CELL Create hdd fileformat

Fiche express
Type	Procédure pas à pas
Contexte	Création des disques d'une cellule Exadata (simulateur)
Voir aussi	Virtu cell · Cellcli · Archi exadata

Cette page détaille la création des disques d'une cellule de stockage Exadata avec cellcli, depuis les fichiers bruts (raw) jusqu'aux Grid Disks exploitables par ASM. Elle complète Virtu cell (construction d'une cellule en environnement de simulation), où les disques physiques n'existent pas et sont remplacés par des fichiers créés localement avec dd.

Création des fichiers disques (simulateur)

En l'absence de disques physiques (environnement de simulation/laboratoire), on crée des fichiers de taille fixe qui joueront le rôle de LUN : douze fichiers pour les disques durs et quatre pour les disques flash.

$ vi dd.sh

dd if=/dev/zero of=disk01 bs=1M count=1000
dd if=/dev/zero of=disk02 bs=1M count=1000
dd if=/dev/zero of=disk03 bs=1M count=1000
dd if=/dev/zero of=disk04 bs=1M count=1000
dd if=/dev/zero of=disk05 bs=1M count=1000
dd if=/dev/zero of=disk06 bs=1M count=1000
dd if=/dev/zero of=disk07 bs=1M count=1000
dd if=/dev/zero of=disk08 bs=1M count=1000
dd if=/dev/zero of=disk09 bs=1M count=1000
dd if=/dev/zero of=disk10 bs=1M count=1000
dd if=/dev/zero of=disk11 bs=1M count=1000
dd if=/dev/zero of=disk12 bs=1M count=1000
dd if=/dev/zero of=FLASH01 bs=1M count=1000
dd if=/dev/zero of=FLASH02 bs=1M count=1000
dd if=/dev/zero of=FLASH03 bs=1M count=1000
dd if=/dev/zero of=FLASH04 bs=1M count=1000

$ chmod +x dd.sh
$ ./dd.sh
$ chmod 660 *
$ rm -f ./dd.sh

Création des Cell Disks

CellCLI> create celldisk all

CellDisk FD_00_cell1 successfully created
CellDisk FD_01_cell1 successfully created
CellDisk FD_02_cell1 successfully created
CellDisk FD_03_cell1 successfully created
CellDisk CD_disk01_cell1 successfully created
CellDisk CD_disk02_cell1 successfully created
CellDisk CD_disk03_cell1 successfully created
CellDisk CD_disk04_cell1 successfully created
CellDisk CD_disk05_cell1 successfully created
CellDisk CD_disk06_cell1 successfully created
CellDisk CD_disk07_cell1 successfully created
CellDisk CD_disk08_cell1 successfully created
CellDisk CD_disk09_cell1 successfully created
CellDisk CD_disk10_cell1 successfully created
CellDisk CD_disk11_cell1 successfully created
CellDisk CD_disk12_cell1 successfully created

Les fichiers FLASH0* deviennent des Cell Disks préfixés FD_ (flash), les fichiers disk* deviennent des Cell Disks préfixés CD_ (hard disk).

Flash cache et flash log

CellCLI> create flashcache all size=2G

Flash cache cell1_FLASHCACHE successfully created

CellCLI> create flashlog all

Flash log cell1_FLASHLOG successfully created

Création des Grid Disks

CellCLI> create griddisk all harddisk prefix=data

GridDisk data_CD_disk01_cell1 successfully created
GridDisk data_CD_disk02_cell1 successfully created
GridDisk data_CD_disk03_cell1 successfully created
GridDisk data_CD_disk04_cell1 successfully created
GridDisk data_CD_disk05_cell1 successfully created
GridDisk data_CD_disk06_cell1 successfully created
GridDisk data_CD_disk07_cell1 successfully created
GridDisk data_CD_disk08_cell1 successfully created
GridDisk data_CD_disk09_cell1 successfully created
GridDisk data_CD_disk10_cell1 successfully created
GridDisk data_CD_disk11_cell1 successfully created
GridDisk data_CD_disk12_cell1 successfully created

Ce sont ces Grid Disks (préfixe data_) qui seront ensuite présentés à ASM comme disques candidats pour un diskgroup, côté nœud de calcul.

