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address code review comments on 5e3aeb5f8e 

- reduce string copying in Compaction::Summary
- simplify file number checking in UniversalCompactionStopStyleSimilarSize unit test
This commit is contained in:
Mike Lin 2014-01-25 14:12:24 -08:00
parent 5e3aeb5f8e
commit af7838de36
2 changed files with 21 additions and 22 deletions
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32
db/compaction.cc
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@ -194,7 +194,7 @@ static void FileSizeSummary(unsigned long long sz, char* output, int len) {
}
}
static void InputSummary(std::vector<FileMetaData*>& files, char* output,
static int InputSummary(std::vector<FileMetaData*>& files, char* output,
int len) {
int write = 0;
for (unsigned int i = 0; i < files.size(); i++) {
@ -209,29 +209,37 @@ static void InputSummary(std::vector<FileMetaData*>& files, char* output,
break;
write += ret;
}
return write;
}
void Compaction::Summary(char* output, int len) {
int write = snprintf(output, len,
"Base version %lu Base level %d, seek compaction:%d, inputs:",
"Base version %lu Base level %d, seek compaction:%d, inputs: [",
(unsigned long)input_version_->GetVersionNumber(),
level_,
seek_compaction_);
if (write < 0 || write > len) {
if (write < 0 || write >= len) {
return;
}
char level_low_summary[1024];
InputSummary(inputs_[0], level_low_summary, sizeof(level_low_summary));
char level_up_summary[1024];
if (inputs_[1].size()) {
InputSummary(inputs_[1], level_up_summary, sizeof(level_up_summary));
} else {
level_up_summary[0] = '\0';
write += InputSummary(inputs_[0], output+write, len-write);
if (write < 0 || write >= len) {
return;
}
snprintf(output + write, len - write, "[%s],[%s]",
level_low_summary, level_up_summary);
write += snprintf(output+write, len-write, "],[");
if (write < 0 || write >= len) {
return;
}
if (inputs_[1].size()) {
write += InputSummary(inputs_[1], output+write, len-write);
}
if (write < 0 || write >= len) {
return;
}
snprintf(output+write, len-write, "]");
}
} // namespace rocksdb

11
db/db_test.cc
View File

@ -2051,6 +2051,7 @@ TEST(DBTest, UniversalCompactionStopStyleSimilarSize) {
options.level0_file_num_compaction_trigger = 4;
options.compaction_options_universal.size_ratio = 10;
options.compaction_options_universal.stop_style = kCompactionStopStyleSimilarSize;
options.num_levels=1;
Reopen(&options);
Random rnd(301);
@ -2082,9 +2083,6 @@ TEST(DBTest, UniversalCompactionStopStyleSimilarSize) {
// (level0_file_num_compaction_trigger+1)=4 files and should have a big
// file of size 4.
ASSERT_EQ(NumTableFilesAtLevel(0), 1);
for (int i = 1; i < options.num_levels ; i++) {
ASSERT_EQ(NumTableFilesAtLevel(i), 0);
}
// Stage 2:
// Now we have one file at level 0, with size 4. We also have some data in
@ -2116,10 +2114,6 @@ TEST(DBTest, UniversalCompactionStopStyleSimilarSize) {
// Before compaction, we have 4 files at level 0, with size 4, 0.4, 1, 1.
// After compaction, we should have 3 files, with size 4, 0.4, 2.
ASSERT_EQ(NumTableFilesAtLevel(0), 3);
for (int i = 1; i < options.num_levels ; i++) {
ASSERT_EQ(NumTableFilesAtLevel(i), 0);
}
// Stage 3:
// Now we have 3 files at level 0, with size 4, 0.4, 2. Generate one
// more file at level-0, which should trigger level-0 compaction.
@ -2130,9 +2124,6 @@ TEST(DBTest, UniversalCompactionStopStyleSimilarSize) {
dbfull()->TEST_WaitForCompact();
// Level-0 compaction is triggered, but no file will be picked up.
ASSERT_EQ(NumTableFilesAtLevel(0), 4);
for (int i = 1; i < options.num_levels ; i++) {
ASSERT_EQ(NumTableFilesAtLevel(i), 0);
}
}
#if defined(SNAPPY) && defined(ZLIB) && defined(BZIP2)