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Creating the Universal Device List and TLOG on a UNIX System
The Universal Device List (UDL) serves as a map of the BEA Tuxedo file system that is loaded into shared memory when the application is booted. The TLOG is a file in which information about a transaction is kept until the transaction is completed.
Creating the UDL
To create the UDL, execute the following command before booting the application.
tmadmin -c
crdl -z config -b blocks
Here -z config specifies the full path name for the device on which the UDL should be created and -b specifies the number of blocks to be allocated on the device. The value of config should match the value of the TLOGDEVICE parameter in the MACHINES section of the UBBCONFIG file.
Creating the TLOG
Several parameters in the MACHINES section of the UBBCONFIG file allow you to define a global transaction log (TLOG). The BEA Tuxedo system administrator must manually create a device list entry for the TLOGDEVICE on each machine on which a TLOG is needed. These entries can be created either before or after TUXCONFIG has been loaded, but they must be created before the system is booted.
To create an entry in the UDL for the TLOG device, create the UDL as described above on each node that will be involved with global transactions. If the TLOGDEVICE is mirrored between two machines, it is not necessary to perform this step on the paired machine. The BBL initializes and opens the TLOG during the boot process.
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Copyright © 2000 BEA Systems, Inc. All rights reserved.
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