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HTCondor
What it is
HTCondor is a free, self-hosted system for managing compute-intensive jobs. It queues and schedules work, sets priorities, monitors resources, and manages computing across networked clusters, cloud resources, and international grids. Its ClassAd mechanism pairs job requests with machine offers using configurable requirements and preferences. If a machine becomes unavailable while running a job, HTCondor can restart that work on another machine. It can transfer job data when machines do not share a file system, or route job input and output through the submitting machine. Separate installations can coordinate through flocking, and HTCondor-G works with Globus-managed resources. Linux, MacOS, and Windows are supported. The listed feature release is version 25.14.1, which adds a metric daemon able to export metrics to Prometheus and Ganglia. Security fixes cover the current feature release and current LTS; the previous LTS is supported for about twelve months after a new LTS release. The software and documentation are available under Apache License 2.0, without warranties or conditions. Contracted support is available for fees that vary by support policy.
For and against
For
- Free, self-hosted deployment
- Can restart jobs on another machine
- Matches jobs and resources with configurable rules
- Supports Linux, MacOS, and Windows
- Exports metrics to Prometheus and Ganglia
Against
- Self-hosted deployment is required
- Contracted support fees vary by policy
- Software is provided without warranties or conditions
The verdict
HTCondor provides job scheduling, resource matching, and recovery across distributed computing resources. Teams considering it should account for self-hosting and the scope of contracted support they may need.
Who it suits
HTCondor suits organizations that need to schedule compute-intensive work across self-hosted resources. Its platform support and job recovery may be relevant to teams operating clusters or coordinating installations.
Plans and prices
HTCondor
Software, source code, and complete documentation freely available under an open source license
Read 30 Sep 2026 · htcondor.org
On the record
- Current release
- The feature release listed on September 24, 2026 is version 25.14.1.htcondor.org · read 30 Sep 2026
- Data handling
- HTCondor can transfer job data when machines lack a shared file system, or redirect job I/O to the submit machine.htcondor.org · read 30 Sep 2026
- Distributed computing
- HTCondor uses computing resources across networked clusters, cloud resources, and international grids.htcondor.org · read 30 Sep 2026
- Grid interoperability
- HTCondor supports collaboration between installations through flocking, and HTCondor-G interoperates with Globus-managed resources.htcondor.org · read 30 Sep 2026
- Intended users
- The maker says hundreds of organizations in industry, government, and academia use HTCondor installations ranging from a handful to many thousands of workstations.htcondor.org · read 30 Sep 2026
- Job recovery
- When a machine running a job becomes unavailable, HTCondor can automatically restart the job on another machine.htcondor.org · read 30 Sep 2026
- License
- HTCSS is licensed under Apache License, Version 2.0 and distributed on an as-is basis without warranties or conditions.htcondor.org · read 30 Sep 2026
- Monitoring integrations
- The 25.14.1 release adds a metric daemon that can export metrics to Prometheus and Ganglia.htcondor.org · read 30 Sep 2026
- Project home
- HTCSS is housed within the Center for High Throughput Computing at the University of Wisconsin–Madison and receives NSF funding through the PATh project.htcondor.org · read 30 Sep 2026
- Purpose
- HTCondor is a workload management system for compute-intensive jobs, with job queueing, scheduling, priorities, resource monitoring, and resource management.htcondor.org · read 30 Sep 2026
- Resource matching
- Its ClassAd mechanism matches job requests with machine offers using configurable requirements and preferences.htcondor.org · read 30 Sep 2026
- Security support
- HTCondor provides security fixes for the current feature version and current LTS version, and supports the previous LTS for approximately twelve months after a new LTS release.htcondor.org · read 30 Sep 2026
- Supported platforms
- The maker lists Linux, MacOS, and Windows as supported platforms.htcondor.org · read 30 Sep 2026
- Support options
- Contracted support offers guaranteed problem resolution, faster issue turnaround, telephone access, and priority email access; fees vary by support policy.htcondor.org · read 30 Sep 2026
