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Glossary
WINS server A system running
Windows Internet Name Service
software that resolves Windows
networking computer names to IP
addresses. Data Protector can back up
WINS server data as part of the
Windows configuration.
writer
(MS VSS specific term)
A process that initiates change of data
on the original volume. Writers are
typically applications or system services
that write persistent information on a
volume. Writers also participate in the
shadow copy synchronization process
by assuring data consistency.
XBSA interface (Informix Server
specific term)
ON-Bar and Data Protector
communicate with each other through
the X/Open Backup Services
Application Programmer's Interface
(XBSA).
XCopy engine (direct backup specific
term)
A SCSI-3 copy command that allows
you to copy data from a storage device
having a SCSI source address to a
backup device having a SCSI
destination address, thus enabling direct
backup. The data flows from a source
device (either block or streaming, that
is, disk or tape) to the destination device
(either block or streaming) through
XCopy. This releases the controlling
server of reading the data from the
storage device into memory and then
writing the information to the
destination device.
See also direct backup.
ZDB
See zero downtime backup (ZDB).
ZDB database (ZDB specific term)
A part of the IDB, storing ZDB related
information such as source volumes,
replicas and security information. The
ZDB database is used for ZDB, and
instant recovery, and split mirror restore.
See also zero downtime backup
(ZDB).
ZDB to disk (ZDB specific term)
A form of zero downtime backup where
the replica produced is kept on the disk
array as a backup of the source volumes
at a specific point in time. Multiple
replicas, produced using the same
backup specification at different times,
can be kept in a replica set. A replica
from ZDB to disk can be restored using
the instant recovery process.
See also zero downtime backup
(ZDB), ZDB to tape, ZDB to
disk+tape, instant recovery, and
replica set rotation.
ZDB to disk+tape (ZDB specific term)
A form of zero downtime backup where
the replica produced is kept on the disk