db_stress: cover approximate size (#6213)

Summary:
db_stress to execute DB::GetApproximateSizes() with randomized keys and options. Return value is not validated but error will be reported.
Two ways to generate the range keys: (1) two random keys; (2) a small range.
Pull Request resolved: https://github.com/facebook/rocksdb/pull/6213

Test Plan: (1) run "make crash_test" for a while; (2) hack the code to ingest some errors to see it is reported.

Differential Revision: D19204665

fbshipit-source-id: 652db36f13bcb5a3bd8fe4a10c0aa22a77a0bce2
main
sdong 5 years ago committed by Facebook Github Bot
parent 3160edfdc7
commit 79cc8dc29b
  1. 1
      db_stress_tool/db_stress_common.h
  2. 4
      db_stress_tool/db_stress_gflags.cc
  3. 53
      db_stress_tool/db_stress_test_base.cc
  4. 7
      db_stress_tool/db_stress_test_base.h

@ -225,6 +225,7 @@ DECLARE_uint64(blob_db_file_size);
DECLARE_bool(blob_db_enable_gc);
DECLARE_double(blob_db_gc_cutoff);
#endif // !ROCKSDB_LITE
DECLARE_int32(approximate_size_one_in);
const long KB = 1024;
const int kRandomValueMaxFactor = 3;

@ -636,4 +636,8 @@ DEFINE_int32(verify_db_one_in, 0,
DEFINE_int32(continuous_verification_interval, 1000,
"While test is running, verify db every N milliseconds. 0 "
"disables continuous verification.");
DEFINE_int32(approximate_size_one_in, 64,
"If non-zero, DB::GetApproximateSizes() will be called against"
" random key ranges.");
#endif // GFLAGS

@ -630,6 +630,15 @@ void StressTest::OperateDb(ThreadState* thread) {
}
}
#ifndef ROCKSDB_LITE
if (thread->rand.OneInOpt(FLAGS_approximate_size_one_in)) {
Status s =
TestApproximateSize(thread, i, rand_column_families, rand_keys);
if (!s.ok()) {
VerificationAbort(shared, "ApproximateSize Failed", s);
}
}
#endif // !ROCKSDB_LITE
if (thread->rand.OneInOpt(FLAGS_acquire_snapshot_one_in)) {
TestAcquireSnapshot(thread, rand_column_family, keystr, i);
}
@ -1205,6 +1214,50 @@ Status StressTest::TestBackupRestore(
return s;
}
#ifndef ROCKSDB_LITE
Status StressTest::TestApproximateSize(
ThreadState* thread, uint64_t iteration,
const std::vector<int>& rand_column_families,
const std::vector<int64_t>& rand_keys) {
// rand_keys likely only has one key. Just use the first one.
assert(!rand_keys.empty());
assert(!rand_column_families.empty());
int64_t key1 = rand_keys[0];
int64_t key2;
if (thread->rand.OneIn(2)) {
// Two totally random keys. This tends to cover large ranges.
key2 = GenerateOneKey(thread, iteration);
if (key2 < key1) {
std::swap(key1, key2);
}
} else {
// Unless users pass a very large FLAGS_max_key, it we should not worry
// about overflow. It is for testing, so we skip the overflow checking
// for simplicity.
key2 = key1 + static_cast<int64_t>(thread->rand.Uniform(1000));
}
std::string key1_str = Key(key1);
std::string key2_str = Key(key2);
Range range{Slice(key1_str), Slice(key2_str)};
SizeApproximationOptions sao;
sao.include_memtabtles = thread->rand.OneIn(2);
if (sao.include_memtabtles) {
sao.include_files = thread->rand.OneIn(2);
}
if (thread->rand.OneIn(2)) {
if (thread->rand.OneIn(2)) {
sao.files_size_error_margin = 0.0;
} else {
sao.files_size_error_margin =
static_cast<double>(thread->rand.Uniform(3));
}
}
uint64_t result;
return db_->GetApproximateSizes(
sao, column_families_[rand_column_families[0]], &range, 1, &result);
}
#endif // ROCKSDB_LITE
Status StressTest::TestCheckpoint(ThreadState* thread,
const std::vector<int>& rand_column_families,
const std::vector<int64_t>& rand_keys) {

@ -183,7 +183,12 @@ class StressTest {
Status MaybeReleaseSnapshots(ThreadState* thread, uint64_t i);
#ifndef ROCKSDB_LITE
Status VerifyGetLiveAndWalFiles(ThreadState* thread);
#endif // !ROCKSDB_LITE
virtual Status TestApproximateSize(
ThreadState* thread, uint64_t iteration,
const std::vector<int>& rand_column_families,
const std::vector<int64_t>& rand_keys);
#endif // !ROCKSDB_LITE
void VerificationAbort(SharedState* shared, std::string msg, Status s) const;
void VerificationAbort(SharedState* shared, std::string msg, int cf,

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