Recovery can be costly, so using the proper shutdown command improves connection or startup performance. To access an unarchived database from the class path, specify the name of the database relative to the directory in the class path. For information on setting this and other properties, see Tuning Cloudscape. Databases do not necessarily have to live inside the system directory , but keeping your databases there is the recommended practice. Not having the user names and passwords maintained in the database means less administrative overhead to transfer names into the database. You can access read-only databases in jar or zip files by specifying jar as the subsubprotocol, like this:. In a Java application, you typically load the driver with the static Class.

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If you combine this attribute with any other attributes, they are ignored except for shutdown. If you will be using a JDBC 2. This simplifies application deployment, because it reduces the potential for problems with a user’s class path.

This is useful for improving performance, not jdc improved recovery. No data exists in clear-text form in the database files. The attribute is ignored if no upgrade is needed. For details, see Platform Support. All data in such a database is decrypted by the database engine when read and re-encrypted when written back to disk.

This driver requires an Oracle client installation. Using the database connection URL as described here, you can connect to databases in more than one directory at cloudscaape time.


For example, when Cloudscape is running in the Cloudconnector environment, a client application might use the following database connection URL:. Each Derby instance can manage multiple databases, the databases can live on various media, and there’s nothing to stop the application from connecting to other DBMS systems. This makes the database data and its logic into a single, self-contained application package.

Cloudscape Version 10: A technical overview

An application can shut down a single database within a Cloudscape system and leave the rest of the system running. For more clouescape on creating synchronization databases, see the Cloudscape Synchronization Guide.

It is based on the 1. A page is a unit of storage whose size is configurable on a system-wide, database-wide, or conglomerate-specific basis.

Cloudscape Version A technical overview

The examples in this section use the syntax of the database connection URL for use in an embedded environment. When used in this manner, jjdbc can use any functionality available in the two-tier driver in a WebLogic multitier configuration.

Cloudconnector is shut down with a utility. You can also access databases from the class path or from a jar file in the class path or not as read-only databases.

G Example properties for Cloudscape JDBC driver (Cloudscape)

Severe and non-recoverable corruption can result and may have already occurred. Derby provides developers with a small footprint, standards-based Java database that can be tightly embedded into any Java-based solution. Cloudscape Embedded Basics This section explains how to use and configure Cloudscape in an embedded environment.

The system directory contains cloudxcape persistent system-wide configuration cloudsscape, or properties, specific to that system in a properties file called cloudscape.


You could potentially have two instances of Cloudscape running on the same machine at the same time, but each instance must run in a different system; two separate instances of Cloudscape should not access databases within the same system.

System-wide properties affect the entire system, and persistent system-wide properties live in the system directory.

Derby provides persistence of data by storing data in disk files. Moving forward, think Derby for the core database features and IBM Cloudscape for the supported commercial release.

Cloudscape database directories contain files and directories used by cloudscaps software. You can set many Cloudscape properties as database-level properties.

Connect to cloudscape : Cloudscape « Database SQL JDBC « Java

Derby supports a simple, built-in mode for maintaining an internal list of authorized users. When a Cloudscape system shuts down, a message goes to the information log: The T3 client services are scheduled for deprecation in a future release of WebLogic Server. You access an existing database by specifying it in the Cloudscape database connection URL in jjdbc of the following:.

In normal operation, Cloudscape keeps the log small through periodic checkpoints. Because of the time needed to boot a database, the number of databases in the system directory affects startup performance if you use that configuration.