From: Grant Slater <git@firefishy.com>
Date: Mon, 5 Aug 2013 12:08:45 +0000 (+0100)
Subject: ridgeback: Tune md sync performance so as not to kill system performance
X-Git-Url: https://git.openstreetmap.org/chef.git/commitdiff_plain/4130a70bbd55a2931a3d02ce924f8d717c0af248?ds=sidebyside

ridgeback: Tune md sync performance so as not to kill system performance
---

diff --git a/roles/ridgeback.rb b/roles/ridgeback.rb
index cd992b20f..54e0d7e91 100644
--- a/roles/ridgeback.rb
+++ b/roles/ridgeback.rb
@@ -14,6 +14,17 @@ default_attributes(
       }
     }
   },
+  :sysfs => {
+    :md_tune => {
+      :comment => "Tune the md sync performance so as not to kill system performance",
+      :parameters => {
+        "block/md0/md/sync_speed_min" => "10",
+        "block/md0/md/sync_speed_max" => "10000",
+        "block/md1/md/sync_speed_min" => "10",
+        "block/md1/md/sync_speed_max" => "10000"
+      }
+    }
+  },
   :squid => {
     :cache_mem => "5500 MB",
     :cache_dir => "coss /store/squid/coss-01 128000 block-size=8192 max-size=262144 membufs=80"