Huawei OceanStor Dorado V3 Series Parts Replacement page 217

OceanStor Dorado V3 Series
Parts Replacement
Copying
D
Data compression
Data flow
Data migration
Data source
Deduplication
Dirty data
Disaster recovery
Issue 05 (2019-01-30)
A pair state. The state indicates that the source LUN data is
being synchronized to the target LUN.
The process of encoding data to reduce its size. Lossy
compression (i.e., compression using a technique in which a
portion of the original information is lost) is acceptable for
some forms of data (e.g., digital images) in some
applications, but for most IT applications, lossless
compression (i.e., compression using a technique that
preserves the entire content of the original data, and from
which the original data can be reconstructed exactly) is
required.
A process that involves processing data extracted from the
source system. These processes include: filtering,
integration, calculation, and summary, finding and solving
data inconsistency, and deleting invalid data so that the
processed data meets the requirements of the destination
system for the input data.
A movement of data or information between information
systems, formats, or media. Migration is performed for
reasons such as possible decay of storage media, obsolete
hardware or software (including obsolete data formats),
changing performance requirements, the need for cost
efficiencies etc.
A system, database (database user; database instance), or
file that can make BOs persistent.
The replacement of multiple copies of data — at variable
levels of granularity — with references to a shared copy in
order to save storage space and/or bandwidth.
Data that is stored temporarily on the cache and has not been
written onto disks.
The recovery of data, access to data and associated
processing through a comprehensive process of setting up a
redundant site (equipment and work space) with recovery of
operational data to continue business operations after a loss
of use of all or part of a data center. This involves not only
an essential set of data but also an essential set of all the
hardware and software to continue processing of that data
and business. Any disaster recovery may involve some
amount of down time.
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