IBM 000-8697 Benutzerhandbuch
Installation and Initial Configuration
1-29
Logical Log Tape Device Guidelines
The default value of
TAPEDEV
is /dev/tapedev.
You can set the value of
TAPEDEV
to /dev/null if you are testing or proto-
typing an application, or if you are using OnLine in a learning environment.
During OnLine operation, some tasks require that you create an archive. If
you set
During OnLine operation, some tasks require that you create an archive. If
you set
TAPEDEV
to /dev/null, you can create an archive instantly, without
overhead. However, you are not archiving your OnLine data. You cannot
perform a restore.
perform a restore.
You can set the value of
TAPEDEV
to specify a tape device on another host
machine and create archives across your network. For instructions on how to
do this, refer to
do this, refer to
Tape devices that do not rewind automatically before opening and on closing
are considered incompatible with OnLine operation.
are considered incompatible with OnLine operation.
TAPEBLK
TAPEBLK
specifies the block size of the archive tape device, in kilobytes.
Specify the largest block size permitted by your tape device. If the tape device
pathname is /dev/null, the block size is ignored. The default value of
pathname is /dev/null, the block size is ignored. The default value of
TAPEBLK
is 16
KB
.
TAPESIZE
TAPESIZE
specifies the maximum amount of data that should be written to
each tape, expressed in kilobytes. If the tape device pathname is /dev/null,
the tape size is ignored. The default value of
the tape size is ignored. The default value of
TAPESIZE
is 10,240
KB
.
Logical Log Tape Device Guidelines
This section describes how to assign values to the logical log backup tape
device parameters. Refer to
device parameters. Refer to
for a complete list of logical log admin-
istration topics related to logical log backups.
As OnLine administrator, you are responsible for the prompt back up of the
logical log files. The logical log backup tapes, along with the archive tapes,
constitute a complete copy of your OnLine data.
logical log files. The logical log backup tapes, along with the archive tapes,
constitute a complete copy of your OnLine data.