Click the calculator icon in the upper left-hand corner.
A clone source LUN is 512 GB in size. It performs 1500 random 4 kB IOPs with a 3:1 R/W ratio. As part of ongoing testing, the clone is fractured for 10 minutes and then resynchronized.
The testing is performed every hour.
How much data (to the nearest GB) is read from the source LUN as part of the resynchronization process?
A. 15 GB
B. 27 GB
C. 54 GB
D. 96 GB
Click the calculator icon in the upper left-hand corner. A clone source LUN is 2 TB in size. It performs 450 random 16 kB 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 GB) is read from the source LUN as part of the resynchronization process?
A. 6 GB
B. 22 GB
C. 44 GB
D. 88 GB
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. 2.03 MB/s
B. 8.13 MB/s
C. 16.25 MB/s
D. 10.16 MB/s
Click the calculator icon in the upper left-hand corner.
Your customer wants to use a SnapView Snapshot of a Pool LUN as part of their backup strategy. You need to determine whether or not the proposed RLP configuration will meet the performance requirement. The source LUN performs 800
random 4 kB IOPS, with a 3:1 R/W ratio.
At what rate is chunk data written into the RLP when the session starts?
A. 6.25 MB/s
B. 7.8 MB/s
C. 12.5 MB/s
D. 31.25 MB/s
A VNX customer is using storage pools and FAST Cache to support a mixed workload environment. The mission-critical application is SAP with an underlying MS SQL database. The SQL database has an IO profile that is well suited for FAST Cache. The customer would like to increase the efficiency of FAST Cache while not degrading the performance in any way. Cost is not a consideration. What action should the SE recommend to improve FAST Cache efficiency?
A. Review the SP Collects and .nar data to determine which pools currently have FAST Cache enabled. Recommend FAST Cache only on pools that generate small to medium random IO.
B. Review the SP collects and .nar data to determine if the FAST Cache is currently at the maximum supported value. If it is not, recommend adding additional SSDs to FAST Cache.
C. Discuss the benefits of VNX with MCx in regard to FAST Cache and DRAM cache improvements.
D. Request an EMC Customer Engineer perform a comprehensive health check of the array to determine if any hardware faults exist.
A customer asks about the High Bandwidth option for a data warehousing application. The customer would like to know the benefits of implementing this feature. How do you respond?
A. Increased queue depth and increased stripe element size
B. Symmetric Active/Active and increased queue depth
C. Increased Full Stripe Writes (FSW)
D. Increased random, small-block read performance
A customer recently added a large number of new users to their VNX for Block storage system. They now notice that the system is slow. You have been asked to fix this problem. Their configuration uses only Classic LUNs. They have some
unused Flash drives. Analysis shows that several LUNs have skew rates of 90% or higher.
Which technology would you implement to solve their performance problem?
A. FAST Cache
B. FAST VP
C. Flash RG
D. Pool LUNs
Which is an EMC Best Practice when configuring the High Bandwidth option for Pool LUNs?
A. This option is unsupported for Pool LUNs.
B. Use with LUNs in multi-tier storage pools.
C. Limit use to VNX File OE LUNs.
D. Use only with RAID 5 single-tier storage pools.
A Customer is considering purchasing a new VNX but can't decide whether to go with Classic RAID groups or pools. They would like to know the performance differences between the two when creating Thick LUNS. What would be the best response?
A. Thick pool LUNs typically perform at around 90% of a classic LUN.
B. Classic LUNs typically perform at around 90% of a Thick pool LUN.
C. Thick pool LUNs typically perform at around 80% of a classic LUN.
D. Classic LUNs typically perform at around 80% of a Thick pool LUN.
A customer has an application that uses a dataset of 20 TB. The skew for the application is 97%. The application requires storage capable of performing 13,000 IOPs. The application R/W ratio is 3:1 The VNX system for the application has the following disk configuration:
Ten FAST Cache optimized 200 GB Flash drives
Ten FAST VP optimized 100 GB Flash drives
Twenty 600 GB 15 krpm SAS drives
Fifty 2 TB NL-SAS drives
The customer wants to implement the most efficient solution. How should the pool for the application be configured?
A. 5x 200 GB FAST Cache optimized Flash configured 4+1 R5 5x 600 GB 15 krpm SAS drives configured as 4+1 R5 16x 2 TB NL-SAS drives configured as 6+2 R6
B. 5x 200 GB FAST Cache optimized Flash configured 4+1 R5 8x 600 GB 15 krpm SAS drives configured as 4+4 R1/0 16x 2 TB NL-SAS drives configured as 6+2 R6
C. 10x 100 GB FAST VP optimized Flash configured 4+1 R5 10x 600 GB 15 krpm SAS drives configured as 4+1 R5 8x 2 TB NL-SAS drives configured as 6+2 R6
D. 5x 100 GB FAST VP optimized Flash configured 4+1 R5 10x 600 GB 15 krpm SAS drives configured as 4+1 R5 8x 2 TB NL-SAS drives configured as 6+2 R6
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