HP DCE Measurement Service

Overview of DMS

DMS Prerequisite

You must install HP GlancePlus on the system where you intend to run DMS.

Enabling and Disabling DMS

DMS operates in three different modes:

•Disabled

•Inactive (the default)

•Active

You disable DMS by setting the environment variable DMS_FORCEOFF to any value and exporting the variable. (The software checks that DMS_FORCEOFF exists, not that the variable has any particular value.) DMS is also disabled when the effective-user-id (euid) of a process is not root.

DMS is inactive by default. DMS is inactive when a DCE process is running, DMS_FORCEOFF is not set, there is no instance of HP GlancePlus executing, and the process euid is root.

DMS is active when a DCE process is running, DMS_FORCEOFF is not set, and at least one instance of HP GlancePlus is executing, and the process euid is root.

Performance Considerations of DMS

If DMS is installed on your system, but disabled, it has no significant impact on the system or on the performance of the server.

If DMS is inactive, there is no significant performance impact on the system.

When DMS is active, there is normally a performance decrease of less than 5%; in some cases, HP GlancePlus and swapping may cause a throughput decrease of greater than 5%.

DMS Documentation

DMS documentation, like HP GlancePlus documentation, is in the form of online context-sensitive help. You can access the GlancePlus online help from the Help Manager (the “ ?”) on the Front Panel.

Planning and Configuring HP DCE 1.7

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HP UX DCE Software DMS Prerequisite, Enabling and Disabling DMS, Performance Considerations of DMS, DMS Documentation
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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.
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