From 10937c93d42dc8feec0930681d910ab0282e47ff Mon Sep 17 00:00:00 2001
From: colin <colin@uninsane.org>
Date: Sun, 12 Jun 2022 15:26:33 -0700
Subject: [PATCH] duplicity: attempt to limit bandwidth

---
 modules/services/duplicity.nix | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/modules/services/duplicity.nix b/modules/services/duplicity.nix
index af1e99bc..7c6c2d78 100644
--- a/modules/services/duplicity.nix
+++ b/modules/services/duplicity.nix
@@ -58,5 +58,15 @@ in
     # set this for the FIRST backup, then remove it to enable incremental backups
     #   (that the first backup *isn't* full i think is a defect)
     # services.duplicity.fullIfOlderThan = "always";
+
+    systemd.services.duplicity.serviceConfig = {
+      # rate-limit the read bandwidth in an effort to thereby prevent net upload saturation
+      # this could perhaps be done better by adding a duplicity config option to replace the binary with `trickle`
+      IOReadBandwidthMax = [
+        "/dev/sda1 5M"
+        "/dev/nvme0n1 5M"
+        "/dev/mmc0 5M"
+      ];
+    };
   };
 }