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Accelerator Plus Administrator Guide
This guide is written for the Accelerator Plus system administrator who needs to configure and manage one or more Accelerator Plus instances.
Accelerator Plus Server and System Configuration
Start and Stop Accelerator Plus
The command wxmgr is identical to ncmgr.

Welcome
What's New
View new features for Accelerator Plus 2025.1.2.
Accelerator Plus Overview
Accelerator Plus is a high-performance hierarchical scheduler designed for distributed High Performance Computing (HPC) environments.
Accelerator Plus Tutorials
Currently there are no Accelerator Plus tutorials available.
Accelerator Plus User Guide
Accelerator Plus is a high-performance hierarchical scheduler designed for distributed High Performance Computing (HPC) environments.
Accelerator Plus Administrator Guide
This guide is written for the Accelerator Plus system administrator who needs to configure and manage one or more Accelerator Plus instances.
- System Overview
  Accelerator Plus is a high-performance hierarchical scheduler designed for distributed High Performance Computing (HPC) environments.
- Accelerator Plus Server and System Configuration
  - Start and Stop Accelerator Plus
    The command wxmgr is identical to ncmgr.
  - Integration with PBS
    Accelerator Plus has added the capability to use PBS Professional as its base scheduler. For the 2019.01 release, jobs can be submitted through Accelerator Plus and run on a PBS complex.
  - Daemons for Accelerator Plus
    Some key functionality in Accelerator Plus is provided by external daemons.
  - Theory of Operation
    This section describes the theory of the operation of Accelerator Plus on Accelerator and how to address problems should they occur.
  - vovwxd Configuration
    In order to successfully run jobs under Accelerator Plus, submitting to Accelerator, some configuration must be done up front.
  - Using Direct Drive with vovwxd
    Direct Drive provides a method to reduce latency of job start times and improved scaling as more base queues are added.
  - VOV Security Keys
  - Regulate Access to Accelerator Plus
    Like all vovservers, access to Accelerator Plus can be controlled by editing the security file wx.swd/security.tcl.
  - Job Status
    In Accelerator Plus, each job goes through a number of states until completion.
  - Job Submission Policy
    The job submission behavior of Accelerator Plus or Accelerator Plus can be controlled by the file vnc_policy.tcl, which resides in the vovserver configuration directory.
  - Accelerator Plus Customization
    Many aspects of Accelerator Plus behavior can be customized.
  - Customize the wx run Command
    The wx run command has built-in default features that include checking the validity of the run directory, enabling job profiling, etc. This section describes how the Accelerator Plus administrator can use the file $VOVDIR/local/vncrun.config.tcl to modify some defaults. This file does not exist by default; it must be created when needed.
  - Customize the wx list Command
    This section describes how the Accelerator Plus administrator can use the file $VOVDIR/local/vnclist.config.tcl to modify some defaults for the wx list command. This file does not exist by default; it must be created when needed.
  - Troubleshooting
  - Job Placement Policies
  - Web Server Configuration
  - Web Interface
    Some features of the Accelerator Plus web interface can be configured by the administrator. Configuration for these items is performed in the vnc.swd/config/web.cfg file.
  - Using Accelerator as a Base Scheduler
    When interfacing to Accelerator, a minimal (zero) configuration for Accelerator Plus is recommended.
  - Many Accelerator Plus Queues on Many Accelerator Queues
- Log Files
- Jobclasses
- Resource Management
  Altair Accelerator includes a subsystem for managing computing resources. This allows the design team to factor in various constraints regarding hardware and software resources, as well as site policy constraints.
- Frequently Asked Questions and Troubleshooting Tips
  This section provides recommendations to obtain the maximum performance from Accelerator Plus.

View All Altair Accelerator Help

Start and Stop Accelerator Plus

The command wxmgr is identical to ncmgr.

To understand the details, refer to Start and Stop ncmgr

Start Accelerator Plus at System Boot Time on Linux

This step is optional.

The instructions in this section are valid for Linux.

Note: This part of the installation requires root permission.

The Accelerator Plus vovserver can be restarted at reboot by installing the proper script in both the /etc/rc3.d and /etc/rc5.d directories for Linux.

Run the following commands on the host that was selected as the Accelerator Plus vovserver.

% /bin/su -
% cp $VOVDIR/etc/boot/S99wx /etc/rc3.d/S99wx
% chmod 755 /etc/rc3.d/S99wx
% vi /etc/rc3.d/S99wx
....
Edit configurable items as needed.

Note: sudo should be used where configured. To avoid Trojan Horse programs, su should always be called using the full path /bin/su on Linux.

You can test with:

% ./S99wx start

% ./S99wx stop

Note: Re-start the Accelerator Plus server with the command ./S99wx start after testing the stop capability.