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AdministeringIn addition to administering the database server, you can tune performance, replicate data, and archive data.
System administrationThese topics contain concepts, procedures, and reference information for database and database server administrators to use for managing and tuning HCL OneDB™ database servers.
Administrator's GuideThe HCL OneDB™ Administrator's Guide provides the information required to administer HCL OneDB™.
The database server
Client/server communicationThese topics explain the concepts and terms that you must understand in order to configure client/server communication.
Distributed Relational Database Architecture™ (DRDA®) communicationsDRDA is a set of protocols that enables multiple database systems and application programs to work together.
The DRDAEXEC thread and queries from clientsFor every DRDA® client, HCL OneDB™ creates a session and a DRDAEXEC thread, which is the equivalent of an SQLEXEC thread, to process and run the queries. This thread also formats the results of the queries in the DRDA® protocol format and sends the results back to the client computer.

The DRDAEXEC thread and queries from clients

For every DRDA® client, HCL OneDB™ creates a session and a DRDAEXEC thread, which is the equivalent of an SQLEXEC thread, to process and run the queries. This thread also formats the results of the queries in the DRDA protocol format and sends the results back to the client computer.

Queries issued from a DRDA client run in parallel if PDQPRIORITY is set and the query can run in parallel. Queries run from DRDAEXEC threads can also run in parallel.