A customer needs to balance storage high availability and cost to meet various service level
agreements, depending on the application requirement. Which storage methodology should the
customer use?
A.
storage RAID
B.
storage federation
C.
storage tiering
D.
deduplicated storage
Explanation:
Tiered storage is the assignment of different categories of data to different types of storage media in
order to reduce total storage cost. Categories may be based on levels of protection needed,
performance requirements, frequency of use, and other considerations. Since assigning data to
particular media may be an ongoing and complex activity, some vendors provide software for
automatically managing the process based on a company-defined policy.
As an example of tiered storage, tier 1 data (such as mission-critical, recently accessed, or top secret
files) might be stored on expensive and high-quality media such as double-parity RAIDs (redundant
arrays of independent disks). Tier 2 data (such as financial, seldom-used, or classified files) might be
stored on less expensive media in conventional storage area networks (SANs). As the tier number
increased, cheaper media could be used. Thus, tier 3 in a 3-tier system might contain event-driven,
rarely used, or unclassified files on recordable compact discs (CD-Rs) or tapes.
Incorrect:Not:
Much like vMotion in VMware environments, storage federation goes beyond the capabilities of
storage virtualization. Storage federation from HP enables the online non-disruptive movement of
storage volumes between arrays in a metro area. Unlike external storage virtualization appliances
that add cost, complexity and downtime, storage federation from HP creates a persistent pool of
capacity using native communication between system controllers.