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DEE-1421 – Expert - Isilon Solutions Exam

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Showing 1–3 of 10 questions

Question 1

Case Study 4

A company is experiencing a noticeable decrease in performance when accessing data on their Dell EMC Isilon cluster. The cluster hosts Microsoft Windows home directories and general purpose file shares. In addition, a file pool policy moves data that has not been modified in six months to an achieve tier. The administrator wants your assistance in understanding the reason for the slow data access. The number of users accessing the cluster has not changed. The administrator has shared the following baseline metrics. The outputs were captured from a performance- acceptable time frame.

Trace route shows:

-3 hops between clients and the cluster -Average latency is 3 ms Iperf shows:

-940 Mb/s average bandwidth

-005 ms average jitter

Netstat on the local network shows: -05% average re-transmission rate Hostcache list:

-20 ms average roundtrip time across all clients

The administrator shows you the following output from the netstat command:

32366653 data packets (35556615947 bytes)

8010 data packets (9525723 bytes) re-transmitted

Based on the output, what information should be provided to the administrator?

Select an option, then click Submit answer.

  • ○

    Re-transmission rates have no impact on performance
  • ○

    Re-transmission rate exceeds recommendations
  • ○

    Re-transmission rate is in the acceptable range
  • ○

    Change in the re-transmission rate indicates an issue
Question 2

A company has a cluster with two subnets. The first subnet has 1 GbE interfaces dedicated for management and the second subnet has 10GbE interfaces dedicated for handling all data access. When the cluster started serving the production environment, poor performance was observed while the data is accesses through the data subnet. While troubleshooting the network, the administrator discovered that the return traffic is going through the management network.

Which recommended solution will resolve this issue?

Select an option, then click Submit answer.

  • ○

    Change the gateway priorities
  • ○

    Enable destination-based routing with static routes
  • ○

    Enable source-based routing
  • ○

    Configure static routes for both subnets
Question 3

SPECIAL INSTRUCTIONS

The remaining Part1 questions are associated with four case studies that describe various environments or settings. Each case study appears on its own display screen. Questions for each case study will appear on separate display screens.

When displaying a question, you can easily review the related case study by clicking on the “Review Case Study” icon shown below:

Case Study 5 – Refer to the Exhibit.

Backing up data from a Dell EMC Isilon cluster exceeds the company’s backup window. Because the company has a large amount of data with a continuous high growth rate, they want to change their backup strategy. The Gen 6 Isilon cluster consists of 24 nodes. Their current backup strategy is an NDMP three-way backup performing weekly full backups to tape and incremental backups each night. The strategy uses Dell EMC NetWorker. The DMA uses Include paths to specify what data to backup. All data on the cluster must remain accessible.

The company’s IT team is now looking for a method to increase the performance of their backups. After some investigations, you notice that the backup job quiesces the file system. This is creating lock contention issues on open files and not allowing users full access to data when the backup job runs.

What advice should be provided to the team to eliminate lock contention and allow full access to users?

Select an option, then click Submit answer.

  • ○

    Create a cron job to remove all locks before each backup.
  • ○

    Add A100 Backup Accelerators and configure for three-way NDMP
  • ○

    Stop using an NDMP-based backup strategy.
  • ○

    Enhance the backup strategy using snapshots for backups.