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From 64943f95a11adc2f97f4998b36091fcf6029f35b Mon Sep 17 00:00:00 2001
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From: Yehuda Sadeh <yehuda@inktank.com>
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Date: Mon, 2 Jul 2012 14:29:06 -0700
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Subject: [PATCH 3/6] bloom_test failure on big endian archs
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When running bloom_test on big endian machines it fails due to unacceptable
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false positive rate. I've looked into the issue and it seems that the
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reason for that is that it passes a different input than when it runs on
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little endian. When transforming the input to be little endian it behaves
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as expected.
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This issue holds up inclusion of ceph to debian due to ceph's use of
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leveldb. The fix can be to bump up the acceptable false positives.
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https://groups.google.com/d/topic/leveldb/SbVPvl4j4vU/discussion
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---
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util/bloom_test.cc | 2 +-
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1 file changed, 1 insertion(+), 1 deletion(-)
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diff --git a/util/bloom_test.cc b/util/bloom_test.cc
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index 0bf8e8d..7593cc2 100644
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--- a/util/bloom_test.cc
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+++ b/util/bloom_test.cc
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@@ -140,7 +140,7 @@ TEST(BloomTest, VaryingLengths) {
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fprintf(stderr, "False positives: %5.2f%% @ length = %6d ; bytes = %6d\n",
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rate*100.0, length, static_cast<int>(FilterSize()));
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}
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- ASSERT_LE(rate, 0.02); // Must not be over 2%
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+ ASSERT_LE(rate, 0.03); // Must not be over 2%
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if (rate > 0.0125) mediocre_filters++; // Allowed, but not too often
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else good_filters++;
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}
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--
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1.8.3.1
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