Oracle Exadata

Oracle Exadata

Storage Cells

Disk Architecture in Exadata

• / is the root file system.

• /opt/oracle is where the Exadata software is installed.

• /var/log/oracle is where the cells’ OS and crash logs are stored.

• The /dev/md5 and /dev/md6 are the system partitions, active and mirror copy.

• The /dev/md7 and /dev/md8 are the Exadata software installation, active and mirror copy.

• The /dev/md11 is mapped with /var/log/oracle.

At any given point in time, only four multidevice (MD) mount points can be mounted on the cell.

Approximately 29GB of space per disk is used for this purpose.

Administer all storage cells via DCLI

dcli -g ./cell_group -l os_username -e list cell

Please note:

• dcli logs into celadmin by default
• cel_group is a txt based list Exadata storage cells

Exadata Cell Admin

Show current image:

# imageinfo

# imagehistory

List physical disk storage details

# lssci -v

Physical disk are controlled by LSI MegaRaid, to get more information:

# /opt/MegaRAID/MedgaCli/MegaCli64 -ShowSummary -aALL

CELLCLI

CellCLI> list physicaldisk where disktype=HardDisk attributes name,phyicalSize