Advance Your Career by Using Online D-PSC-DS-23 Dumps

1. A customer wants an N+3 protection level on their cluster.

What is the minimum number of nodes they need to achieve that level of protection?

2. How is the journal protected in Gen 6 hardware?

3. During an NDMP backup restore using ShallowCopy, a version check fails.

Which restore option should you switch to?

4. A customer wants to use their large Gen 6 Isilon cluster for ILM. All of their data is written to and read from a single file pool. They need to use multiple file pools, so slightly used data is stored on less expensive, large disks. Heavily used data is stored on a faster tier.

What would satisfy the customer’s needs?

5. You are asked to size a cluster for a file sharing environment. nfsstat indicates that no more than 10% of the requests are namespace operations (e.g. GETADDR, SETADDR). There will be 10,000 active Linux users, connecting over NFS.

Which cluster configuration would you recommend?

6. An Isilon cluster has four A200 nodes with 15, 12TB HDDs each. VHS is specified as four virtual drives or 15 percent of the node pool.

Which configuration would be used as reserved space for VHS?

7. We have been engaged by a research hospital to help upgrade their Isilon installation. They currently have 12 previous generation Isilon nodes with 200 TB 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 2 PB of active data and 1 PB 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.

Before making any changes, the customer would like a graphical presentation of their existing array performance to present to management.

What is the best tool to gather this information?

8. A potential customer requires 800TB of usable capacity to store medical images for their network of health clinics.

The IT department has limited staff and currently manages four storage arrays from other vendors. During a meeting with the Director of IT, you learn that the company is planning to deploy a scale-out NAS solution from a competitor of EMC.

Which factors can demonstrate a lower TCO using Isilon?

9. You are called into an opportunity, you would like to get more information on the data skew of the filer. The customer has a supported filer.

What assessment tool would you use to generate this information?

10. A PowerScale cluster is configured with SmartConnect zones using dynamic IP address allocation. Failback is enabled.

If there is a node failure, what happens to the IP address?

11. A company wants to have their new PowerScale Gen6 cluster benchmarked for a UNIX environment.

What commonly available open-source tool is typically used to test PowerScale cluster performance in this environment?

12. A company currently has numerous file servers providing home directories for its employees. Some departments have their own file servers. All corporate users authenticate using Active Directory. The engineering department has their own untrusted AD domain for their file servers.

The company is looking for a consolidated solution that requires minimal changes to the environment, and that creates a single namespace for the home directories.

What is the recommended solution that will meet this company's requirements?

13. 108NL

They have a Smartpool license and believe that tiering data would help free up needed space.

After talking with the customer and explaining the use of SmartPools, how would you recommend optimizing utilization across all of the nodes that the customer owns?

14. A customer is having difficulty with SMB authentication against an Active Directory (AD) server.

Which tool is appropriate for analyzing protocol packets between an Isilon cluster and an AD server?

15. An Isilon customer has acquired a company with its own AD and DNS infrastructure. A request is made to consolidate the data from a number of servers at the acquired company onto the existing company's Isilon cluster.

What is the least disruptive way to do this?

16. We have been engaged by a research hospital to help upgrade their Isilon installation. They currently have 12 previous generation Isilon nodes with 200 TB of capacity and run on a 1 Gbps network.

They currently have 6 Illumina Hi-Seq Sequencers and an HPC cluster to process data. They would like to expand Isilon to 2 PB of active data and 1 PB 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.

The customer will add two more Illumina Hi-Seq Sequencers in the next 6 months.

Once these are added, what is the total amount of data from all the sequencers they can expect to add per month?

17. When designing an Isilon cluster for content creation workflows in the Media and Entertainment (M&E) vertical, what type of workflows must you consider?

18. A customer has two PowerScale clusters. Cluster1 has eight H700 nodes, and Cluster2 has twelve A300 nodes. The customer wants to monitor real-time performance data of both clusters and track file growth.

Which tool should be recommended?

