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G-46
Glossary
that write persistent information on a
volume. Writers also participate in the
shadow copy synchronization process
by assuring data consistency.
XBSA interface (Informix specific
term)
The onbar utility and Data Protector
communicate with each other through
the X/Open Backup Specification
Services 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 disk backup (ZDB specific term)
The basic concept of ZDB disk backup
is to create a copy of data from the
original storage at a specific point-in-
time, and keep this copy of data in the
disk array in the replica storage version
selected from or created in the replica
storage pool. Data in the replica storage
version is not moved to standard backup
media. The data backed up utilizing the
ZDB disk backup functionality can be
either restored by utilizing the instant
recovery process or used for data mining
and similar purposes.
See also zero downtime backup
(ZDB), ZDB tape backup, ZDB disk/
tape backup, instant recovery, and
replica storage pool.
ZDB disk/tape backup (ZDB specific
term)
The basic concept of ZDB disk/tape
backup is to create a copy of data from
the original storage at a specific point-
in-time, and keep this copy of data in the
replica storage version. The copy of data
in the replica storage version is
additionally used for a backup to a
standard backup medium, typically a
tape. The data backed up using the ZDB
disk/tape backup can be restored using
the instant recovery or the standard Data
Protector restore procedure. It can also
be used for data mining and similar
purposes.
See also zero downtime backup
(ZDB), ZDB disk backup, ZDB tape
backup, instant recovery, and replica
storage pool.