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mds: initialize bloom filter according to dirfrag size

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Signed-off-by: Yan, Zheng <zheng.z.yan@intel.com>
This commit is contained in:
Yan, Zheng 2014-04-02 09:33:37 +08:00
parent 16af25fba3
commit 5a9b99aa91
1 changed files with 3 additions and 1 deletions

4
src/mds/CDir.cc
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@ -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());