Parsing the intrinsic characteristics of database application architecture

Adaptive Server Anywhere Intrinsic characteristics

Although you never need to work with the internal structure of your database server, if you have some understanding of its internal structure, you can help you better understand the processes involved.

Database server intrinsic characteristics

The internal structure of adaptive Server Anywhere database servers allows you to efficiently handle multiple requests.

The communication layer can handle the actual data exchange with the client application. This communication layer receives the request from the client application and returns the result. The timing of these operations is controlled by the negotiation between the client and the server, ensuring that network traffic is kept to a minimum, and that data is available as soon as possible on the client.

The analyzer checks every SQL statement sent to the database server and converts it into an internal format that is available for processing.

If the request is a query, update, or DELETE statement, there may be many different ways to access the data, and the time may vary significantly. The optimizer's job is to choose from all of these possible methods to find the best way to get the data you need quickly.

The Java Virtual machine is built into the database server, and the Java VM handles all Java operations that are sent by the client application or that are called internally by the database server.

The lowest level of the database server involves reading data from the disk and writing the data to disk, storing the data in memory to avoid unnecessary disk access, and balancing the requirements of different users.