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rocksdb/db/version_edit.cc
Cheng Chang e931bbfec0 Make it able to ignore WAL related VersionEdits in older versions (#7873) 
Summary:
Although the tags for `WalAddition`, `WalDeletion` are after `kTagSafeIgnoreMask`, to actually be able to skip these entries in older versions of RocksDB, we require that they are encoded with their encoded size as the prefix. This requirement is not met in the current codebase, so a downgraded DB may fail to open if these entries exist in the MANIFEST.

If a DB wants to downgrade, and its MANIFEST contains `WalAddition` or `WalDeletion`, it can set `track_and_verify_wals_in_manifest` to `false`, then restart twice, then downgrade. On the first restart, a new MANIFEST will be created with a `WalDeletion` indicating that all previously tracked WALs are removed from MANIFEST. On the second restart, since there is  no tracked WALs in MANIFEST now, a new MANIFEST will be created with neither `WalAddition` nor `WalDeletion`. Then the DB can downgrade.

Tags for `BlobFileAddition`, `BlobFileGarbage` also have the same problem, but this PR focuses on solving the problem for WAL edits.

Pull Request resolved: https://github.com/facebook/rocksdb/pull/7873

Test Plan: Added a `VersionEditTest::IgnorableTags` unit test to verify all entries with tags larger than `kTagSafeIgnoreMask` can actually be skipped and won't affect parsing of other entries.

Reviewed By: ajkr

Differential Revision: D25935930

Pulled By: cheng-chang

fbshipit-source-id: 7a02fdba4311d6084328c14aed110a26d08c3efb
2021-01-20 08:34:52 -08:00

