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1 From: Yehuda Sadeh <yehuda@inktank.com>
2 Date: Mon, 2 Jul 2012 14:29:06 -0700
3 Subject: [PATCH] bloom_test failure on big endian archs
4
5 When running bloom_test on big endian machines it fails due to unacceptable
6 false positive rate. I've looked into the issue and it seems that the
7 reason for that is that it passes a different input than when it runs on
8 little endian. When transforming the input to be little endian it behaves
9 as expected.
10 This issue holds up inclusion of ceph to debian due to ceph's use of
11 leveldb. The fix can be to bump up the acceptable false positives.
12
13 https://groups.google.com/d/topic/leveldb/SbVPvl4j4vU/discussion
14
15 diff --git a/util/bloom_test.cc b/util/bloom_test.cc
16 index 520473e..e4053e6 100644
17 --- a/util/bloom_test.cc
18 +++ b/util/bloom_test.cc
19 @@ -136,7 +136,7 @@ TEST_F(BloomTest, VaryingLengths) {
20 "False positives: %5.2f%% @ length = %6d ; bytes = %6d\n",
21 rate * 100.0, length, static_cast<int>(FilterSize()));
22 }
23 - ASSERT_LE(rate, 0.02); // Must not be over 2%
24 + ASSERT_LE(rate, 0.03); // Must not be over 3%
25 if (rate > 0.0125)
26 mediocre_filters++; // Allowed, but not too often
27 else
|
