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Specifying the size of
disk backups
Specifying stacker
devices
Specifying devices for
third party backups
•
For unattended backups with
to open the next tape. If there are no volumes available, or if you did not
specify
, you get an error.
STACKER
Any additional tapes do not contain the header information needed for a
restore, so you must be careful to mount tapes in order during the restore or
your database could become corrupt.
On Windows NT, there are special requirements for the
devices:
•
The value of
must be a multiple of 64.
SIZE
•
If you specify a
SIZE
rounded down to a multiple of 64.
•
If you do not specify
If you specify
explicitly on any platform, and on NT even if you do not
SIZE
specify it explicitly, then if you run of space on a tape backup, you get an error
and the backup fails.
The
option of the
SIZE
TO
data on that stripe, in KB.
If you use the Sybase–provided backup, either attended or unattended, specify
if you need a maximum size other than the default of 2GB. When you
SIZE
omit
for a backup to disk,
SIZE
as an archive_device can be up to 2GB.
For example, if you specify one archive_device, a disk file called janfull, and
you specify SIZE 200000 for a maximum 200MB file, but your backup
requires 2GB, then
BACKUP
janfull.2,...janfull.10.
The
option of the
STACKER
automatically loaded multitape stacker device, and specifies the number of
tapes in that device. When
waits indefinitely for the next tape to be loaded. All tapes in a given
BACKUP
stacker device must be the same size.
Note
Do not specify
SIZE
product, as size information is conveyed in the vendor_specific_information
string. To specify this string, see "Performing backups with non-Sybase
products".
CHAPTER 11
Backup and Data Recovery
and
SIZE
STACKER
that is not a multiple of 64, it is automatically
explicitly, it is automatically set to 1.5GB.
SIZE
clause identifies the maximum size of the backed up
assumes that each disk file you name
BACKUP
creates ten 200MB files: janfull.1,
clause indicates that you are backing up to an
TO
is
and
ATTENDED
ON
STACKER
or
if you are using a third party backup
STACKER
specified, Backup tries
option on tape
SIZE
is specified,
387
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