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Download DemoVendor: EMC
Certifications: Technology Architect
Exam Code: E20-526
Exam Name: XtremIO Solutions and Design Specialist Exam for Technology Architects
Updated: Mar 25, 2024
Q&As: 67
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Which multipathing software is supported by XtremIO?
A. PowerPath/VE and NMP on ESXi hosts
B. MPIO on non-clustered Microsoft Windows hosts only
C. PowerPath/VE on Microsoft Windows VMs hosted by ESXi
D. Native MPIO on IBM AIX clusters
Correct Answer: A
Noting the inefficiencies in VMware's NMP driver, EMC developed a set of drivers specifically designed to overcome these limitations and improve the performance and reliability of the data passing between an array and a server. EMC developed the PowerPath family of products optimized specifically for Linux, Microsoft Windows, and UNIX Operating Systems as well as PowerPath/VE for VMware vSphere and Microsoft Hyper-V hypervisors.
PowerPath is installed on hosts to provide path failover, load balancing and performance optimization VPLEX engines (or directly to the XtremIO array if VPLEX is not used).
Note: VMware, with the cooperation of its storage partners, developed a Native Multipathing Plug-in (NMP). VMware NMP was designed to distribute the load over all the available paths and provide failover protection in the case of path, port or HBA failure, but it has not been fully optimized to work with the controllers in a storage systems. VMware's NMP Round Robin policy does not have the intelligence that PowerPath has as PowerPath uses testing and diagnostics to continually monitor an environment to determine the optimal path for queuing requests and will adapt to current conditions.
References: https://www.emc.com/collateral/analyst-reports/emc-taneja-group-powerpath-tb.pdf
A storage administrator has 20 TB of storage provisioned to their ESXi cluster from a 10 TB XtremIO storage array. The administrator is concerned about running out of physical capacity on the XtremIO.
Which recommendation will assist the administrator?
A. Enable VAAI TPSTUN
B. Increase the compression ratio on the XtremIO
C. Disable VAAI XCOPY D. Thick provisioned eager zero all VM virtual disks
Correct Answer: A
TPSTUN is a VAAI primitive that enables the array to notify vSphere when a LUN is running out of space due to thin provisioning over-commit. The command causes suspending all virtual machines on that LUN. XtremIO supports this VAAI primitive.
Incorrect Answers:
C: The XtremIO features for VAAI support include:
Clone Blocks/Full Copy/XCOPY
Used for copying or migrating data within the same physical array (VMware term:
HardwareAcceleratedMove).
On XtremIO, this allows VM cloning to take place almost instantaneously, without affecting user I/O on
active VMs.
D: The XtremIO features for VAAI support include: Zero Blocks/Write Same
Used for zeroing-out disk regions (VMware term: HardwareAcceleratedInit).
This feature provides accelerated volume formatting.
References: https://itzikr.wordpress.com/2015/12/16/host-configuration-for-vmware-vsphere-on-emcxtremio/
What is the maximum speed of the Fibre Channel ports on an XtremIO storage controller?
A. 2 Gb/s
B. 4 Gb/s
C. 8 Gb/s
D. 16 Gb/s
Correct Answer: C
Each Storage Controller includes two 8Gb/s Fibre Channel (FC) ports.
References: Introduction to the EMC XtremIO STORAGE ARRAY (April 2015), page 8
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