EMC VNX Solutions Expert Exam for Technology Architects - E20-880 Exam Practice Test
Your customer wants to enable file deduplication on an existing data-populated VNX for File system, based on the following specifications:
-Moderately busy file system scan rate: 500 files per second -Moderately busy file system ingest scan rate: 5 MB/sec -Number of files: 1 M -Average file size: 50 KiB -Estimated deduplication: 30%
How long will the initial deduplication take to complete?
-Moderately busy file system scan rate: 500 files per second -Moderately busy file system ingest scan rate: 5 MB/sec -Number of files: 1 M -Average file size: 50 KiB -Estimated deduplication: 30%
How long will the initial deduplication take to complete?
Correct Answer: D
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A customer has deployed various applications on a VNX storage system.
During a performance analysis, you notice several hot spots on different drives and enclosures. Upon further investigation you discover that all storage system ports are in use, and that all ports are supporting the same number of enclosures and disk drives.
What will you recommend to your customer?
During a performance analysis, you notice several hot spots on different drives and enclosures. Upon further investigation you discover that all storage system ports are in use, and that all ports are supporting the same number of enclosures and disk drives.
What will you recommend to your customer?
Correct Answer: C
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A customer has recently virtualized an Oracle database on a VNX system. Initially, performance was satisfactory. Now, with more usage there is some performance degradation. You used Analyzer to check the backend and did not see any problems.
Which VMware best practice would be easiest to resolve the issue?
Which VMware best practice would be easiest to resolve the issue?
Correct Answer: D
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A customer is trying to determine the correct configuration for an application they are planning to run on a VNX. The application consists of a heavy sequential workload with high (greater than 30%) writes.
Which drive type and configuration would you recommend to the customer?
Which drive type and configuration would you recommend to the customer?
Correct Answer: B
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Replication Manager (RM) is being used to create replicas for a SQL server installed on VMFS residing on an ESX server. The operations are sent from a separate virtual RM proxy host. However, the RM is not able to successfully create copies.
What is the most likely cause of the failure?
What is the most likely cause of the failure?
Correct Answer: D
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A VMware v4 customer is considering consolidation of their environment to support their cloud IAAS (Infrastructure as a Service) initiative on VNX storage. They have a number of customers interested in deploying clustered application servers, across many varied application environments, onto this new infrastructure.
What advice would you give your customer to help them formulate their new environment and minimize their administrative overhead?
What advice would you give your customer to help them formulate their new environment and minimize their administrative overhead?
Correct Answer: C
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Replication Manager (RM) is being used to create replicas for a SQL server installed on VMFS residing on an ESX server. The operations are sent from a separate virtual RM proxy host. However, the RM is not able to successfully create copies.
What is the most likely cause of the failure?
What is the most likely cause of the failure?
Correct Answer: B
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A customer with a virtualized environment has asked you to architect a new VNX storage solution utilizing their many NFS datastores. They are also deploying a new Cisco Unified Computing System as their compute base. However, they believe that virtualizing their critical servers may cause network performance concerns because these servers have a very high transaction rate with a CPU bound application.
How would you respond to your customer's concerns?
How would you respond to your customer's concerns?
Correct Answer: D
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Click the calculator icon in the upper left-hand corner.
A Snapshot Source LUN performs 650 random 16 kB IOPs, with a 4:1 R/W ratio.
At what rate is chunk data written into the RLP when the session starts?
A Snapshot Source LUN performs 650 random 16 kB IOPs, with a 4:1 R/W ratio.
At what rate is chunk data written into the RLP when the session starts?
Correct Answer: C
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The customer wants to display File System statistics data in Unisphere.
What is the default polling interval (Minutes) for Statistics Logging?
What is the default polling interval (Minutes) for Statistics Logging?
Correct Answer: B
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Your customer has recently purchased a VNX to host their three Oracle RAC database environments and automated payment processing application. The RACs and application are differentiated as follows: ORA-PROD, ORA-STAGE, ORA-DEV, APP-PROD, APP-STAGE, and APP-DEV.
The customer has provided you with their Enterprise Storage Policy (ESP) and is requesting that you adhere to this policy when architecting their new VNX solution. The ESP states the following as it relates to Oracle database storage requirements:
-All LUNs must be configured as raw devices -All LUNs must be managed using ASM -No fewer than two LUNs per ASM disk group -No more than one database per RAC per RAID Group -No more than three databases per RAID group -All data LUNs must be 1000 GiB RAID 5 -All FRA LUNs must be 500 GiB RAID 1/0 -No more than eight total disks per RAID Group -No fewer than four disks per RAID Group
Based on the ESP, and assuming ORA-PROD has six instances, what is the minimum number of RAID Groups required?
The customer has provided you with their Enterprise Storage Policy (ESP) and is requesting that you adhere to this policy when architecting their new VNX solution. The ESP states the following as it relates to Oracle database storage requirements:
-All LUNs must be configured as raw devices -All LUNs must be managed using ASM -No fewer than two LUNs per ASM disk group -No more than one database per RAC per RAID Group -No more than three databases per RAID group -All data LUNs must be 1000 GiB RAID 5 -All FRA LUNs must be 500 GiB RAID 1/0 -No more than eight total disks per RAID Group -No fewer than four disks per RAID Group
Based on the ESP, and assuming ORA-PROD has six instances, what is the minimum number of RAID Groups required?
Correct Answer: A
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Your customer is reporting less than optimal performance for their online payment processing application. The payment processing application is running on a Windows Server cluster with the back-end Oracle databases running on Oracle Enterprise Linux (OEL). Both the application and database environments have been presented storage from the customer's VNX solution.
Which tool is best suited to identify database performance issues?
Which tool is best suited to identify database performance issues?
Correct Answer: B
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A clone source LUN is 1 TiB in size. It performs 450 random 8 KiB IOPs with a 2:1 R/W ratio. As part of ongoing testing, the clone is fractured for five minutes and then resynchronized. The testing is performed every hour.
How much data (to the nearest GiB) is read from the source LUN as part of the resynchronization process?
How much data (to the nearest GiB) is read from the source LUN as part of the resynchronization process?
Correct Answer: B
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A customer built a VDI on a VNX array. The customer currently has only NL-SAS drives. The customer wants to simulate I/O characteristics of users accessing the storage from the virtual desktops. What tool should be recommended?
Correct Answer: B
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