Table of Contents
command line interface (CLI)
A method of interacting with an operating system or software using a
command line interpreter. With Hitachi's Storage Navigator Modular
Command Line Interface, CLI is used to interact with and manage
Hitachi storage and replication systems.
concurrency of S-VOL
Occurs when an S-VOL is synchronized by simultaneously updating an
S-VOL with P-VOL data AND data cached in the primary host memory.
Discrepancies in S-VOL data may occur if data is cached in the primary
host memory between two write operations. This data, which is not
available on the P-VOL, is not reflected on to the S-VOL. To ensure
concurrency of the S-VOL, cached data is written onto the P-VOL before
subsequent remote copy operations take place.
concurrent copy
A management solution that creates data dumps, or copies, while other
applications are updating that data. This allows end-user processing to
continue. Concurrent copy allows you to update the data in the files
being copied, however, the copy or dump of the data it secures does
not contain any of the intervening updates.
configuration definition file
The configuration definition file describes the system configuration for
making CCI operational in a TrueCopy Extended Distance Software
environment. The configuration definition file is a text file created and/
or edited using any standard text editor, and can be defined from the
PC where the CCI software is installed. The configuration definition file
describes configuration of new TrueCopy Extended Distance pairs on
the primary or remote storage system.
consistency group (CTG)
A group of two or more logical units in a file system or a logical volume.
When a file system or a logical volume which stores application data, is
configured from two or more logical units, these multiple logical units
are managed as a consistency group (CTG) and treated as a single
entity. A set of volume pairs can also be managed and operated as a
consistency group.
consistency of S-VOL
A state in which a reliable copy of S-VOL data from a previous update
cycle is available at all times on the remote storage system A consistent
copy of S-VOL data is internally pre-determined during each update
cycle and maintained in the remote data pool. When remote takeover
operations are performed, this reliable copy is restored to the S-VOL,
eliminating any data discrepancies. Data consistency at the remote site
enables quicker restart of operations upon disaster recovery.
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Table of Contents
Troubleshooting
