nadder: Decrease scheduler queue depth to improve latency

diff --git a/roles/nadder-01.rb b/roles/nadder-01.rb
index 8eb9d562f795979775ab8606f8e957d3bee08f43..d596a1a6e54f849a87ea8f3befc071ce1041dad0 100644 (file)
--- a/roles/nadder-01.rb
+++ b/roles/nadder-01.rb
@@ -18,8 +18,8 @@ default_attributes(
     :hdd_tune => {
       :comment => "Tune the queue for improved performance",
       :parameters => {
     :hdd_tune => {
       :comment => "Tune the queue for improved performance",
       :parameters => {

-        "block/vda/queue/nr_requests" => "512",
-        "block/vdb/queue/nr_requests" => "512",
+        "block/vda/queue/nr_requests" => "64",
+        "block/vdb/queue/nr_requests" => "64",

         "block/vda/queue/scheduler" => "deadline",
         "block/vdb/queue/scheduler" => "deadline"
       }
         "block/vda/queue/scheduler" => "deadline",
         "block/vdb/queue/scheduler" => "deadline"
       }

diff --git a/roles/nadder-02.rb b/roles/nadder-02.rb
index 9141e2a73c0c72d7c03deac94be01dd2aaf01eb4..07c2c71457fcb2468cfc76d305cef40ca2c0e165 100644 (file)
--- a/roles/nadder-02.rb
+++ b/roles/nadder-02.rb
@@ -18,8 +18,8 @@ default_attributes(
     :hdd_tune => {
       :comment => "Tune the queue for improved performance",
       :parameters => {
     :hdd_tune => {
       :comment => "Tune the queue for improved performance",
       :parameters => {

-        "block/vda/queue/nr_requests" => "512",
-        "block/vdb/queue/nr_requests" => "512",
+        "block/vda/queue/nr_requests" => "64",
+        "block/vdb/queue/nr_requests" => "64",

         "block/vda/queue/scheduler" => "deadline",
         "block/vdb/queue/scheduler" => "deadline"
       }
         "block/vda/queue/scheduler" => "deadline",
         "block/vdb/queue/scheduler" => "deadline"
       }