EMC E20-555 Online Practice Questions and Exam Preparation

EMC E20-555 Online Questions & Answers

• Question 61:

  A customer is configuring Isilon SmartConnect. They have determined that their workload primarily consists of short-lived connections, such as HTTP and FTP. Which load-balancing policy provides the most efficient client distribution?

  A. CPU Utilization
  B. Round Robin
  C. Connection Count
  D. Random Selection
  A. CPU Utilization

• Question 62:

  An Isilon has two ports configured per node. Each port is on a different VLAN. Although incoming traffic is evenly distributed, transmitted data from the Isilon uses one port more than the other port. What could be the cause of this imbalance?

  A. Static routes are configured on the less-used port
  B. A default gateway was not configured on both ports
  C. Source Based Routing is not enabled on the cluster
  D. Priority of the gateway in the less-used port set too low
  B. A default gateway was not configured on both ports

• Question 63:

  Which process is used to protect file system structures against corruption through 32-bit CRC checksums?

  A. Media Scan
  B. Isilon Data Integrity
  C. File System Journal
  D. Dynamic Sector Repair
  B. Isilon Data Integrity

• Question 64:

  Where does SmartCache stage its write cache?

  A. SSD
  B. DISK
  C. NVRAM
  D. DRAM
  D. DRAM

• Question 65:

  How does Isilon SnapshotIQ use storage for snapshots?

  A. Through Changed Block Tracking and only changed data blocks are saved
  B. Works on the file level and saves the entire file no matter what has changed
  C. Works with 4 KiB blocks and will always use that amount of storage, no matter what has changed
  D. Through Changed Block Tracking and always uses a 4 KiB block, even if the data changed is less than that amount
  A. Through Changed Block Tracking and only changed data blocks are saved

• Question 66:

  If a client is mounted to the sixth node in a 20-node Isilon cluster, how much memory cache can that client leverage assuming each node has 8 GB of memory cache?

  A. 16 GB
  B. 40 GB
  C. 120 GB
  D. 160 GB
  D. 160 GB

• Question 67:

  An architect is designing a solution for a new customer. The customer is going to use the cluster to store a large number of files that will be accessed by many users. What IO optimization should be used and what kind of prefetching will take place?

  A. Concurrency, aggressive prefetching
  B. Random, aggressive prefetching
  C. Concurrency, moderate prefetching
  D. Concurrency, no prefetching
  C. Concurrency, moderate prefetching

• Question 68:

  -- Exhibit -We have been engaged by a research hospital to help upgrade their Isilon installation. They currently have 12 previous generation Isilon nodes with 200TB of capacity and run on a 1Gbps network. They currently have 6 Illumina Hi-Seq Sequencers and an HPC cluster to process data. They would like to expand Isilon to 2PB of active data and 1PB of archive data. They use a third party data and metadata management service (IRODs) to stage data for analysis. The Isilon cluster is mainly used for analysis work with the HPC cluster. -- Exhibit -

  The customer has a limited budget. What would be the best price/performance solution for their active data?

  A. 14 X-Series nodes with no SSD drives and 96GB of RAM
  B. 17 X-Series nodes with SSD drives and 48GB of RAM.
  C. 14 NL-Series nodes with 24GB of RAM
  D. 12 X-Series nodes with no SSD drives and 24GB of RAM
  A. 14 X-Series nodes with no SSD drives and 96GB of RAM

• Question 69:

  -- Exhibit -A large manufacturing company is an existing Isilon customer with a cluster consisting of four NL400 nodes with 4TB drives. The cluster is using N+2:1 protection level and the file system shows that it is 60% utilized. Home directories and file shares comprise 75% of the existing content and the remainder is inactive deep archive. The company has 1,000 employees using Windows and Mac clients participating in a single Active Directory (AD) forest.

  During a meeting with the CIO and Director of IT you discuss the company's recent acquisition ?an engineering firm that specializes in Computer Aided Design (CAD). The engineering firm has 400 UNIX workstations that produce technical drawings which are currently stored on another vendor's SAN solution. The all UNIX environment uses NIS for authentication and name resolution. They do not currently use DNS or LDAP. The engineering company has an old storage system that has been experiencing problems and the CIO would like you to migrate the data onto the Isilon cluster. The CIO would like to eliminate all tape and recover the data onto disk.

  The CIO is concerned about security of the company's intellectual property, especially with the rapid adoption of mobile devices and external cloud content sharing services such as DropBox, Egnyte, and SugarSync. They would like to implement an alternative that provides external file sharing and mobile device synchronization while maintaining security control over the company's data.

  The Director of IT reports that users are storing non-work related content on the Isilon cluster. They would like to limit the amount of capacity that each user can consume in their home directory and want to ensure you provide the capability to easily visualize which users are over their allotment.The company's Windows users currently leverage Windows Shadow Copy to recover files that have been accidentally deleted. The IT department wants to ensure that Mac and incoming UNIX clients have the same functionality.

  The Director of IT also mentions that users are reporting slow response times when browsing their home directories and shared folders. They are concerned that Isilon cannot scale to support their combined requirements.

  -- Exhibit -The CIO approaches you with a new requirement. They would like to reuse the tape library that was previously used for archiving to now be used to back up some of their data.

  What do you recommend to the Director of IT as the best architecture to achieve this goal?

  A. Connect the Tape Library via Fibre Channel to the Isilon cluster and use a third party backup software to initiate an NDMP backup to an accelerator.
  B. Implement a Backup Accelerator and use the internal backup software within the Isilon cluster to move data to the tape library.
  C. Use a Backup Accelerator with SyncIQ to push the data to the tape library via the Fibre Channel ports on the accelerator.
  D. Use a third party backup software and have the Isilon cluster convert the data to LTFS so it can be stored to the tape library.
  A. Connect the Tape Library via Fibre Channel to the Isilon cluster and use a third party backup software to initiate an NDMP backup to an accelerator.

• Question 70:

  A customer is considering moving their NAS data over to Isilon systems. They want to know if the Isilon systems have any limitations regarding snapshots. What explanation can be provided?

  A. There is no hard limit on snapshots.
  B. There is a limit of 1024 snapshots per cluster.
  C. There is a limit of 2048 snapshots per cluster.
  D. There is a limit of 2048 snapshots per directory.
  A. There is no hard limit on snapshots.