Welcome
What's New
View new features for VOV Subsystem 2025.1.0.
Overview
Discover the workspace, licensing and installation, and training.
VOV Subsystem Tutorials
Discover VOV Subsystem functionality with interactive tutorials.
VOV Subsystem Administrator Guide
This manual provides information about managing a VOV project, including starting the server and connecting computing resources such as computers and licenses.
VOV Subsystem Reference Guide
- Command Line Interface
- Fields, Selection Rules and Formatting Strings
- VOV Metrics
  The Altair Accelerator allows users to collect arbitrary metrics, where a metric is defined as a "named time series" of values, where each value is either a floating point number or a string.
- Miscellaneous
  - Inner Loop Timers
    The vovserver tracks how the time is spent in the inner loop. The statistics are accumulated over multiple loops and are rotated every 10 seconds, so what you normally see in the stats is the overall time spent in the past 10 to 20 seconds.
  - Sequence of Firing of a Job on a Tasker
  - Error Message: "Too many notify clients for user ..."
  - Error message: "Cannot accept more connections"
  - vtk_server_config
  - Expected Duration
  - Environment Variables
  - Other Files Used by VOV
  - HTML Pages
  - Raw HTTP/VOV Interface
- VOV Security Infrastructure
- REST Application Programming Interface
  Altair Accelerator supports a RESTful API that enables a developer to submit, monitor, and control batch jobs as well as query the batch scheduler queues, jobs, and hosts in useful ways.
- All About Tcl
- VTK Procedures
EDA Tool Integration Guide
This document is a collection of techniques that have proven to be useful when applying FlowTracer in Electronic Design Automation.

Expected Duration

The expected duration of a job is the duration of the most recent successful execution of the job. The job's expected duration may also be specified by the user.

In FlowTracer this is done in the Flow.tcl script using the procedure X. Accelerator users can specify the expected duration of a job with the option -xdur <TimeSpecification> of nc run.

If the user has not specified an expected duration and the job has not yet completed successfully, its expected duration is unknown, represented by -1.

The current expected duration can be accessed in formatting strings using the fields XDUR and XDURPP.

The last expected duration specified by the user, if any, can be accessed in formatting strings using the fields USERXDUR and USERXDURPP. Note that these values are intended for reference purposes and may differ from XDUR and XDURPP.