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QUESTION 36
A customer wants to use the Cinder driver to manage XtremIO storage in an OpenStack environment. What is a potential concern?
A. Compression is not supported
B. Deduplication is not supported
C. Snapshots of snapshots are not supported
D. Volume expansion cannot be reversed
Answer: D
Explanation:
Incorrect:
Not B: OpenStack Cinder features include:
* Clone a volume: With inline deduplication, compression and thin provisioning.
Not C, Not D: EMC XtremIO OpenStack Block Storage driver, supported operations:
* Create, delete, clone, attach, and detach volumes
* Create and delete volume snapshots
* Create a volume from a snapshot
* Copy an image to a volume
* Copy a volume to an image
* Extend a volume
https://docs.openstack.org/juno/config-reference/content/XtremIO-cinder-driver.html
https://www.emc.com/collateral/data-sheet/h13287-ds-xtremio-openstack.pdf
QUESTION 37
When creating XtremIO volumes for a host, which operating systems will benefit by changing the default logical block size for applications consisting of 4 KB I/Os?
A. Microsoft Windows and RHEL
B. VMware ESX and Microsoft Windows
C. RHEL and IBM AIX
D. Sun Solaris and HP-UX
Answer: B
Explanation:
With VMware ESX 5.5, the VMware hypervisor cannot work with LUNs that use a logical block size of 4K. When using VMware, be sure to specify Normal (512 LBs) from your XtremIO array.
https://gruffdba.wordpress.com/2015/08/02/4k-logical-block-size-size-fails-on-vmware/
QUESTION 38
A company is running large databases demanding many copies of production databases on-demand with massive consolidation of dev/test application workloads. They are looking for a solution that addresses their specific needs without high storage costs or a larger storage footprint. Which EMC XtremIO features address their needs?
A. Inline Deduplication and compression
B. High IOPS and ease of use
C. Ease of use and efficiency
D. Low latency and data protection
Answer: A
QUESTION 39
You have been asked to design an XtremIO storage array solution that will be used for two large applications workloads. One overload will generate approximately 150000 write IOPs with an average 4 KB I/O size. The second write workload will have an average I/O size of 128 KB and will generate approximately 2 GB/s of throughput. At a minimum, how many X-Bricks are needed in a single cluster to meet this requirement?
A. 2
B. 4
C. 6
D. 8
Answer: A
Explanation:
Second write workload IOPS = 2 GB/s divided by 128 KB = 2 x 1073741824 / (128 x 1024) = 16384 IOPs. Total IOPs required would be 150000, from the first workload, plus 16384, totaling 166384. 2 X-Brick cluster provides 300K Read/write IOPS so it would be adequate. Storage capacity and performance scale linearly, such that two X-Bricks supply twice the IOPS, four X-Bricks supply four times the IOPS, six X-Bricks supply six times the IOPS and eight X-Bricks supply eight times the IOPS of the single X-Brick configuration.
Note:
Choose an EMC XtremIO system and scale out linearly by adding more XtremIO X-Bricks.
https://store.emc.com/en-us/Product-Family/EMC-XtremIO-Products/EMC-XtremIO-All-Flash-Scale-Out-Array/p/EMC-XtremIO-Flash-Scale-Out
QUESTION 40
How can REST API commands be run to manage and monitor an XtremIO cluster?
A. From the REST API CLI built into each X-Brick
B. From the REST API GUI built into each X-Brick
C. From a third-party GUI
D. From the REST API tab in the XMS GUI
Answer: C
Explanation:
The XtremIO’s RESTful API allows HTTPS-based interface for automation, orchestration, query and provisioning of the system. With the API, third party applications can be used to control and fully administer the array. Normally you would access the API using some form of programming/scripting language, such as Python or Perl. However for the purposes of learning or testing concepts there are a number of tools that work better, such as HTTPRrequester and curl.
https://blog.docbert.org/using-the-xtremio-rest-api-part-1/
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