A customer with an existing VNX for File implementation wants to enable deduplication on a file system, based on the following specifications:
Idle File System
Number of files: 1 M
Average file size: 50 KiB
Estimated deduplication: 30%
What is the estimated time for initial deduplication?
A. 5 min
B. 10 min
C. 15 min
D. 20 min
A clone source LUN is 512 GiB in size. It performs 500 random 8 KiB 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 GiB) is read from the source LUN as part of the resynchronization process?
A. 5 GiB
B. 9 GiB
C. 18 GiB
D. 36 GiB
A customer has recently implemented Microsoft Exchange 2010 on a VNX storage system that hosts a variety of application servers. The Exchange implementation is currently using RAID 5 (4+1) and uses FAST Cache for the database volumes, but is not using FAST VP. Performance has been significantly diminished.
What would you recommend to the customer?
A. Isolate server workload to dedicated set of spindles.
B. Implement FAST VP.
C. Combine log and database volumes in a storage pool.
D. Implement a RAID 6 configuration.
As a result of suffering a catastrophic failure, your customer has requested a DR solution. The solution must introduce a higher level of availability for their Exchange 2010 system. The customer wants a strategy that involves Replication Manager and DAG with third-party replication enabled.
In what state(s) of the database would the replication occur?
A. Active only
B. Either active or passive
C. Passive only
D. Neither active nor passive
An application generates 500 random 8 KiB IOPS with a R/W ratio of 3:1. An asynchronous mirror is started on the application LUN. The update cycle is configured to be 30 minutes, and updates take 15 minutes to complete. Assume that the data rate is constant.
What is the minimum space that should be configured for the Reserved LUN Pool on the secondary VNX?
A. 879 MiB
B. 7,032 MiB
C. 14,064 MiB
D. 16,250 MiB
A customer has deployed a new application on a host using VNX storage. The new application I/O size is 512 KiB, has a 50/50 read-write ratio, and its write behavior is sequential and bursty. All other host applications are characterized by 4 KiB I/O random writes.
The customer has noticed degraded overall VNX performance during write bursts, which is caused by the new application. Your analysis reveals a high rate of forced flushing, as well as significant CMI congestion.
What can you recommend to improve overall VNX performance?
A. Decrease the write-aside value
B. Disable write back cache
C. Increase the read cache area
D. Enable mirror cache
A customer has a VNX system to provide storage for a VMware 4.1 Cluster with four ESX hosts. The ESX hosts are running Exchange servers and other application servers. The customer is using a virtual machine as a Replication Manager. A VMware proxy host is used to get crash- consistent replicas for the Exchange mail stores.
Which volume access type is recommended for the Exchange servers?
A. VMFS for the boot volumes; RDM in physical mode for the mail store volumes
B. VMFS for the boot volumes; RDM in virtual mode for the mail store volumes
C. VMFS for boot; mail store volumes in EagerZeroedThick mode
D. VMFS for boot; mail store volumes in LazyZeroedThick mode
You have designed an Auto-tiering solution using Flash, SAS, and NL-SAS disks in your storage pool. Your design was implemented and scheduling has been running daily. The customer reports that there is no data in the Flash drive tier. Why is this the case?
A. Tiering is set up for Lowest Available Tier
B. Scheduling is not required for this configuration
C. Data was previously moved to another tier
D. There was no data in the Flash drives to start with
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?
A. Balance application I/O
B. Physically balance port I/O
C. Logically balance port I/O
D. Balance switch I/O
A customer has a mix of Windows 2003 and Windows 2008 virtualized guests deployed in their vSphere v4 environment. They have purchased a new VNX array and are also upgrading their ESX servers from V4.0 to V5.0.
Their VMware administrators are creating the new target LUNs and VMFS file systems for their datastores. They have noticed that the alignment offset on the new array is not the same as their old array, so they are concerned about disk
crossing on the new array.
How would you respond to the customer?
A. The offset for VMFS-5 is now 1 MiB and will not affect performance of any of the VMs.
B. The offset for VMFS-5 is still 64 KiB and will not affect performance of any of the VMs.
C. All VMs will need to be manually adjusted.
D. Windows 2003 VMs will need to be manually adjusted; Windows 2008 VMs will not be affected.
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