An administrator needs to configure vFlash Read Cache to improve performance.
What would benefit the most from enabling vFlash Read Cache?
A.
Virtual machines replicated with vSphere Replication
B.
Web Server virtual machines
C.
Database virtual machines
D.
Virtual machines migrated using Storage vMotion
Explanation:
Most of the material discussing the performance improvements of vFlash Read Cache do so using Database Servers such as Oracle and MS SQL due to the amount of data they try to drag off of disk and their sensitivity to latency. Would think the answer is therefore C.
http://www.vmware.com/files/pdf/techpaper/vfrc-perf-vsphere55.pdf
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Correct answer are “B”.
In databases generally unique data which permanently change. In turn on a web servers of a page don’t change so often as all variables are stored in databases. Therefore the web the server needs a cache more.
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This one is stumping me as it could be web or database as it depends on the environment. Would like to see more discussion here
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B.
Examples of applications which can benefit from Flash Read Cache are Oracle, Exchange Server and SQL Server, IBM DB2 and SharePoint.
http://up2v.nl/2013/08/26/introduction-of-vmware-vsphere-flash-read-cache/
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Sorry, I meant C is correct…
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I would still prefer answer B
Refer page no 7 on http://www.vmware.com/files/pdf/vSphere_55_Flash_Read_Cache_Whats_New_WP.pdf
For the most part, workloads with read-intensive operations and high percentages of data locality requirements are good candidates for vSphere Flash Read Cache. A majority of the targeted candidates are categorized through database warehousing and enterprise server workloads such as Web proxy servers, monitoring servers
and many others.
scapas do you agree ?
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It’s B, because DB servers are mostly write intensive. vSphere Flash Read Cache ONLY supports acceleration on the reads. Web Servers make the most sense, since they are I/O is almost entirely read operations.
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Yep. correct answer should be B. vFlash read cache would most benefit read-intensive applications like web servers. of course, DBs would get the benefits too but not as much.
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