19. A PowerScale administrator has a cluster containing four F600 nodes. They must configure FTP connections for anonymous access that requires no authentication.

What is the result of this configuration?

20. A healthcare services provider is implementing an X-Series cluster. Currently they have approximately 200 customers and they are growing at 30% per year. They have 200 TB of storage utilized.

Health Insurance Portability and Accountability Act (HIPAA) regulations require they keep all patient data for seven (7) years. They would like to keep all genomic sequencing data stored with N+3 protection, not to exceed 75% utilization.

What is the minimum initial configuration you would recommend?

21. A company needs to have their data asynchronously replicated. They also need to maintain a daily copy of the data for a week at the target side to enable fast recovery of files. They decide to purchase two Isilon clusters. They do not want to spend money unnecessarily.

Which licenses must they acquire?

22. You are designing a backup solution using an NDMP redirector and throttler.

What is the default threshold percentage of CPU resources that the throttler limits NDMP to?

23. An Isilon storage administrator is concerned about capacity after ingesting 200 TB of file data. They recently added more nodes to the cluster and now want to auto-balance it as soon as possible.

The cluster utilization percentages for an average 24-hour period are:

- 45% during 00:00 - 08:59

- 60% during 09:00 - 17:00

- 85% during 17:01 - 23:59

The administrator wants to keep cluster utilization at a minimum.

Which Impact Policy settings should be used to quickly complete the job without impacting the production workload?

24. What is the sector size of an Isilon 8 TB drive?

25. Three jobs are running, all with a priority of 5. A new job with a priority of 6 needs to be run.

What happens?

26. How many Z9264 switches are required for a A3000 cluster consisting of 160 nodes using a 25 GbE for a complete back-end network?

27. Where are file system changes first stored?

28. An insurance company is using PowerScale H700 nodes to store their data. A systems administrator conducts a capacity assessment and notices that the available space has decreased significantly.

During investigation, the administrator finds that several users are storing their PST and MP4 files on the cluster which occupies a large amount of storage space.

What can the administrator do to prevent such situation to happen in the future?

29. A new customer is interested in an Isilon Gen 6 solution to replace their sprawling and outdated Linux environment.

Which client tool should you use to establish an estimate of the workload and pattern as an input to the sizing process?

30. A customer has 10 files that are each 10 MB in size. They created two clones of each file on their source cluster. They now want to use SyncIQ to replicate the original files and the cloned files to a target cluster.

Excluding protection overhead, how much disk space will the files use on the target cluster?

31. A company wants to have their new Gen 6 Isilon cluster benchmarked for a UNIX environment.

What commonly available open source tool is typically used to test an Isilon cluster's performance in this environment?

32. What are two output options from the PowerScale cluster events log? (Select 2)

33. Consider the access permissions for a file stored on PowerScale.

What attributes does a file have if it is described as having a Synthetic ACL?

34. A customer is experiencing problems writing data to their PowerScale cluster. You have checked all network settings and authentication sources. No errors are reported on the cluster.

Which command can the customer use to collect information about network activity, network packets, and network latency?

35. A customer configures a file pool policy to write data to tier 2 on the Isilon cluster. This is in addition to the 30 policies already created. Later in the week they check the file placement and see that it has not been written to the correct tire.

What could be the problem?

36. A customer has eight X400 24GB RAM that supports 400 client connections today The customer plans to add 400 more clients in the next few months. They are looking at adding an A-Series node to the cluster to help with client connections.

Before they start adding client connections, what hardware change do you recommend?

37. A customer has a large, multi-tier Isilon Gen 6 cluster storing home directories and critical file share data.

Which OneFS feature should be used to segregate home directory from critical file shares, enabling data archive across a single namespace?

38. A customer wants to replace a legacy storage environment used for high definition video editing. Each workstation connecting to the shared storage needs to sustain 650 MB/s of single stream bandwidth.

Which node type is recommended?

