Archivematica 1.16.0 and Storage Service 0.22.0 release notes

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Release date: TBD

Environments

Please see the installation instructions.

Archivematica 1.16.0 and Storage Service 0.22.0 have been tested in the following environments:

• Ubuntu 22.04 64-bit Server Edition
• Rocky Linux 9 x86_64

For development purposes, most of our developers prefer to use Docker containers. These and all above environments are linked from the installation instructions above.

Changed

PRONOM v.116

As of this Archivematica release, we are up to date to PRONOM v. 116.

GitHub issue 1653

Python versions

• Issue: https://github.com/archivematica/Issues/issues/1632

Archivematica 1.16 works with all the current Python supported versions: 3.8 - 3.12.

Django 4.2

• Issue: https://github.com/archivematica/Issues/issues/1624

Archivematica 1.16 dropped support for Django 3.2.

Fixed

Update MCPClient forking model

• Issue: https://github.com/archivematica/Issues/issues/1482

Archivematica 1.16.0 introduces a new prefork execution model in MCPClient based on a process pool. MCPClient workers are automatically restarted to free resources and will reuse database connections when possible.

The following new settings were added to the MCPClient service:

• ARCHIVEMATICA_MCPCLIENT_WORKERS defines the number of MCPClient workers. If undefined, it defaults to the number of CPUs available on the machine. Only client modules that define concurrent_instances will perform concurrent execution of tasks (e.g. identify_file_format).

• ARCHIVEMATICA_MCPCLIENT_MAX_TASKS_PER_CHILD defines the maximum number of tasks a worker can execute before it's replaced by a new process in order to free resources.

• ARCHIVEMATICA_MCPCLIENT_MCPCLIENT_PROMETHEUS_DETAILED_METRICS indicates that detailed metrics should be sent to Prometheus. With large transfers this might affect performance of the local storage in Prometheus and slow down its threads in Archivematica.

See the MCPClient Configuration page.

DIPs are cleaned from watched directories

• Issue: https://github.com/archivematica/Issues/issues/1665

Duracloud spaces retry chunk downloads

• Issue: https://github.com/archivematica/Issues/issues/1607

Thank you Carlos Mc Gregor for contributing this fix!

Please see the 1.16.0 milestone in GitHub for all issues addressed in this release: https://github.com/archivematica/Issues/milestone/24?closed=1.