Cci Software Structure; Horcm Operational Environment; Figure 2.20 Horcm Operational Environment - Hitachi TAGMASTORE MK-90RD011-25 User Manual

2.8

CCI Software Structure

Figure 2.20 illustrates the CCI software structure: the CCI components on the RAID storage
system, and the CCI instance on the UNIX/PC server. The CCI components on the storage
system include the command device(s) and the Hitachi TrueCopy and/or ShadowImage
volumes. Each CCI instance on a UNIX/PC server includes:
HORC Manager (HORCM):
Log and trace files
–
A command server
–
Error monitoring and event reporting files
–
A configuration management feature
–
Configuration definition file (defined by the user)
The Hitachi TrueCopy and/or ShadowImage user execution environments, which contain
the TrueCopy/ShadowImage commands, a command log, and a monitoring function.
2.8.1

HORCM Operational Environment

The HORCM operates as a daemon process on the host server and is activated automatically
when the server machine starts up or manually by the start-up script. HORCM refers to the
definitions in the configuration file when it is activated. The environmental variable
HORCM_CONF is used to define the configuration file to be referenced.
Command
Command
Command

Figure 2.20 HORCM Operational Environment

HORCM_CONF
HORCM
Server machine
Remote communication
Communicates with the HORCM (CCI) in the remote server.
Hitachi Command Control Interface (CCI) User and Reference Guide
RD/WR command
Command Device
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