# Retention policy for Preview releases on "slicer-packages.kitware.com"

**URL:** <https://discourse.slicer.org/t/retention-policy-for-preview-releases-on-slicer-packages-kitware-com/31305>\
**Category:** Support\
**Created:** [August 23, 2023, 3:18am UTC](https://discourse.slicer.org/t/retention-policy-for-preview-releases-on-slicer-packages-kitware-com/31305 "2023-08-23T03:18:58Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![jcfr](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/jcfr/32/17825_2.png) [@jcfr](https://discourse.slicer.org/u/jcfr)\
**Post date:** [August 23, 2023, 3:18am UTC](https://discourse.slicer.org/t/retention-policy-for-preview-releases-on-slicer-packages-kitware-com/31305/1 "2023-08-23T03:18:59Z")

</div>

**Overview**

As of August 22nd 2023, we host 292 Preview releases on our server (`slicer-packages.kitware.com`).

Note that `Preview` release are different from `Stable` releases. Stable releases will never be removed.

This is roughly equivalent to:

- 880 application installers (`292 revisions * 3 operating systems`)
- 150k extension packages (`292 revisions * 3 operating systems * 177 extensions`)
- Totaling ~800GB (one preview release ~900MB)

**Retention Policy:**

We plan to keep about 180 Preview releases (roughly 6 months’ worth).

**Removal Plan:**

At 9pm EST daily:

- Remove 10 oldest Previews until 180 left
- Then, remove one daily.