Vérification

CellCLI> list flashcache detail

name:              	cell1_FLASHCACHE
cellDisk:          	FD_00_cell1,FD_03_cell1,FD_02_cell1,FD_01_cell1
creationTime:      	2013-05-16T17:11:57+08:00
degradedCelldisks:
effectiveCacheSize:	2G
id:                	33020341-ba55-4b35-9b3a-4030b5085475
size:              	2G
status:            	normal

CellCLI> list flashlog detail

name:              	cell1_FLASHLOG
cellDisk:          	FD_01_cell1,FD_03_cell1,FD_02_cell1,FD_00_cell1
creationTime:      	2013-05-16T17:12:10+08:00
degradedCelldisks:
effectiveSize:     	512M
efficiency:        	100.0
id:                	f10e1ac7-5e3f-4c1e-8f3b-8e9ab19fffeb
size:              	512M
status:            	normal

CellCLI> list cell

cell1	online

CellCLI> list celldisk

CD_disk01_cell1	normal
CD_disk02_cell1	normal
CD_disk03_cell1	normal
CD_disk04_cell1	normal
CD_disk05_cell1	normal
CD_disk06_cell1	normal
CD_disk07_cell1	normal
CD_disk08_cell1	normal
CD_disk09_cell1	normal
CD_disk10_cell1	normal
CD_disk11_cell1	normal
CD_disk12_cell1	normal
FD_00_cell1    	normal
FD_01_cell1    	normal
FD_02_cell1    	normal
FD_03_cell1    	normal

CellCLI> list griddisk

data_CD_disk01_cell1	active
data_CD_disk02_cell1	active
data_CD_disk03_cell1	active
data_CD_disk04_cell1	active
data_CD_disk05_cell1	active
data_CD_disk06_cell1	active
data_CD_disk07_cell1	active
data_CD_disk08_cell1	active
data_CD_disk09_cell1	active
data_CD_disk10_cell1	active
data_CD_disk11_cell1	active
data_CD_disk12_cell1	active

Détail d'un Cell Disk hard disk et d'un Cell Disk flash :

CellCLI> list celldisk CD_disk01_cell1 detail

name:              	CD_disk01_cell1
comment:
creationTime:      	2013-05-16T16:40:29+08:00
deviceName:        	/opt/oracle/cell11.2.3.2.1_LINUX.X64_130109/disks/raw/disk01
devicePartition:   	/opt/oracle/cell11.2.3.2.1_LINUX.X64_130109/disks/raw/disk01
diskType:          	HardDisk
errorCount:        	0
freeSpace:         	0
id:                	ecc913eb-5f74-4ad6-9d05-f811af986921
interleaving:      	none
lun:               	/opt/oracle/cell11.2.3.2.1_LINUX.X64_130109/disks/raw/disk01
physicalDisk:      	/opt/oracle/cell11.2.3.2.1_LINUX.X64_130109/disks/raw/disk01
raidLevel:         	"RAID 0"
size:              	992M
status:            	normal

CellCLI> list celldisk FD_00_cell1 detail

name:              	FD_00_cell1
comment:
creationTime:      	2013-05-16T16:40:25+08:00
deviceName:        	/opt/oracle/cell11.2.3.2.1_LINUX.X64_130109/disks/raw/FLASH01
devicePartition:   	/opt/oracle/cell11.2.3.2.1_LINUX.X64_130109/disks/raw/FLASH01
diskType:          	FlashDisk
errorCount:        	0
freeSpace:         	304M
freeSpaceMap:      	offset=688M,size=304M
id:                	c9488ae4-d3b9-4aa2-a4e5-d3539e44b417
interleaving:      	none
lun:               	/opt/oracle/cell11.2.3.2.1_LINUX.X64_130109/disks/raw/FLASH01
physicalDisk:      	/opt/oracle/cell11.2.3.2.1_LINUX.X64_130109/disks/raw/FLASH01
raidLevel:         	"RAID 0"
size:              	992M
status:            	normal

CellCLI> list griddisk data_CD_disk01_cell1 detail

name:              	data_CD_disk01_cell1
availableTo:
cachingPolicy:     	default
cellDisk:          	CD_disk01_cell1
comment:
creationTime:      	2013-05-16T16:49:51+08:00
diskType:          	HardDisk
errorCount:        	0
id:                	7a36bc8a-1611-474d-85fc-fa730e73176d
offset:            	48M
size:              	944M
status:            	active

Voir aussi

• Virtu cell — installation complète d'une cellule Exadata en simulateur
• Cellcli — référence des commandes cellcli
• Virtu DB noeud — présentation des Grid Disks côté nœud de calcul (ASM)