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added group commit; drastically speeds up mult-threaded synchronous write workloads

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This commit is contained in:
Sanjay Ghemawat
2012-03-08 16:23:21 -08:00
parent 015d26f8be
commit d79762e273
5 changed files with 162 additions and 49 deletions
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31
db/write_batch_test.cc
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@@ -18,6 +18,7 @@ static std::string PrintContents(WriteBatch* b) {
mem->Ref();
std::string state;
Status s = WriteBatchInternal::InsertInto(b, mem);
int count = 0;
Iterator* iter = mem->NewIterator();
for (iter->SeekToFirst(); iter->Valid(); iter->Next()) {
ParsedInternalKey ikey;
@@ -29,11 +30,13 @@ static std::string PrintContents(WriteBatch* b) {
state.append(", ");
state.append(iter->value().ToString());
state.append(")");
count++;
break;
case kTypeDeletion:
state.append("Delete(");
state.append(ikey.user_key.ToString());
state.append(")");
count++;
break;
}
state.append("@");
@@ -42,6 +45,8 @@ static std::string PrintContents(WriteBatch* b) {
delete iter;
if (!s.ok()) {
state.append("ParseError()");
} else if (count != WriteBatchInternal::Count(b)) {
state.append("CountMismatch()");
}
mem->Unref();
return state;
@@ -82,6 +87,32 @@ TEST(WriteBatchTest, Corruption) {
PrintContents(&batch));
}
TEST(WriteBatchTest, Append) {
WriteBatch b1, b2;
WriteBatchInternal::SetSequence(&b1, 200);
WriteBatchInternal::SetSequence(&b2, 300);
WriteBatchInternal::Append(&b1, &b2);
ASSERT_EQ("",
PrintContents(&b1));
b2.Put("a", "va");
WriteBatchInternal::Append(&b1, &b2);
ASSERT_EQ("Put(a, va)@200",
PrintContents(&b1));
b2.Clear();
b2.Put("b", "vb");
WriteBatchInternal::Append(&b1, &b2);
ASSERT_EQ("Put(a, va)@200"
"Put(b, vb)@201",
PrintContents(&b1));
b2.Delete("foo");
WriteBatchInternal::Append(&b1, &b2);
ASSERT_EQ("Put(a, va)@200"
"Put(b, vb)@202"
"Put(b, vb)@201"
"Delete(foo)@203",
PrintContents(&b1));
}
} // namespace leveldb
int main(int argc, char** argv) {