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Computing with HTCondor™

Our goal is to develop, implement, deploy, and evaluate mechanisms and policies that support High Throughput Computing (HTC) on large collections of distributively owned computing resources. Guided by both the technological and sociological challenges of such a computing environment, the Center for High Throughput Computing at UW-Madison has been building the open source HTCondor distributed computing software (pronounced "aitch-tee-condor") and related technologies to enable scientists and engineers to increase their computing throughput.

Note: The HTCondor Software Suite (HTCSS) was known as 'Condor' from 1988 until its name changed in 2012. If you are looking for Phoenix Software International's software development and library management system for z/VSE or z/OS, click here.

Latest News [RSS]

HTCondor 8.9.13 released!

March 30, 2021

The HTCondor team is pleased to announce the release of HTCondor 8.9.13. This development series release contains new features that are under development. This release contains all of the bug fixes from the 8.8.13 stable release. WARNING: We have changed the default security model in this release. It is not a drop-in replacement for any earlier release. Please read the notes before proceeding with an upgrade. Manual intervention may be required. Enhancements in the release include: Host based security is no longer the default security model; Hardware accelerated integrity and AES encryption used by default; Normally, AES encryption is used for all communication and file transfers; Fallback to Triple-DES or Blowfish when interoperating with older versions; Simplified and automated new HTCondor installations; HTCondor now detects instances of multi-instance GPUs; Fixed memory leaks (collector updates in 8.9 could leak a few MB per day); Many other enhancements and bug fixes, see version history for details. A complete list of new features and fixed bugs can be found in the version history. Try out our new helpful installation scripts. Further details can be found in the Development Version History and the Stable Version History. HTCondor 8.9.13 binaries and source code are available from our Downloads page.
HTCondor 8.9.12 no longer available

March 26, 2021

On March 26 2021 at 3:30pm the HTCondor v8.9.12 release was pulled down from our website after significant backwards-compatibility problems were discovered. We plan to fix these problems in v8.9.13 to be released by March 30. We apologize for any inconvenience.
HTCondor 8.9.12 released!

March 25, 2021

The HTCondor team is pleased to announce the release of HTCondor 8.9.12. This development series release contains new features that are under development. This release contains all of the bug fixes from the 8.8.13 stable release. WARNING: We have changed the default security model in this release. It is not a drop-in replacement for any earlier release. Please read the notes before proceeding with an upgrade. Manual intervention may be required. Enhancements in the release include: Host based security is no longer the default security model; Hardware accelerated integrity and AES encryption used by default; Normally, AES encryption is used for all communication and file transfers; Fallback to Triple-DES or Blowfish when interoperating with older versions; Simplified and automated new HTCondor installations; HTCondor now detects instances of multi-instance GPUs; Fixed memory leaks (collector updates in 8.9 could leak a few MB per day); Many other enhancements and bug fixes, see version history for details. A complete list of new features and fixed bugs can be found in the version history. Try out our new helpful installation scripts. Further details can be found in the Development Version History and the Stable Version History. HTCondor 8.9.12 binaries and source code are available from our Downloads page.
HTCondor 8.8.13 released!

March 23, 2021

The HTCondor team is pleased to announce the release of HTCondor 8.8.13. A stable series release contains significant bug fixes. Highlights of this release are: condor_ssh_to_job now maps CR and NL to work with editors like nano; Improved the performance of data transfer in condor_ssh_to_job; HA replication now accepts SHA-2 checksums to prepare for MD5 removal; Submission to NorduGrid ARC CE works with newer ARC CE versions; Fixed condor_annex crashes on platforms with newer compilers; Fixed "use feature: GPUsMonitor" to locate the monitor binary on Windows; Fixed a bug that prevented using the "@" character in an event log path. More details about the fixes can be found in the Version History. HTCondor 8.8.13 binaries and source code are available from our Downloads page.
HTCondor Security Release: 8.9.11

January 27, 2021

The HTCondor team is pleased to announce the release of HTCondor 8.9.11. These releases contain important fixes for security issues. Affected users should update as soon as possible. More details on the security issues are in the Vulnerability Reports: HTCondor binaries and source code are available from our Downloads page.
Come find us on Twitter!

December 23, 2020

After a long social media absence, we’ve resuscitated our Twitter acount where we’ve been posting about HTCondor news, events, philosophy and other distributed systems related banter. Come find us and chime in! https://twitter.com/HTCondor

HTCondor Week 2021

HTCondor Week 2021 will be a free, virtual event taking place the week of May 24-28, 2021. Registration is required and open now: http://htcondor.org/HTCondorWeek2021

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