NOTE

NOTE

Configuring HP DCE Cells

Integrating DCE Services with MC/ServiceGuard

10.Create the DCE daemon restart script using dce.restart as a sample template. Set the environment variable SG_DCE_BASE_DIR to /etc/cmcluster/pkg-name.

Distributing the Package

To distribute the package follow these steps:

1.Distribute the package configuration and control scripts across the nodes. From the primary node, enter;

rcp -r /etc/cmcluster/pkg-name\ secondary_node:/etc/cmcluster/pkg-name

2.Verify that the configuration scripts are correct. From the primary node, enter:

cmckeckconf -C /etc/cmcluster/cmclconfig.ascii \ -P /etc/cmcluster/pkg-name/pkg-name.conf

This command fails if the ServiceGuard daemons are running.

3. Apply the configuration on the cluster. From the primary node, enter:

cmapplyconf -v -f -C /etc/cmcluster/cmclconfig.ascii \ -P /etc/cmcluster/pkg-name/pkg-name.conf

This command fails if the ServiceGuard daemons are running.

Starting the ServiceGuard Cluster

The ServiceGuard cluster can be started automatically after a system boot. To do this, modify /etc/r.config.d/cmcluster and set the environment variable AUTOSTART_CMCLD to 1.

1. To manually start the ServiceGuard cluster services, enter:

cmruncl -v-nprimary_node -nsecondary_node

2. To view the cluster status, enter:

cmviewcl -v

Starting the Package on the ServiceGuard Cluster

Configured packages are started automatically on their primary nodes when the ServiceGuard cluster is started. Packages on the ServiceGuard cluster can be halted manually. To restart a package, use SAM or follow these steps.

Planning and Configuring HP DCE 1.7

5-39

Page 122 Page 124
Page 123
Image 123
HP UX DCE Software manual Distributing the Package, Starting the ServiceGuard Cluster
Page 122 Page 124

UX DCE Software specifications

HP UX DCE Software, or Hewlett-Packard UNIX Distributed Computing Environment, represents a significant tool in the realm of distributed system architecture. Designed primarily for enterprise environments, HP UX DCE enhances the reliability, scalability, and manageability of applications over diverse networked systems.

One of the main features of HP UX DCE is its ability to integrate various computing platforms, enabling seamless communication and resource sharing across distributed nodes. This facilitates the creation of complex applications that can operate on a multitude of systems, thus enhancing operational flexibility. DCE employs standardized interfaces, which means applications written for one platform can run on any other platform that supports DCE, promoting cross-platform compatibility.

In terms of technologies, HP UX DCE utilizes Remote Procedure Calls (RPC) as a core feature. This mechanism allows different applications to communicate and invoke procedures on remote systems as if they were local calls. Additionally, DCE includes a robust security model that incorporates Kerberos for authentication, ensuring that communication between nodes remains secure and protected against unauthorized access.

Another significant characteristic of HP UX DCE is its distributed file system, which allows for transparent file access across different machines. The DCE File System (DFS) provides a unified namespace and manages data replication and consistency across distributed storage resources. This reduces the complexity of data management and enhances data availability.

HP UX DCE also supports a variety of programming languages, making it accessible for developers accustomed to different coding environments. This versatility encourages widespread adoption and innovation, as developers can leverage existing skills to create distributed applications.

Furthermore, HP UX DCE is built for high availability, ensuring that critical applications remain responsive even in the face of hardware or network failures. Its inherent component redundancy and fault-tolerant architecture are designed to minimize downtime, which is essential for mission-critical applications in enterprise scenarios.

In conclusion, HP UX DCE Software provides a comprehensive framework for developing, deploying, and managing distributed applications. Its core features such as RPC support, a secure authentication mechanism, a robust file system, and cross-platform compatibility make it a vital resource for organizations aiming to leverage distributed computing effectively. As enterprises evolve, HP UX DCE stands out as an influential solution in the dynamic landscape of distributed environments.
Top Page Image Contents