Databases Reference
In-Depth Information
■
recipe 9-8 discusses the topic of interleaved grid disks, which is a feature created to enable the exadata dMa
to divide the cell disks into smaller sections of storage and spread the grid disks extents across a wider range of disk
boundaries. please refer to this recipe for additional information.
Note
3-3. Mapping Flash Disks to Smart Flash Storage
Problem
As an Exadata DMA, you wish to map the physical PCI Flash disk storage to Exadata's Smart Flash Cache and Smart
Flash Logging storage entities to better understand how the flash cards are used in the Exadata storage cells.
Solution
In Recipe 1-6, we presented information about how the storage server's PCI flash cards were partitioned and
presented as flash storage in your Exadata Storage Servers. In this recipe, we will show you how to map this flash
storage to Exadata's usable flash storage, which is used for Smart Flash Cache and Smart Flash Logging.
First, log in to an Exadata storage cell as
root
or
celladmin
, launch
cellcli
, and run the following commands:
CellCLI> list flashcache detail
name: cm01cel01_FLASHCACHE
cellDisk: FD_06_cm01cel01,FD_01_cm01cel01,FD_08_cm01cel01,
FD_04_cm01cel01,FD_03_cm01cel01,FD_02_cm01cel01,FD_11_cm01cel01,FD_00_cm01cel01,FD_09_cm01cel01,
FD_12_cm01cel01,FD_07_cm01cel01,FD_13_cm01cel01,FD_15_cm01cel01,FD_05_cm01cel01,FD_14_cm01cel01,
FD_10_cm01cel01
creationTime:
2012-05-26T21:48:38-04:00
degradedCelldisks:
effectiveCacheSize:
364.75G
id:
9b17f359-a600-4e86-be86-8c6ef0490f73
size:
364.75G
status:
normal
CellCLI> list flashlog detail
name: cm01cel01_FLASHLOG
cellDisk: FD_13_cm01cel01,FD_08_cm01cel01,FD_06_cm01cel01,
FD_04_cm01cel01,FD_09_cm01cel01,FD_07_cm01cel01,FD_14_cm01cel01,FD_00_cm01cel01,FD_12_cm01cel01,
FD_02_cm01cel01,FD_11_cm01cel01,FD_05_cm01cel01,FD_03_cm01cel01,FD_15_cm01cel01,
FD_01_cm01cel01,FD_10_cm01cel01
creationTime:
2012-05-26T21:58:42-04:00
degradedCelldisks:
effectiveSize:
512M
efficiency:
100.0
id:
13a6c2d0-093a-41c1-a0ad-e8117071b771
size:
512M
status:
normal
CellCLI>
The output shows that each of the 16 flash modules is presented as a flash disk for both Smart Flash Cache and
Smart Flash Logging.
Search WWH ::
Custom Search