From 443673b515e837ed422818e403b59b32717cf8a2 Mon Sep 17 00:00:00 2001
From: Michael Reuter <mareuter@lsst.org>
Date: Tue, 23 Jul 2024 17:38:08 -0700
Subject: [PATCH] First draft.

---
 .../Supporting-Infrastructure/index.rst       | 80 +++++++++++++++++++
 System-Architecture/index.rst                 |  1 +
 2 files changed, 81 insertions(+)
 create mode 100644 System-Architecture/Supporting-Infrastructure/index.rst

diff --git a/System-Architecture/Supporting-Infrastructure/index.rst b/System-Architecture/Supporting-Infrastructure/index.rst
new file mode 100644
index 0000000..0c9b464
--- /dev/null
+++ b/System-Architecture/Supporting-Infrastructure/index.rst
@@ -0,0 +1,80 @@
+.. _System-Architecture-Supporting-Infrastructure:
+
+#########################
+Supporting Infrastructure
+#########################
+
+Storage Retention Policies
+^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+Summit
+------
+
+.. list-table:: Retention Policies
+   :widths: auto
+   :header-rows: 1
+
+   * - Content
+     - Retention (days)
+     - Provider
+     - Server
+   * - AuxTel Raw Images (Butler)
+     - 90
+     - Ceph NFS
+     - yagan
+   * - AuxTel Quicklook Images (Butler)
+     - ?? (90)
+     - Ceph NFS
+     - yagan
+   * - Large File Annex
+     - 30
+     - Ceph S3
+     - chonchon
+   * - RubinTV Products
+     - ??
+     - Ceph S3
+     - chonchon
+   * - ComCam Raw Images (Butler)
+     - 90
+     - NFS
+     - comcam-archiver
+   * - ComCam Quicklook Images (Butler)
+     - ?? (90)
+     - NFS
+     - comcam-archiver
+   * - LSSTCam Raw Images (Butler)
+     - ??
+     - Ceph NFS
+     - chonchon
+   * - LSSTCam Quicklook Images (Butler)
+     - ??
+     - Ceph NFS
+     - chonchon
+   * - LSSTCam Raw Images (Butler)
+     - 30
+     - Ceph S3
+     - new cluster
+   * - LSSTCam Quicklook Images (Butler)
+     - ?? (30)
+     - Ceph S3
+     - new cluster
+   * - DREAM Products
+     - ??
+     - Ceph S3
+     - new cluster
+   * - EFD
+     - 30
+     - Ceph PVC
+     - yagan
+
+Notes:
+  * Quicklook images are generated by Rapid Analysis.
+  * Butler retentions are shared, but independent application is in progress.
+  * The Ceph S3 on the new cluster entries are for future reference. System is currently not ready for use.
+Open issues: 
+  * All retention policies should be reviewed for relevance.
+  * Anything with ?? needs a decision.
+  * Is DREAM going to store any products when the new cluster is available?
+  * Since calibration products are absolved from deletion, they will accumulate over time. How do we decide when and/or if to purge?
+  * User data products in the butler are not covered by a retention policy. Should they?
+  * Ceph NFS for LSSTCam and ComCam will have to be shared so will greatly influence the retention duration
diff --git a/System-Architecture/index.rst b/System-Architecture/index.rst
index 4ac71e8..472d4e0 100644
--- a/System-Architecture/index.rst
+++ b/System-Architecture/index.rst
@@ -26,6 +26,7 @@ These are generally grouped according to their association with a specific teles
 
     Control-Packages/*
     CSC-Overview/*
+    Supporting-Infrastructure/*
 
 There exist multiple components for which documentation is not yet available including: the EFD, configuration management, deployment, and the scriptQueue.