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EMC Symmetrix Solutions Expert Exam for Technology Architects Sample Questions:

1. An existing 2-engine VMAX array has 192 x 450GB 15K Fibre Channel drives in a single Virtual Provisioning pool. Two Linux database hosts are connected to the array and both are running PowerPath.
Host oradb01 is connected to the E0 FA ports on each director and is meeting the customer performance SLA. Host oradb02 is connected to the G0 FA ports on each director - and for the past 3 days this host has been experiencing poor performance during peak activity in the afternoons.
What steps do you take to identify likely bottlenecks?

A) Use SMC to check for Virtual Pool alerts, use SPA to measure drive response times
B) Open a case with EMC Support and upload Oracle Statspack information
C) Check the host for queued I/Os, use SPA to examine I/O size and utilization on the G0 FA ports
D) Run iostat -x in order to compare I/O size and read/write ratio of the two hosts

2. A new Symmetrix array is being designed for an Oracle data warehouse. The workload is expected to be primarily reads for batch reporting. The customer wants to maximize usable capacity of the array and follow best practices for RAID types to optimize performance. Which RAID level(s) should be used for the control files, data files, redo logs and archive logs?

A) RAID1 for control and data files, RAID 5 for archive and redo logs
B) RAID5 for archive logs and data files, RAID1 for control files and redo logs
C) RAID1 for all data
D) RAID 5 for data files, RAID 1 for control files, redo logs and archive logs

3. A customer is experiencing heavy memory utilization on an ESXi host that may be causing performance problems. Which VMware memory management technique will allow virtual machines to de-allocate its memory when physical ESXi RAM is insufficient?

A) Memory swapping
B) Memory Ballooning
C) Transparent Page Sharing
D) Memory Compression

4. A data warehouse team is reporting poor performance on their batch reports. The database runs on a Solaris host connected to a DMX-4 array with Fibre Channel drives sized to support a sequential read workload. Which metrics in Performance Manager would be useful in diagnosing the performance issue?

A) Average sampled read time, KBytes read per second, I/O per second, Read hit %
B) I/O per second, KBytes read per second, prefetched tracks per second, Tracks not used per second
C) Read hit %, Tracks not used per second, Average sampled read time, I/O per second
D) KBytes read per second, Prefetched tracks per second, Read %, Write %

5. You have been tasked with gathering performance data for a Microsoft SQL server database that will be migrated to a Symmetrix VMAX. Which Perfmon counter must you measure prior to designing a disk layout?

A) Logical Disk\Avg. Disk Bytes/sec
B) Physical Disk\Avg. Disk sec/Write
C) Physical Disk\Disk Writes/sec
D) Logical Disk\Disk Write Bytes/sec

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