From: Piotr Dałek <piotr.dalek@ts.fujitsu.com>
Date: Fri, 23 Oct 2015 13:46:20 +0000 (+0200)
Subject: mon/MonitorDBStore: use single-key LevelDB::get() method
X-Git-Tag: v10.0.1~116^2~3
X-Git-Url: http://git-server-git.apps.pok.os.sepia.ceph.com/?a=commitdiff_plain;h=66b7b920cf5a0a9c71212573ef47fb2c7ea9b5ff;p=ceph.git

mon/MonitorDBStore: use single-key LevelDB::get() method

Make MonitorDBStore use single-key ::get() method for some performance
increase in heavy K/V workloads.

Signed-off-by: Piotr Dałek <piotr.dalek@ts.fujitsu.com>
---

diff --git a/src/mon/MonitorDBStore.h b/src/mon/MonitorDBStore.h
index 15558e3da986..b9b0ee54c938 100644
--- a/src/mon/MonitorDBStore.h
+++ b/src/mon/MonitorDBStore.h
@@ -507,14 +507,12 @@ class MonitorDBStore
   }
 
   int get(const string& prefix, const string& key, bufferlist& bl) {
-    set<string> k;
-    k.insert(key);
-    map<string,bufferlist> out;
-
-    db->get(prefix, k, &out);
-    if (out.empty())
+    
+    bufferlist outbl;
+    db->get(prefix, key, &outbl);
+    if (outbl.length() == 0) 
       return -ENOENT;
-    bl.append(out[key]);
+    bl.append(outbl);
 
     return 0;
   }