IBM 000-8697 User Manual

IBM Informix OnLine Database Server Administrator’s Guide

If the

TAPEDEV

and

LTAPEDEV

values are the same, you must ensure that the

logical logs do not fill before the archive completes. If the logical log files fill
while the archive is under way, normal OnLine processing stops. Refer to

for guidelines on planning an archive schedule. Refer to

for an explanation of what happens if the logical log files become full during
an archive.

Verify that the current block size and tape size are appropriate for the device
specified. The block size of the logical log tape device is specified as

TAPEBLK

.

The tape size is specified as

TAPESIZE

.

If

TAPEDEV

 is specified as /dev/null, block size and tape size are ignored.

Specify

TAPEBLK

 as the largest block size permitted by your tape device.

OnLine does not check the tape device when you specify the block size.
Verify that the

TAPEDEV

tape device can read the block size that you specify.

If not, you cannot restore the tape.

Specify

TAPESIZE

as the maximum amount of data that should be written to

this tape.

The archive tape device is specified as

TAPEDEV

 in the configuration file.

You can change the value of

TAPEDEV

 while OnLine is in online mode. The

change takes effect immediately.

Be prepared to create a level-0 archive immediately after you make the
change, unless you change the value to /dev/null.

You can establish the value of

TAPEDEV

 as a symbolic link, enabling you to

switch between more than one tape device without changing the pathname.