From: Yan, Zheng <zheng.z.yan@intel.com>
Date: Wed, 2 Apr 2014 01:33:37 +0000 (+0800)
Subject: mds: initialize bloom filter according to dirfrag size
X-Git-Tag: v0.79~26^2~1
X-Git-Url: http://git-server-git.apps.pok.os.sepia.ceph.com/?a=commitdiff_plain;h=5a9b99aa9188bff74b59adb3d55cbb7f27343765;p=ceph.git

mds: initialize bloom filter according to dirfrag size

Signed-off-by: Yan, Zheng <zheng.z.yan@intel.com>
---

diff --git a/src/mds/CDir.cc b/src/mds/CDir.cc
index 6e93ec5ecea7..10189773caf2 100644
--- a/src/mds/CDir.cc
+++ b/src/mds/CDir.cc
@@ -616,7 +616,9 @@ void CDir::add_to_bloom(CDentry *dn)
     /* not create bloom filter for incomplete dir that was added by log replay */
     if (!is_complete())
       return;
-    bloom = new bloom_filter(100, 0.05, 0);
+    unsigned size = get_num_head_items() + get_num_snap_items();
+    if (size < 100) size = 100;
+    bloom = new bloom_filter(size, 1.0 / size, 0);
   }
   /* This size and false positive probability is completely random.*/
   bloom->insert(dn->name.c_str(), dn->name.size());