39. What is the minimum size and the maximum size, respectively, of a single pre-Gen 6 node pool?

40. A customer needs to consolidate 300 TB of home directory servers and shared file systems used by development and test groups. A key requirement is to prevent the systems from consuming all free capacity and impacting home directory content.

Which Isilon node configuration should be proposed?

41. What is used to set permissions for devices managed by Secure Remote Services?

42. A potential customer has about 540TB of NetApp running in ONTAP 7-Mode. They are willing to let you gather some workload data. They have LDAP and Active Directory authentication and primarily Windows Clients. They are very interested in Automated Tiering and Large Scale Archives.

They are not certain about the workflows from the Marketing Department. The Content Team will only say they need to acquire 300 TB within 90 days. They do not know the average file size or the number of aggregates they are managing.

Which tools would you use to gather information to do your Isilon sizing?

43. What is the maximum number of file pool policies supported in an Isilon cluster?

44. You have gathered information from your customer about their current NAS environment. They indicated they are having performance and time-out issues with their clients accessing the storage. Currently over 5000 clients are simultaneously accessing the NAS; however, this will double in the next year.

Based on this information, what recommendations for a new Isilon cluster would you give to the customer based on this information?

45. Which two auditing capabilities are used in OneFS monitoring? (Select 2)

46. A customer has a 5 node Isilon cluster. The raw capacity of the cluster is 85% used. On average, the cluster has 4,000 users connected during office hours. The average CPU usage is 65%. The customer needs to delete some data to free up capacity.

What should the customer do to minimize the effect of the deletion job?

47. An eight node F900 PowerScale cluster running OneFS 9.4.0 has a dedicated subnet and IP pool for SMB data traffic. SmartConnect Advanced license is applied. The SMB IP pool consists of LACP aggregated 100 GbE interfaces from all the nodes.

What is the maximum number of SmartConnect Service IPs recommended for the SMB subnet?

48. How are clients, L1 cache, L2 cache, and disks interconnected?

49. A PowerScale cluster has two ports that are configured per node. Each port is on a different VLAN. Although incoming traffic is evenly distributed, transmitted data from PowerScale uses one port more than the other port.

What could be the cause of this imbalance?

50. A PowerScale cluster has four A200 nodes with 15, 12 TB HDDs each. VHS is specified as four virtual drives or 15 percent of the node pool.

Which configuration would be used as reserved space for VHS?

51. A customer wishes to back up their Isilon cluster via NDMP using a software package that supports NDMP connectivity. The backup process will require the cluster to create a point-in-time copy of the directory to be backed up.

Which OneFS feature(s) will need to be licensed?

52. Which SyncIQ policy is required if the goal is to have all source data replicated and to retain deleted files?

53. A customer has an SMB file directory with 375 TB of data on the primary cluster with a protection level of N+ 3:1. They want to replicate this directory to the secondary cluster. The customer would like information about the possibility of setting protection levels on the target cluster.

What information can be provided to the customer about the protection level for the target directory?

54. Which type of link aggregation is supported with Isilon nodes?

55. You are designing a cluster for workloads that have a low latency, heavy, random access pattern.

Which node type is designed for this type of workload?

56. A media and entertainment company has asked for help in creating a new Video On Demand (VOD) storage system. The storage would be delivered to 5000 subscribers simultaneously. They would like to store 5000 hours of full length, High Definition (HD) movies.

What would be the best price-to-performance nodes for this solution?

57. A customer is inquiring about expanding their primary cluster consisting of six S-Series nodes in order to improve performance. They have a second cluster with 11 X-Series nodes. Both clusters leverage 1GbE, but the customer recently installed a 10GbE network that can be utilized.

They also have multiple Fibre Channel SAN arrays in their environment. They have a variety of workloads on each cluster and are in the process of determining which workloads belong on which cluster.

They have discovered that one of the workloads- a SQL database that resides on the X-Series node cluster - is experiencing timeouts due to latency. The database vendor has suggested limiting latency to 5ms or less to eliminate these timeouts.

How do you advise the customer?

