1Z0-027 · Question #35
Which four statements are true about Exadata Smart Flash Cache?
The correct answer is B. Flash based ASM diskgroups may share space with the Flash Cache on the flashdisks. C. Single block reads can benefit from Smart Flash Cache. E. Multiblock reads can benefit from Smart Flash Cache. F. Smart Flash Logs reduce the size of Smart Flash Cache. B: * Grid disks (the logical disks that reside on physical cell disks) are created on these flash- based cell disks and the grid disks are assigned to an Automatic Storage Management (ASM) diskgroup. The best practice would be to reserve the same amount of flash on each Exadata…
Question
Which four statements are true about Exadata Smart Flash Cache?
Options
- ASmart Scan will always be done for I/Os to flash based griddisks.
- BFlash based ASM diskgroups may share space with the Flash Cache on the flashdisks.
- CSingle block reads can benefit from Smart Flash Cache.
- DSmart Scan will never be done for I/Os to flash based griddisks.
- EMultiblock reads can benefit from Smart Flash Cache.
- FSmart Flash Logs reduce the size of Smart Flash Cache.
How the community answered
(29 responses)- A17% (5)
- B76% (22)
- D7% (2)
Explanation
B: * Grid disks (the logical disks that reside on physical cell disks) are created on these flash- based cell disks and the grid disks are assigned to an Automatic Storage Management (ASM) diskgroup. The best practice would be to reserve the same amount of flash on each Exadata cell for flash disks and have the ASM diskgroup spread evenly across the Exadata cells in the configuration just as you would do for regular Exadata grid disks. This will evenly distribute the flash I/O load across the Exadata cells and flash. Storage Server comes with a substantial amount of flash storage. A small amount is allocated for database logging and the remainder will be used for caching user
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