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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.
Two-phase commit and recoveryThe two-phase commit protocol is used to ensure that distributed queries are uniformly committed or rolled back across multiple database servers. A database server automatically uses the two-phase commit protocol for any transaction that modifies data on multiple database servers.

Two-phase commit and recovery

The two-phase commit protocol is used to ensure that distributed queries are uniformly committed or rolled back across multiple database servers. A database server automatically uses the two-phase commit protocol for any transaction that modifies data on multiple database servers.

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