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Designing databasesThe first step in creating a relational database is to construct a data model, which is a precise, complete definition of the data you want to store. After you prepare your data model, you must implement it as a database and tables. To implement your data model, you first select a data type for each column and then you create a database and tables and populate the tables with data. You can also implement fragmentation strategies and control access to your data.
Designing and Implementing a DatabaseThe HCL OneDB™ Database Design and Implementation Guide provides information to help you design, implement, and manage your HCL® OneDB® databases. It includes data models that illustrate different approaches to database design and shows you how to use structured query language (SQL) to implement and manage your databases.
Managing databases
Distributed queries
Transaction processingWhen using distributed queries in a transaction processing environment, be aware of the effect of the isolation level of a transaction, the effect of the SET LOCK MODE statement in conjunction with the DEADLOCK_TIMEOUT configuration parameter, and the two-phase commit protocol.
DEADLOCK_TIMEOUT and SET LOCK MODEWhen working with distributed queries, you can use the SET LOCK MODE statement in conjunction with the DEADLOCK_TIMEOUT configuration parameter to help prevent server deadlock.

DEADLOCK_TIMEOUT and SET LOCK MODE

When working with distributed queries, you can use the SET LOCK MODE statement in conjunction with the DEADLOCK_TIMEOUT configuration parameter to help prevent server deadlock.

When you request the WAIT option of SET LOCK MODE, the database server protects against the possibility of a deadlock. However, if the database server discovers that a deadlock can occur, it terminates the operation and returns an error.

The DEADLOCK_TIMEOUT configuration parameter specifies the maximum number of seconds that a database server thread can wait to acquire a lock. This value is the default value used by the SET LOCK MODE WAIT statement. This value applies only if you acquire locks on the current and remote database server within the same transaction.

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