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Glossary
3958 DD1 This is the original server available since
August 2008. This server is based on the IBM System
x3850 M2 Type 7141. When used as a server in the
TS7650G, its machine type and model are 3958 DD1. Use
this machine type and model for service purposes.
3958 DD3 This is a higher performance server available
since March 2009. This server is based on the IBM
System x3850 M2 Type 7233. When used as a server in
the TS7650G, its machine type and model are 3958 DD3.
Use this machine type and model for service purposes.
3958 DD4 This is a newer, higher performance server
available since December 2010. This server is based on
the IBM System x3850 X5 Type 7145-AC1. When used as
a server in the TS7650G, its machine type and model are
3958 DD4. Use this machine type and model for service
purposes.
3958 DD5 This is a newer, higher performance server
available since May 2012. This server is based on the IBM
System x® 7145 model. When used as a server in the
TS7650G, its machine type and model are 3958 DD5. Use
this machine type and model for service purposes.
asynchronously parallel system A system in which the
backed up data does not return to the host (and out to file)
in the same order each time.
Backup, Recovery and Media Services for IBM i
(BRMS) Helps you implement a disciplined approach to
managing your backups, and provides you with an orderly
way to retrieve lost or damaged data. BRMS also enables
you to track all of your backup media from creation to
expiration
BRMS policies A set of defaults that is commonly used
(for example, device or media class). Generally used
defaults are in the BRMS system policy. Backup-related
defaults are in the BRMS backup policy.
chown The chown command (abbreviation for change
owner) is used on UNIX based systems to change the
owner of a file. In most implementations, it can be run by
only the superuser to prevent users simply changing
ownership of files randomly.
compaction (data compaction) The reduction of the
number of data elements, bandwidth, cost, and time for
the generation, transmission, and storage of data without
loss of information by eliminating unnecessary
redundancy.
concurrent saves and restores The ability to save or
restore different objects from a single library or directory
to multiple backup devices or different libraries or
directories to multiple backup devices at the same time
from different jobs.
control group A group of items (for example, libraries or
stream files) to back up, and the attributes associated with
how to back them up.
CSV file (.csv) Comma-separated value file,
sometimes called comma-delimited. This type of file is a
specially formatted plain text file that stores spreadsheet
or basic database-style information in a simple format,
with one record on each line, and each field within that
record separated by a comma. CSV files are used by
ProtecTIER Manager as a simple way to transfer a large
volume of database information between programs. This
type of file can be imported into most spreadsheet
programs
.
deduplication A data compression technique in which
redundant data is eliminated. The technique improves
storage utilization and can also be applied to network data
transferals to reduce the number of bytes that must be
sent across a link
.
direct attachment Refers to a digital storage system
directly attached to a server or workstation, without a
storage network in between.
dirty bit A dirty bit is a flag that indicates whether an
attribute must be updated. This situation usually occurs
when a bit in a memory cache or virtual memory is
changed by a processor but is not updated in storage.
dirty bit technology The ProtecTIER system uses a
“dirty-bit” feature/technology and cartridges are marked
as in-sync after the data finishes replicating from the
primary to the secondary site, so that at the time of
synchronization, the local cartridges and their DR site
replicas are identical
.
disaster recovery (DR) The process of recovering
production site data in a DR location. Disaster recovery is
useful if a disaster occurs or a situation occurs where the
production (or primary) site goes offline.
disk controller The disk controller for the TS7650
Appliance is IBM Feature Code 3708: 4.8 TB Fibre
Channel Disk Controller. Use this feature code for service
purposes.

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