How does Oracle Storage Cloud Software Appliance – Cloud Distribution work?
A.
It copies data from specified storage volumes in Oracle Compute Cloud Service to Oracle Storage Cloud Service on demand.
B.
It stores all data in storage volumes attached to the Oracle Compute Cloud Service VM that hosts the application and uploads only infrequently accessed data to Oracle Storage Cloud Service.
C.
It caches data written by applications in storage volumes attached to the Oracle Compute Cloud Service virtual machine (VM) that hosts the appliance and copies all the data asynchronously to Oracle Storage Cloud Service.
D.
It uploads data to Oracle Storage Cloud Service according to the synchronization schedule defined by the user.
E.
It immediately writes data to containers in Oracle Storage Cloud Service as soon as applications write files to the appliance.
C
E
Changed my mind: C is right
C
The answer correct is B, here information.
http://docs.oracle.com/en/cloud/iaas/storage-appliance-cloud/sfsug/oracle-storage-cloud-software-appliance-cloud-distribution.html
How does the appliance work?
You provision Oracle Storage Cloud Software Appliance – Cloud Distribution on one of your Oracle Compute Cloud Service instances and configure filesystems, each of which maps to a container in Oracle Storage Cloud Service. You then mount these filesystems, using the NFS v4 protocol, on the client Oracle Compute Cloud Service instances that you want to provide shared file storage for. Currently, the appliance is supported for Oracle Linux instances of Oracle Compute Cloud Service.
When applications running on the client instances write data to the mount points on the instance, the data is cached on the appliance instance and then uploaded asynchronously to Oracle Storage Cloud Service. Frequently accessed data is cached on the appliance. You can configure the appliance cache size.
Your applications enjoy read and write performance that’s comparable to the performance when using network-attached storage (NAS). And you get the benefits of low cost, infinite scale, and reliability of Oracle Storage Cloud Service.
The following figure shows two Oracle Compute Cloud Service instances sharing access over NFS to data stored in Oracle Storage Cloud Service: