From 1eae205e7d941d6a6554be4231362555c1891cea Mon Sep 17 00:00:00 2001
From: Menno van Leeuwen <menno@vleeuwen.me>
Date: Tue, 24 Jun 2025 11:06:24 +0200
Subject: [PATCH] Optimize JuiceFS performance settings and mount options

The changes tune TCP buffers and enhance JuiceFS mount options for
better throughput and caching behavior.
---
 config/ansible/tasks/servers/juicefs.yml    | 16 +++++++++++++++-
 config/ansible/templates/juicefs.service.j2 | 14 +++++++++++++-
 2 files changed, 28 insertions(+), 2 deletions(-)

diff --git a/config/ansible/tasks/servers/juicefs.yml b/config/ansible/tasks/servers/juicefs.yml
index ba9d3a1..de42c1f 100644
--- a/config/ansible/tasks/servers/juicefs.yml
+++ b/config/ansible/tasks/servers/juicefs.yml
@@ -31,10 +31,24 @@
     mode: "0755"
   become: true
 
+- name: Configure JuiceFS network performance optimizations
+  ansible.builtin.sysctl:
+    name: "{{ item.name }}"
+    value: "{{ item.value }}"
+    state: present
+    reload: true
+  become: true
+  loop:
+    - { name: "net.core.rmem_max", value: "16777216" }
+    - { name: "net.core.wmem_max", value: "16777216" }
+    - { name: "net.ipv4.tcp_rmem", value: "4096 87380 16777216" }
+    - { name: "net.ipv4.tcp_wmem", value: "4096 65536 16777216" }
+
 - name: Set JuiceFS facts
   ansible.builtin.set_fact:
     hetzner_access_key: "{{ lookup('community.general.onepassword', 'mfk2qgnaplgtk6xmfc3r6w6neq', vault='j7nmhqlsjmp2r6umly5t75hzb4', field='AWS_ACCESS_KEY_ID') }}"
-    hetzner_secret_key: "{{ lookup('community.general.onepassword', 'mfk2qgnaplgtk6xmfc3r6w6neq', vault='j7nmhqlsjmp2r6umly5t75hzb4', field='AWS_SECRET_ACCESS_KEY')
+    hetzner_secret_key:
+      "{{ lookup('community.general.onepassword', 'mfk2qgnaplgtk6xmfc3r6w6neq', vault='j7nmhqlsjmp2r6umly5t75hzb4', field='AWS_SECRET_ACCESS_KEY')
       }}"
     redis_password: "{{ lookup('community.general.onepassword', '4cioblm633bdkl6put35lk6ql4', vault='j7nmhqlsjmp2r6umly5t75hzb4', field='password') }}"
 
diff --git a/config/ansible/templates/juicefs.service.j2 b/config/ansible/templates/juicefs.service.j2
index a13d071..a6d9fe7 100644
--- a/config/ansible/templates/juicefs.service.j2
+++ b/config/ansible/templates/juicefs.service.j2
@@ -5,7 +5,19 @@ Before=docker.service
 
 [Service]
 Type=simple
-ExecStart=/usr/local/bin/juicefs mount redis://:{{ redis_password }}@localhost:6379/0 /mnt/object_storage --cache-dir=/var/jfsCache --buffer-size=1024 --prefetch=4 --cache-size=131072 --attr-cache=3 --entry-cache=3 --open-cache=3
+ExecStart=/usr/local/bin/juicefs mount redis://:{{ redis_password }}@localhost:6379/0 /mnt/object_storage \
+  --cache-dir=/var/jfsCache \
+  --buffer-size=4096 \
+  --prefetch=16 \
+  --cache-size=131072 \
+  --attr-cache=4 \
+  --entry-cache=4 \
+  --open-cache=4 \
+  -o writeback_cache \
+  --max-uploads=80 \
+  --max-deletes=80 \
+  --writeback \
+  --upload-delay=30s
 Restart=on-failure
 
 [Install]