6.18 Defining the TLOG

Before creating the UDL and defining UDL entries for TLOG, you must set the following parameters in the MACHINES section of the UBBCONFIG file for each machine in your application that uses global transactions. The following table lists the parameters:

Table 6-10 Parameter

Parameter	Description
TLOGDEVICE = string	The Oracle Tuxedo filesystem containing the distributed transaction processing (DTP) TLOG for this machine. If not specified, it is assumed that this machine has no TLOG.
TLOGOFFSET = offset	The numeric offset in pages (from the beginning of the device) to the start of the Oracle Tuxedo filesystem containing the DTP transaction log for this machine. The default is 0.
TLOGNAME = string	The name of the DTP transaction log for this machine. If not specified, the default is “TLOG.”
TLOGSIZE = size	The numeric size, in pages, of the DTP transaction log for this machine. If not specified, the default is 100 pages.

Because the TLOG seldom needs to be larger than 100 blocks (pages) and because disk partitions are always substantially larger than that, it may make sense to use the same device for both the TUXCONFIG file and the TLOG. If so, the pathname of the device needs to be specified by both the TUXCONFIG and the FSCONFIG environment variables.