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// Copyright (c) 2011-present, Facebook, Inc. All rights reserved.
// This source code is licensed under both the GPLv2 (found in the
// COPYING file in the root directory) and Apache 2.0 License
// (found in the LICENSE.Apache file in the root directory).
//
// Copyright (c) 2011 The LevelDB Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file. See the AUTHORS file for names of contributors.
#include "db/version_edit.h"
#include "db/blob/blob_index.h"
#include "db/version_set.h"
#include "logging/event_logger.h"
#include "rocksdb/slice.h"
#include "test_util/sync_point.h"
#include "util/coding.h"
#include "util/string_util.h"
namespace ROCKSDB_NAMESPACE {
namespace {
} // anonymous namespace
uint64_t PackFileNumberAndPathId(uint64_t number, uint64_t path_id) {
assert(number <= kFileNumberMask);
return number | (path_id * (kFileNumberMask + 1));
}
void FileMetaData::UpdateBoundaries(const Slice& key, const Slice& value,
SequenceNumber seqno,
ValueType value_type) {
if (smallest.size() == 0) {
smallest.DecodeFrom(key);
}
largest.DecodeFrom(key);
fd.smallest_seqno = std::min(fd.smallest_seqno, seqno);
fd.largest_seqno = std::max(fd.largest_seqno, seqno);
if (value_type == kTypeBlobIndex) {
BlobIndex blob_index;
const Status s = blob_index.DecodeFrom(value);
if (!s.ok()) {
return;
}
if (blob_index.IsInlined()) {
return;
}
if (blob_index.HasTTL()) {
return;
}
// Paranoid check: this should not happen because BlobDB numbers the blob
// files starting from 1.
if (blob_index.file_number() == kInvalidBlobFileNumber) {
return;
}
if (oldest_blob_file_number == kInvalidBlobFileNumber ||
oldest_blob_file_number > blob_index.file_number()) {
oldest_blob_file_number = blob_index.file_number();
}
}
}
void VersionEdit::Clear() {
max_level_ = 0;
db_id_.clear();
comparator_.clear();
log_number_ = 0;
prev_log_number_ = 0;
next_file_number_ = 0;
max_column_family_ = 0;
min_log_number_to_keep_ = 0;
last_sequence_ = 0;
has_db_id_ = false;
has_comparator_ = false;
has_log_number_ = false;
has_prev_log_number_ = false;
has_next_file_number_ = false;
has_max_column_family_ = false;
has_min_log_number_to_keep_ = false;
has_last_sequence_ = false;
deleted_files_.clear();
new_files_.clear();
blob_file_additions_.clear();
blob_file_garbages_.clear();
wal_additions_.clear();
wal_deletion_.Reset();
column_family_ = 0;
is_column_family_add_ = false;
is_column_family_drop_ = false;
column_family_name_.clear();
is_in_atomic_group_ = false;
remaining_entries_ = 0;
full_history_ts_low_.clear();
}
bool VersionEdit::EncodeTo(std::string* dst) const {
if (has_db_id_) {
PutVarint32(dst, kDbId);
PutLengthPrefixedSlice(dst, db_id_);
}
if (has_comparator_) {
PutVarint32(dst, kComparator);
PutLengthPrefixedSlice(dst, comparator_);
}
if (has_log_number_) {
PutVarint32Varint64(dst, kLogNumber, log_number_);
}
if (has_prev_log_number_) {
PutVarint32Varint64(dst, kPrevLogNumber, prev_log_number_);
}
if (has_next_file_number_) {
PutVarint32Varint64(dst, kNextFileNumber, next_file_number_);
}
if (has_max_column_family_) {
PutVarint32Varint32(dst, kMaxColumnFamily, max_column_family_);
}
if (has_last_sequence_) {
PutVarint32Varint64(dst, kLastSequence, last_sequence_);
}
for (const auto& deleted : deleted_files_) {
PutVarint32Varint32Varint64(dst, kDeletedFile, deleted.first /* level */,
deleted.second /* file number */);
}
bool min_log_num_written = false;
for (size_t i = 0; i < new_files_.size(); i++) {
const FileMetaData& f = new_files_[i].second;
if (!f.smallest.Valid() || !f.largest.Valid()) {
return false;
}
PutVarint32(dst, kNewFile4);
PutVarint32Varint64(dst, new_files_[i].first /* level */, f.fd.GetNumber());
PutVarint64(dst, f.fd.GetFileSize());
PutLengthPrefixedSlice(dst, f.smallest.Encode());
PutLengthPrefixedSlice(dst, f.largest.Encode());
PutVarint64Varint64(dst, f.fd.smallest_seqno, f.fd.largest_seqno);
// Customized fields' format:
// +-----------------------------+
// | 1st field's tag (varint32) |
// +-----------------------------+
// | 1st field's size (varint32) |
// +-----------------------------+
// | bytes for 1st field |
// | (based on size decoded) |
// +-----------------------------+
// | |
// | ...... |
// | |
// +-----------------------------+
// | last field's size (varint32)|
// +-----------------------------+
// | bytes for last field |
// | (based on size decoded) |
// +-----------------------------+
// | terminating tag (varint32) |
// +-----------------------------+
//
// Customized encoding for fields:
// tag kPathId: 1 byte as path_id
// tag kNeedCompaction:
// now only can take one char value 1 indicating need-compaction
//
PutVarint32(dst, NewFileCustomTag::kOldestAncesterTime);
std::string varint_oldest_ancester_time;
PutVarint64(&varint_oldest_ancester_time, f.oldest_ancester_time);
TEST_SYNC_POINT_CALLBACK("VersionEdit::EncodeTo:VarintOldestAncesterTime",
