe units per file system

Answer: A

Explanation:
It’s OneFS FEC protection nomenclature for our “hybrid” protection polices. More generally, it’s written as: N+M/b
where “N” is the number of data stripe units in a stripe, “M” is the number of FEC stripe units in a stripe, and “b” is the number of stripe units in a stripe which are allowed to reside on the same node.

QUESTION 2
What impact can obsolete drive firmware have on an Isilon cluster?

A. Reduces administrative overhead and increases performance.
B. Affects redundancy settings and FEC coding.
C. Affects cluster performance or hardware reliability.
D. Increases runtime and cluster performance.

Answer: C

QUESTION 3
What defines FEC link aggregation mode?

A. Switches to the next interface when the primary interface becomes unavailable.
B. Balances outgoing traffic based on hashed protocol header information that includes source and destination addresses, and VLAN tag.
C. Balances outgoing traffic based on hashed protocol header information that includes source and destination addresses.
D. Balances outbound traffic across all active ports in the aggregated link.

Answer: B

QUESTION 4
In Isilon OneFS, what is a characteristic of CoW with snapshots?

A. Used for small changes, inodes, and directories.
B. Avoids the double write penalty.
C. Increases file fragmentation.
D. Used for more substantial changes such as deletes.

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 5
Which OneFS networking option enables Isilon for DNS multitenant functionality?

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

Answer: A

 

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