Which two capabilities are available when ZFS Storage Appliances are clustered?
A.
Allows load balancing among multiple heads
B.
Allows a peer appliance to provide service while repair is performed
C.
Provides clients with a unified file system namespace across multiple appliances
D.
Allows rolling upgrade of software
Explanation:
As an alternative to incurring hours or days of downtime while the head is repaired, clustering allows a peer appliance to provide service while repair or replacement is performed. In addition, clusters support rolling upgrade of software, which can reduce the business disruption associated with migrating to newer software.
Some clustering technologies have certain additional capabilities beyond availability enhancement; the Oracle
ZFS Storage Appliance clustering subsystem was not designed to provide these. In particular, it does not provide for load balancing among multiple heads, improve availability in the face of storage failure, offer clients a unified filesystem namespace across multiple appliances, or divide service responsibility across a wide geographic area for disaster recovery purposes. These functions are likewise outside the scope of this document; however, the Oracle ZFS Storage Appliance and the data protocols it offers support numerous other features and strategies that can improve availability
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