Improve Syncthing performance

configuration.nix

@@ -94,8 +94,12 @@ with pkgs;
   # Keep logs for a week
   services.journald.extraConfig = "MaxRetentionSec=1week";
 
-  # Increase inotify limits
-  boot.kernel.sysctl = { "fs.inotify.max_user_watches" = 204800; };
+  # Increase inotify limits and maximum buffer size
+  boot.kernel.sysctl = {
+    "fs.inotify.max_user_watches" = 204800;
+    "net.core.rmem_max" = 2500000;
+    "net.core.wmem_max" = 2500000;
+  };
 
   # MOTD message
   programs.fish.interactiveShellInit = "${./scripts/motd.sh}";

modules/datasync.nix

@@ -7,13 +7,19 @@
     guiAddress = "0.0.0.0:8384";
     dataDir = "/vault/syncthing";
     key = config.age.secrets.syncthing.path;
-    extraOptions = { options.maxFolderConcurrency = 1; };
     devices = {
       panacea.id =
         "NF4SYEJ-RSGPDEF-CDEYC3A-JWZMKNC-KG4FVQP-CZ5HRFY-XM22BZD-N7B6VAH";
       caravanserai.id =
         "MIRF73R-S7AV47R-VLWZUK2-TFCVQPV-FRYCPND-Y4VR3W2-ZAIQXZD-JAEQCAD";
     };
+    extraOptions = {
+      options = {
+        maxFolderConcurrency = 4;
+        progressUpdateIntervalS = -1;
+        caseSensitiveFS = true;
+      };
+    };
     folders = {
       Documents = {
         id = "wusdj-bfjkr";

modules/periodic.nix

@@ -47,20 +47,6 @@ in {
     };
   };
 
-  # Idle HDDs when not used
-  systemd.services.hd-idle = {
-    description = "Idle HDDs when not in use";
-    wantedBy = [ "default.target" ];
-    path = with pkgs; [ hd-idle ];
-    script = ''
-      ${pkgs.hd-idle}/bin/hd-idle -i 0 -a ata-ST1000LM035-1RK172_WKPAKV85 -i 600
-      -a ata-HGST_HTS721010A9E630_JR100X6P3UJG5E -i 600
-    '';
-    serviceConfig.Type = "simple";
-    requires = [ "sata-hat.service" ];
-    after = [ "vault.mount" ];
-  };
-
   # Push zion changes to git daily
   systemd.user.services.zion-push = {
     description = "Push zion changes to git";