Dell Acceleration Appliances for Databases User Manual download pdf (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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Dell Acceleration Appliances for Databases User Manual Page 78