Dell Acceleration Appliances for Databases - Manual (Page 78)

Glossary of Terms
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Host – Generally refers to an independent machine that may or may not contain ioMemory
devices.
Initiator – An initiator of I/O is analogous to a client in a client/server system. Initiators use a SCSI
transport protocol to access block storage over a network. A database or mail server is an
initiator, for example.
IQN – iSCSI Qualified Name for a port, consisting of “IQN”, the date in YYYY-MM format, the
reversed domain name (such as “org.acme”), and an optional storage target name.
LUN – Logical Unit Number. A LUN is usually synonymous with a virtual volume or physical disk
drive. In ION Accelerator, a LUN is an exported path of an ION volume, between the ION target
port and the client initiator port. One ION Accelerator volume can have multiple LUNs.
Port – A physical location on a piece of hardware in a slot. For example, a target port may be
referenced as slot 1, port 1.
Storage Pool – An aggregation of IoMemory or RAID block devices. Block devices can be added
to a pool. Pools are created by a storage profile, and they may reside on an ION host or HA
cluster. For HA, storage pools are created on both nodes of a cluster but are referenced on only
one of the HA nodes.
Storage Profile – A pre-determined group of settings that the user selects when creating a
storage pool. The storage profile is an attribute of the storage pool.
Target – The opposite of an initiator. It is a receiver of I/O operations, analogous to a server in a
client/server system. The target for I/O is the provider of (network) storage - a SAN disk array is a
traditional target. ION Accelerator is an all-flash storage target by comparison.
Volume – A logical construct identifying a unit of data storage. A volume is allocated to allow for
expandability within the space constraints of a pool. For ION Accelerator, a volume is not
necessarily directly linked to a physical device.
WWPN – World-Wide Port Number; an ID that uniquely identifies a Fibre Channel port.
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