Altair Accelerator Guides

2021.2.0

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Altair Accelerator Administrator Guide
Configure and manage the use of Accelerator after it is installed.
vovtasker Configuration

What's New
Accelerator Overview
Accelerator Tutorials
Altair Accelerator User Guide
Altair Accelerator Administrator Guide

Index

2021.2.0

Altair Accelerator Guides

What's New
View new features for Accelerator 2021.2.0.
Accelerator Overview
Discover the available Altair Accelerator guides.
Accelerator Tutorials
Discover Accelerator functionality with interactive tutorials.
Altair Accelerator User Guide
Basic tasks in Accelerator, including submitting jobs, tracking job information, and analyzing and solving common problems.
Altair Accelerator Administrator Guide
Configure and manage the use of Accelerator after it is installed.
- Use Accelerator Help
  Accelerator documentation is available in HTML and PDF format.
- Accelerator Quick Start
  Accelerator has two main commands, nc and ncmgr.
- Command Line Interface
- Quick Reference
- Accelerator Server and System Configuration
- Storage Aware Scheduling
  This daemon vovfilerd replaces older daemons like vovisilond, vovnetappd and vovregulatord. Also the utility vovfiler_setup is no longer needed. The visualization of the filer information is now done either via the vovfilerd.cgi page or via the utility vovfilerdgui.
- vovtasker Configuration
  - Taskers
    A tasker is a VOV client that provides computing resources, specifically CPU cycles, to the vovserver.
  - Create a Tasker on Windows
  - UNIX User Impersonation
    A normal vovtasker has the privileges and limitations of the account in which it runs. When a normal vovtasker executes a command, the effect is the same as when the vovtasker's owner runs the command.
  - The taskers.tcl File
    The taskers.tcl file describes the taskers for a project.
  - vtk_tasker_define
    There are many options that can be used with vtk_tasker_define and vtk_tasker_set_default.
  - Tasker Attributes
    A tasker is characterized by several attributes. These attributes are controllable by means of the command line arguments to the vovtasker binary as well as by means of the procedure vtk_tasker_define in the taskers.tcl configuration file for a VOV project.
  - Manage Tasker Lists
    A tasker list is a named, ordered list of taskers. Tasker lists can be used to enhance performance or restrict usage.
  - Control the Capacity of Taskers: Slots and Cores
    The resources of a tasker include SLOTS, SLOTSTOTAL, CORES and CORESTOTAL.
  - Tasker Health Checks
    By default, the vovtasker does not perform many health checks. If the jobs can be executed successfully, that is normally enough of a check.
  - Configuration File for vovagent
    For cases where the vovtaskers are started by submitting the binary to a separate batch queue system such as LSF or SGE, the system administrator may decide to use vovagent, which is a special copy of the vovtasker binary.
  - Tasker Load Reports
    vovtasker continuously logs 1 minute, 5 minute and 10 minute load averages of the machine where the tasker is running. Tasker load reports are available on the Tasker Load page.
  - RAM Sentry
  - Define Policies for Taskers
  - Time-Variant Taskers
    Time-variant taskers resources can be configured using Tcl. Any procedure can be defined in the namespace VovResources and then used to compute the resource list.
  - Allocate Jobs to Machines Based on Percentages
  - SGE Style Load Sensors
    vovtaskers also support SGE style load sensors. Use option -L in vovtasker/vovtaskerroot to define the command line for the load sensor.
  - Start a Remote UNIX Tasker
  - Taskers on Windows
  - Windows User Impersonation
  - Manage Remote Taskers without SSH/RSH Capabilities
  - Black Hole Detection
  - Troubleshooting a SICK Tasker
  - Tasker Reservations
  - Clean up Processes Left Behind by Completed Jobs
- Database
  Accelerator stores historical information about jobs in a relational database. As of version 2015.09, the database is fully integrated and managed as part of Accelerator. This section provides an overview of the components that run and manage the database.
- FairShare
- Jobclasses
- Preemption
  Preemption is the process of reserving or revoking resources from other jobs in order to help "important jobs" finish quickly.
- 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.
- Environment Management
  To ensure the correct and repeatable behavior of the tools, the environment must be controlled. This chapter explains how VOV supports multiple reusable environments.
- Configure a Failover Server Replacement
  If a server crashes suddenly, VOV has the capability to start a replacement server on a pre-selected host. This capability requires that the pre-selected host is configured as a failover server.
- Directories and Files
- Notifications
- System Tasks
- Upgrade Accelerator
  This section provides instructions to change the software version on which Accelerator runs.
- Frequently Asked Questions and Troubleshooting Tips
- Backwards Compatibility and Migrating from Previous Versions
  This chapter provides information about deprecated features that are still supported. This information is provided should you see older commands in use after a software upgrade or migrating to a newer Accelerator.

View All Altair Accelerator Help

Altair Accelerator Guides

2021.2.0

Home
Altair Accelerator Administrator Guide
Configure and manage the use of Accelerator after it is installed.
vovtasker Configuration

What's New
Accelerator Overview
Accelerator Tutorials
Altair Accelerator User Guide
Altair Accelerator Administrator Guide

Index

vovtasker Configuration

Taskers
A tasker is a VOV client that provides computing resources, specifically CPU cycles, to the vovserver.
Create a Tasker on Windows
UNIX User Impersonation
A normal vovtasker has the privileges and limitations of the account in which it runs. When a normal vovtasker executes a command, the effect is the same as when the vovtasker's owner runs the command.
The taskers.tcl File
The taskers.tcl file describes the taskers for a project.
vtk_tasker_define
There are many options that can be used with vtk_tasker_define and vtk_tasker_set_default.
Tasker Attributes
A tasker is characterized by several attributes. These attributes are controllable by means of the command line arguments to the vovtasker binary as well as by means of the procedure vtk_tasker_define in the taskers.tcl configuration file for a VOV project.
Manage Tasker Lists
A tasker list is a named, ordered list of taskers. Tasker lists can be used to enhance performance or restrict usage.
Control the Capacity of Taskers: Slots and Cores
The resources of a tasker include SLOTS, SLOTSTOTAL, CORES and CORESTOTAL.
Tasker Health Checks
By default, the vovtasker does not perform many health checks. If the jobs can be executed successfully, that is normally enough of a check.
Configuration File for vovagent
For cases where the vovtaskers are started by submitting the binary to a separate batch queue system such as LSF or SGE, the system administrator may decide to use vovagent, which is a special copy of the vovtasker binary.
Tasker Load Reports
vovtasker continuously logs 1 minute, 5 minute and 10 minute load averages of the machine where the tasker is running. Tasker load reports are available on the Tasker Load page.
RAM Sentry
Define Policies for Taskers
Time-Variant Taskers
Time-variant taskers resources can be configured using Tcl. Any procedure can be defined in the namespace VovResources and then used to compute the resource list.
Allocate Jobs to Machines Based on Percentages
SGE Style Load Sensors
vovtaskers also support SGE style load sensors. Use option -L in vovtasker/vovtaskerroot to define the command line for the load sensor.
Start a Remote UNIX Tasker
Taskers on Windows
Windows User Impersonation
Manage Remote Taskers without SSH/RSH Capabilities
Black Hole Detection
Troubleshooting a SICK Tasker
Tasker Reservations
Clean up Processes Left Behind by Completed Jobs

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