From: Sage Weil <sage@inktank.com>
Date: Mon, 29 Apr 2013 22:01:05 +0000 (-0700)
Subject: leveldb: add compact_prefix method
X-Git-Tag: v0.61~32^2~4
X-Git-Url: http://git-server-git.apps.pok.os.sepia.ceph.com/?a=commitdiff_plain;h=a2f7d1d1f15831c48f0b934d9c25ea8b0c1737d4;p=ceph.git

leveldb: add compact_prefix method

Signed-off-by: Sage Weil <sage@inktank.com>
---

diff --git a/src/os/LevelDBStore.h b/src/os/LevelDBStore.h
index 9f8cd52ca9c7..83f2ed3b4c45 100644
--- a/src/os/LevelDBStore.h
+++ b/src/os/LevelDBStore.h
@@ -38,6 +38,17 @@ public:
     db->CompactRange(NULL, NULL);
   }
 
+  /// compact leveldb for all keys with a given prefix
+  void compact_prefix(const string& prefix) {
+    // if we combine the prefix with key by adding a '\0' separator,
+    // a char(1) will capture all such keys.
+    string end = prefix;
+    end += (char)1;
+    leveldb::Slice cstart(prefix);
+    leveldb::Slice cend(end);
+    db->CompactRange(&cstart, &cend);
+  }
+
   /**
    * options_t: Holds options which are minimally interpreted
    * on initialization and then passed through to LevelDB.