backend: rely on Array#shuffle instead sort_by { rand }

This is easier-to-read and more correct.  This is not available
in 1.8.6, but we already broke 1.8.6 compatibility with
String#bytesize.

1 files changed, 1 insertions, 1 deletions

diff --git a/lib/mogilefs/backend.rb b/lib/mogilefs/backend.rb
index 0ab2d4a..973d82b 100644
--- a/lib/mogilefs/backend.rb
+++ b/lib/mogilefs/backend.rb
@@ -221,7 +221,7 @@ class MogileFS::Backend
 
     now = Time.now
 
-    @hosts.sort_by { rand(3) - 1 }.each do |host|
+    @hosts.shuffle.each do |host|
       next if @dead.include? host and @dead[host] > now - 5
 
       begin