SYNBACKUP

Enable backup mode feature

 

 

USupported on UNIX

 

The SYNBACKUP environment variable enables the backup mode feature, which means I/O update operations can be frozen so a Synergy system backup can safely be performed.

Value

Any value.

Discussion

The SYNBACKUP environment variable is available for use by the synbackup utility, which enables you to back up your Synergy system without terminating all applications or processes accessing the files. On UNIX, the current backup mode (Pending, On, Off, or Not Allowed) is maintained in a shared memory segment on the system. The synbackup utility initializes and maintains this shared memory segment, as well as sets the backup mode to Pending, On, or Off. The base address of this memory segment is stored in the file DBLDIR:synbackup.cfg. So that the runtime does not have to repeatedly open this file, it first checks the environment variable SYNBACKUP. The runtime only opens the synbackup.cfg file to retrieve the base address if SYNBACKUP is set.

When SYNBACKUP is not set, the backup mode feature is disabled.

Setting location

The setsde file created by the installation, but it is commented out at installation and must be uncommented by the system administrator.

Used by

synbackup.

See also

synbackup utility.

Examples

SYNBACKUP=1