A customer wants to expand FAST Cache on their VNX with MCx. They are concerned about performance impact until the new FAST Cache has been created.
What advice would you give the customer regarding the performance impact of changing the FAST Cache size?
A. Destroying the existing FAST Cache should be done during a period with low I/O activity, followed by the creation of the larger sized FAST Cache.
B. FAST Cache can be expanded non-disruptively without any performance impact.
C. Before adding extra drives to the existing FAST Cache, the Read Cache should be disabled and then re-enabled after the expansion has finished.
D. Before adding extra drives to the existing FAST Cache, the Write Cache should be disabled and then re-enabled after the expansion has finished.
A customer would like to have FAST Cache enabled on their VNX with MCx. They are concerned about performance degradation during this event.
What should you tell the customer regarding the performance impact at the moment when FAST Cache is enabled?
A. Enabling FAST Cache can be done at any time during the day without any performance degradation.
B. Enabling FAST Cache should be done at a low I/O moment to minimize performance impact.
C. Manually disable Read Cache, enable FAST Cache and re-enable Read Cache to minimize performance impact.
D. Manually disable Write Cache, enable FAST Cache and re-enable Write Cache to minimize performance impact.
A customer requires their FAST Cache configuration to be destroyed in order to increase FAST Cache size. However, they are concerned about the performance impact that this will cause.
What should you tell the customer to expect?
A. Increased write activity on data disks from LUNs that were FAST Cache enabled
B. Increased write activity on FAST Cache disks from LUNs that were FAST Cache enabled
C. Temporary suspension of all write I/O to DRAM cache
D. Temporarily bypass of DRAM cache by all write I/O
A heterogeneous Pool is created as follows:
5 x 200 GB FAST VP optimized Flash drives, configured as 4+1 R5 10 x 600 GB 10K rpm SAS drives,
configured as 4+1 R5 16 x 2 TB NL-SAS drives, configured as 6+2 R6
Ten equal-sized thick LUNs are created on the pool at 5 minute intervals. No space is left in the pool. All
parameters are left at the default value. Testing is started at 9:00 A.M. on the 10 LUNs using IOmeter. The
R/W ratio for the testing is set at 3:1, and 4 kB random I/Os are performed.
What throughput do you expect to see from the LUN that was created second?
A. 480 IOPS
B. 960 IOPS
C. 4,100 IOPS
D. 5,600 IOPS
A heterogeneous Pool is created as follows:
5 x 200 GB FAST VP optimized Flash drives, configured as 4+1 R5 10 x 600 GB 10K rpm SAS drives,
configured as 4+1 R5 16 x 2 TB NL-SAS drives, configured as 6+2 R6
Ten equal-sized thick LUNs are created on the pool at 5 minute intervals. No space is left in the pool. All
parameters are left at the default value. Testing is started at 9:00 AM on the 10 LUNs using IOmeter. The
R/W ratio for the testing is set at 3:1, and 4 kB random I/Os are performed.
What throughput should you expect to see from the LUN that was created first?
A. 3,500 IOPS
B. 5,000 IOPS
C. 10,400 IOPS
D. 18,200 IOPS
A customer is suffering from hot spots in their single tier pool. Based on research done with Unisphere Analyzer they notice high activity on some drives and modest-to-low activity on other drives.
They decide to expand the pool and let the data relocate itself over all drives available. Immediately after pool expansion finishes they notice they still have hot spots.
Why was the pool data not redistributed equally using performance data?
A. Without FAST-VP, data is only relocated based on capacity, not performance.
B. The relocation should be started manually so the redistribution will take place.
C. Data relocation did not take place because FAST-VP only relocates data across different tiers.
D. No data was actually relocated because the LUNs in the tier were set to "No Data Movement".
You are implementing a VNX solution for a Windows-only host environment. The customer tells you that current host performance is poor, and that the new solution should improve it by at least 50%.
Which tool should you use to begin your investigation?
A. Performance Monitor
B. Unisphere Analyzer
C. IOmeter
D. server_stats
A Storage Administrator with a VNX Unified solution is using the CLI to monitor daily storage performance. They must type long commands to identify and examine their particular desired statistical results. You have been asked to create statistical groups to accelerate and ease the demanding monitoring tasks.
What should you use to accomplish this job?
A. nas_stats
B. server_stats
C. naviseccli
D. iostat
A Storage Administrator with a VNX Unified solution is using the CLI to monitor a highly specific view of daily storage performance. They must type long commands to examine the desired statistical information. You have been asked to accelerate this task.
What is the most suitable solution?
A. Create user-defined statGroups
B. Use Unisphere Statistics for File
C. Use Celerra Monitor Tool
D. Collect statistics from log files
A customer is asking you for help. They are creating a script that will collect data from the array using CLI from the Control Station. They want to gather information on power consumption, temperatures, and input power on the DAE and SPS.
Which command will gather this information?
A. navicli -h spa environment -list -all
B. navicli -h spa getcontrol -all
C. navicli -h spa environment -list -array -power
D. This information cannot be gathered via CLI
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