You are being asked to help a customer that is having issues with their new data warehouse application that they have just connected to their existing VNX.
The administrator has created a 2 TB pool LUN on 8 NL-SAS drives in a 6+2 raid 6 configuration. The customer does not have the budget to purchase more hardware this quarter but does have a mixture of SAS and NL-SAS drives you can
use.
Which action would you recommend to the customer?
A. Move to SAS drives.
B. Move to NL-SAS drives in a 14+2 Raid 6.
C. Leave the data as is
D. Enable FAST Cache on the pool.
You are being asked to help a customer that is having issues with their new OLTP application that they have just connected to their existing VNX.
The OLTP Administrator has created a 2 TB pool LUN on 8 NL-SAS drives in a 6+2 raid 6 configuration. The customer does not have the budget to purchase more hardware this quarter but does have a mixture of SAS and NL-SAS drives you
can use.
What configuration would you recommend to the customer?
A. Raid 1/0 on SAS drives
B. Leave the data as is
C. Raid 6 on SAS Drives
D. Enable FAST Cache on the pool
What would happen if both watermarks are lowered in a bursty workload environment with EMC VNX?
A. Increases the cache's number of free pages beyond the high watermark
B. Decreases the cache's number of free pages beyond the low watermark
C. Increase the cache's number of dirty pages beyond the high watermark
D. Increases the probability of forced flushing
What size must an I/O exceed for Write Bypass to occur in an EMC VNX with pre-MCx architecture?
A. 1 MB
B. 2 MB
C. 3 MB
D. 11 MB
A LUN has the following settings:
Prefetch TypE. Variable
Prefetch Multiplier: 4
Segment Multiplier: 4
Prefetch DisablE. 4097
Write-aside SizE. 2048
Maximum Prefetch: 4096
What is largest write that will be cached?
A. 1 MB
B. 2 MB
C. 4 MB
D. 512 KB
In designing a disk layout with multiple disk types, which metric should be used for data locality?
A. Seek Distance
B. Queue Length
C. Response Time
D. Utilization
How many threads should be used to provide the best performance to a sequential file system spanning a single 4+1 RAID 5 LUN?
A. One thread for the LUN
B. One thread per physical disk
C. Four threads per dVol
D. Four threads per LUN
A VNX block-only customer is requesting a performance evaluation of their array. The storage administrator asks you what files you will need to perform the assessment. The customer does not have Analyzer licensed. How do you respond?
A. Request the .naz files and SP collects
B. Request the .nar files and SP collects
C. Request the CCC output from the collect_config script
D. Request the .nar files and server_stats output
What is the prefetch mode in MCC that triggers a host to read two logical cache pages?
A. Read More
B. Constant
C. Read Ahead
D. Variable
Your customer is migrating from a VNX to a VNX with MCx. Based on their workload, 16 KB constant prefetch sizes were configured on the VNX to improve performance. The customer wants to implement the same configuration on the VNX with MCx.
What is the smallest prefetch size on VNX with MCx?
A. 64 KB
B. 8 KB
C. 16 KB
D. 32 KB
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