HP XP P9000 Continuous Access Synchronous User Guide

IMPL initial microprogram load
in-system
replication
The original data volume and its copy are located in the same storage system. Business Copy
in-system replication provides duplication of logical volumes; Snapshot in-system replication
provides “snapshots” of logical volumes that are stored and managed as virtual volumes (V-VOLs).
See also remote replication.
initial copy An initial copy operation is performed when a copy pair is created. Data on the primary volume
is copied to the secondary volume.
initiator port A fibre-channel port configured to send remote I/Os to an RCU target port on another storage
system. See also RCU target port and target port.
intermediate site
(I-site)
A site that functions as both a Continuous Access Synchronous secondary site and a Continuous
Access Journal primary site in a 3-data-center (3DC) cascading configuration.
internal volume A logical volume whose data resides on drives that are physically located within the storage
system. See also external volume.
IO, I/O input/output
IOPS I/Os per second
IP internet protocol
IPL initial program load
JNL journal
JNLG journal group
journal group
(JNLG)
In a Continuous Access Journal system, journal groups manage data consistency between multiple
primary volumes and secondary volumes. See also consistency group (CTG).
journal volume A volume that records and stores a log of all events that take place in another volume. In the
event of a system crash, the journal volume logs are used to restore lost data and maintain data
integrity.
In Continuous Access Journal, differential data is held in journal volumes on until it is copied to
the S-VOL.
JRE Java Runtime Environment
L1 pair See layer-1 (L1) pair.
L2 pair See layer-2 (L2) pair.
LAN local-area network
layer-1 (L1) pair In a Business Copy cascade configuration, a layer-1 pair consists of a primary volume and
secondary volume in the first cascade layer. An L1 primary volume can be paired with up to
three L1 secondary volumes. See also cascade configuration.
layer-2 (L2) pair In a Business Copy cascade configuration, a layer-2 (L2) pair consists of a primary volume and
secondary volume in the second cascade layer. An L2 primary volume can be paired with up to
two L2 secondary volumes. See also cascade configuration.
LBA logical block address
LCP local control port; link control processor
LCU logical control unit
LDEV logical device
LDKC See logical disk controller (LDKC).
leaf volume A level-2 secondary volume in a Business Copy cascade configuration. The primary volume of a
layer-2 pair is called a node volume. See also cascade configuration.
LED light-emitting diode
license key A specific set of characters that unlocks an application and allows it to be used.
local copy See in-system replication.
local site See primary site.
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