Oracle SuperCluster T5-8 Owner's Manual page 25

Disk drives – Each Exadata Storage Server contains 12 disk drives, where you can
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choose between disk drives designed for either high capacity or high performance when
you first order Oracle SuperCluster T5-8. Oracle SuperCluster T5-8 software provides
redundancy between the 12 disk drives within each Exadata Storage Server. For more
information, see
ZFS Storage Appliance
Each Oracle SuperCluster T5-8 contains one ZFS storage appliance, in either the Full Rack or
Half Rack version. The ZFS storage appliance consists of the following:
Two ZFS storage controllers
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One Sun Disk Shelf
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Redundancy in the ZFS storage appliance is achieved two ways:
Through connections from the two ZFS storage controllers to the Sun Disk Shelf.
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For more information, see
Connections" on page
Through components within the ZFS storage appliance itself:
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Power supplies – Each ZFS storage controller and Sun Disk Shelf contains two power
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supplies. Each ZFS storage controller and the Sun Disk Shelf can continue to operate
normally if one of those power supplies fails.
Disk drives – Each ZFS storage controller contains two mirrored boot drives, so the
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controller can still boot up and operate normally if one boot drive fails. The Sun Disk
Shelf contains 20 hard disk drives that are used for storage in Oracle SuperCluster
T5-8, and 4 solid-state drives that are used as write-optimized cache devices,
also known as logzillas. Oracle SuperCluster T5-8 software provides redundancy
between the disk drives. For more information, see
Configurations" on page
Sun Datacenter InfiniBand Switch 36 Switches
Each Oracle SuperCluster T5-8 contains three Sun Datacenter InfiniBand Switch 36 switches,
in either the Full Rack or Half Rack version, two of which are leaf switches (the third is used as
a spine switch to connect two racks together). The two leaf switches are connected to each other
to provide redundancy should one of the two leaf switches fail. In addition, each SPARC T5-8
server, Exadata Storage Server, and ZFS storage controller has connections to both leaf switches
to provide redundancy in the InfiniBand connections should one of the two leaf switches fail.
For more information, see
Understanding the Hardware Components and Connections
"Cluster Software for the Database Domain" on page
"Understanding the ZFS Storage Appliance Physical
39.
46.
"Understanding the Physical Connections" on page
85.
"Understanding the Software
26.
Understanding the System 25