58. A customer wants to perform complete failover and failback testing on their production SyncIQ policies.

What are the first two recommended steps to ensure a successful test?

59. What must be configured on a PowerScale in order to store only the customer presentation PPT and PDF files on the cluster and the external repository?

60. What are characteristics of the streaming data access pattern on a PowerScale Gen6 cluster?

61. Three jobs of different exclusion sets with a priority level of 5 are concurrently running on a cluster. A new job with a priority of 4 needs to be run.

What does the Job Engine do?

62. A customer has a 24-node PowerScale cluster, they need a solution that tolerates three node failures and four drive failures.

What protection level should be applied?

63. What is a consideration when using SnapshotIQ?

64. A potential customer is considering replacing a four year old, Linux-based NFS server with 40TB of usable capacity. The existing system supports home directories, an internal website, and a content repository for the customer's content management system.

The customer is concerned about performance of any new solution because they expect to double workload in the content management system.

What tools can be used to collect performance data needed to size the new solution?

65. Which cache type contains data blocks from previous read and write transactions?

66. As part of a proof of concept, you are investigating disk performance statistics using the “isi statistics” output.





After reviewing the “TimeAVG” column shown in the graphic, which information should be provided to the customer?

67. A customer is using Hadoop with direct-attached storage. They are concerned about the cost to build and maintain this infrastructure.

What are the benefits of switching to Hadoop with Isilon OneFS?

68. In an NFSv3 only environment, what is the recommended limit for active NFSv3 connections, per Isilon node?

69. There is a concern that there are not enough physical switch ports available for the Isilon cluster in a new implementation with SMB and ICAP requirements.

What course of action should be taken?

70. During initial configuration of a PowerScale cluster, OneFS creates a network using the default internal network interface without a failover option.

What is the default back-end network interface used?

71. One of your customers is interested in a PowerScale Gen6 solution. They have provided basic solution requirements, but their security policies do not allow them to perform detailed data collection for infrastructure and workload analysis.

Which tool should you use to design the new PowerScale solution?

72. Your customer has a new business unit. They are gathering web log files to be analyzed. They are using Hadoop to do the analysis of the logs. The IT department is centrally storing the log files on a 5-node Isilon cluster.

They have enabled the Hadoop cluster to access the files directly on the Isilon storage. The nodes are X400's with two SSD drives in each node and 96GB of RAM.

How many DataNodes does the Isilon cluster have?

73. Following Dell best practices, at what capacity consumption should an organization begin the process of ordering more nodes to add to a cluster?

74. What happens to worker threads running on the same node when there is an excessive number of workers running at the same time?

75. Which level of control does RBAC provide for cluster administration roles?

76. What is the recommended namespace path for the access zone on a new Isilon cluster with SyncIQ license?

77. Refer to Exhibit below.





What is represented by the information shown in the exhibit?

78. Which license is a prerequisite for enabling CloudPools?

79. In a typical PowerScale Hadoop implementation where are the MapReduce computations made?

80. In a multi-tenant environment, which OneFS feature can be used to connect to DNS servers from different tenants?

81. After raw events are processed by the CELOG coalescers, what happens to the data?

82. A company has data protection and recovery requirements that include:

- Point-in-time images of data

- Local data protection

- Directory level granularity

- Manual or scheduled operation

- Minimal storage to maintain

Which Isilon feature satisfies all requirements?

83. What are three benefits of NDMP multistream backup and recovery? (Select 3)

84. A cluster has user quotas that are configured for home directories with hard limits and advisory limits set.

What would be the default setting for calculating user quotas on the cluster?

85. 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 IIlumina 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. The customer has a limited budget.

What would be the best price/performance solution for their active data?

86. By default, which method is used by Isilon OneFS for SSDs?

87. Which service daemon is used by FTP and FTPS to transfer files to and from the cluster?

88. A customer is interested in purchasing an Isilon solution if Active Directory (AD) can automatically create home directories for their newly hired employees.

How should Active Directory be configured to achieve their goal?

89. What should be avoided when designing snapshot schedules?