Hitachi TAGMASTORE MK-90RD011-25 - Manual (Page 63)

Hitachi Command Control Interface (CCI) User and Reference Guide 45
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 Device
RD/WR command
Command
HORCM
HORCM_CONF
Server machine
Remote communication
Communicates with the HORCM (CCI) in the remote server.
Command
Command
Figure 2.20 HORCM Operational Environment