&varint_oldest_ancester_time);
PutLengthPrefixedSlice(dst, Slice(varint_oldest_ancester_time));
PutVarint32(dst, NewFileCustomTag::kFileCreationTime);
std::string varint_file_creation_time;
PutVarint64(&varint_file_creation_time, f.file_creation_time);
TEST_SYNC_POINT_CALLBACK("VersionEdit::EncodeTo:VarintFileCreationTime",
&varint_file_creation_time);
PutLengthPrefixedSlice(dst, Slice(varint_file_creation_time));
PutVarint32(dst, NewFileCustomTag::kFileChecksum);
PutLengthPrefixedSlice(dst, Slice(f.file_checksum));
PutVarint32(dst, NewFileCustomTag::kFileChecksumFuncName);
PutLengthPrefixedSlice(dst, Slice(f.file_checksum_func_name));
if (f.fd.GetPathId() != 0) {
PutVarint32(dst, NewFileCustomTag::kPathId);
char p = static_cast<char>(f.fd.GetPathId());
PutLengthPrefixedSlice(dst, Slice(&p, 1));
}
if (f.marked_for_compaction) {
PutVarint32(dst, NewFileCustomTag::kNeedCompaction);
char p = static_cast<char>(1);
PutLengthPrefixedSlice(dst, Slice(&p, 1));
}
if (has_min_log_number_to_keep_ && !min_log_num_written) {
PutVarint32(dst, NewFileCustomTag::kMinLogNumberToKeepHack);
std::string varint_log_number;
PutFixed64(&varint_log_number, min_log_number_to_keep_);
PutLengthPrefixedSlice(dst, Slice(varint_log_number));
min_log_num_written = true;
}
if (f.oldest_blob_file_number != kInvalidBlobFileNumber) {
PutVarint32(dst, NewFileCustomTag::kOldestBlobFileNumber);
std::string oldest_blob_file_number;
PutVarint64(&oldest_blob_file_number, f.oldest_blob_file_number);
PutLengthPrefixedSlice(dst, Slice(oldest_blob_file_number));
}
TEST_SYNC_POINT_CALLBACK("VersionEdit::EncodeTo:NewFile4:CustomizeFields",
dst);
PutVarint32(dst, NewFileCustomTag::kTerminate);
}
for (const auto& blob_file_addition : blob_file_additions_) {
PutVarint32(dst, kBlobFileAddition);
blob_file_addition.EncodeTo(dst);
}
for (const auto& blob_file_garbage : blob_file_garbages_) {
PutVarint32(dst, kBlobFileGarbage);
blob_file_garbage.EncodeTo(dst);
}
for (const auto& wal_addition : wal_additions_) {
PutVarint32(dst, kWalAddition2);
std::string encoded;
wal_addition.EncodeTo(&encoded);
PutLengthPrefixedSlice(dst, encoded);
}
if (!wal_deletion_.IsEmpty()) {
PutVarint32(dst, kWalDeletion2);
std::string encoded;
wal_deletion_.EncodeTo(&encoded);
PutLengthPrefixedSlice(dst, encoded);
}
// 0 is default and does not need to be explicitly written
if (column_family_ != 0) {
PutVarint32Varint32(dst, kColumnFamily, column_family_);
}
if (is_column_family_add_) {
PutVarint32(dst, kColumnFamilyAdd);
PutLengthPrefixedSlice(dst, Slice(column_family_name_));
}
if (is_column_family_drop_) {
PutVarint32(dst, kColumnFamilyDrop);
}
if (is_in_atomic_group_) {
PutVarint32(dst, kInAtomicGroup);
PutVarint32(dst, remaining_entries_);
}
if (HasFullHistoryTsLow()) {
PutVarint32(dst, kFullHistoryTsLow);
PutLengthPrefixedSlice(dst, full_history_ts_low_);
}
return true;
}
static bool GetInternalKey(Slice* input, InternalKey* dst) {
Slice str;
if (GetLengthPrefixedSlice(input, &str)) {
dst->DecodeFrom(str);
return dst->Valid();
} else {
return false;
}
}
bool VersionEdit::GetLevel(Slice* input, int* level, const char** /*msg*/) {
uint32_t v = 0;
if (GetVarint32(input, &v)) {
*level = v;
if (max_level_ < *level) {
max_level_ = *level;
}
return true;
} else {
return false;
}
}
const char* VersionEdit::DecodeNewFile4From(Slice* input) {
const char* msg = nullptr;
int level = 0;
FileMetaData f;
uint64_t number = 0;
uint32_t path_id = 0;
uint64_t file_size = 0;
SequenceNumber smallest_seqno = 0;
SequenceNumber largest_seqno = kMaxSequenceNumber;
if (GetLevel(input, &level, &msg) && GetVarint64(input, &number) &&
GetVarint64(input, &file_size) && GetInternalKey(input, &f.smallest) &&
GetInternalKey(input, &f.largest) &&
GetVarint64(input, &smallest_seqno) &&
GetVarint64(input, &largest_seqno)) {
// See comments in VersionEdit::EncodeTo() for format of customized fields
while (true) {
uint32_t custom_tag = 0;
Slice field;
if (!GetVarint32(input, &custom_tag)) {
return "new-file4 custom field";
}
if (custom_tag == kTerminate) {
break;
}
if (!GetLengthPrefixedSlice(input, &field)) {
return "new-file4 custom field length prefixed slice error";
}
switch (custom_tag) {
case kPathId:
if (field.size() != 1) {
return "path_id field wrong size";
}
path_id = field[0];
if (path_id > 3) {
return "path_id wrong vaue";
}
break;
case kOldestAncesterTime:
if (!GetVarint64(&field, &f.oldest_ancester_time)) {
return "invalid oldest ancester time";
}
break;
case kFileCreationTime:
if (!GetVarint64(&field, &f.file_creation_time)) {
return "invalid file creation time";
}
break;
case kFileChecksum:
f.file_checksum = field.ToString();
break;
case kFileChecksumFuncName:
f.file_checksum_func_name = field.ToString();
break;
case kNeedCompaction:
if (field.size() != 1) {
return "need_compaction field wrong size";
}
f.marked_for_compaction = (field[0] == 1);
break;
case kMinLogNumberToKeepHack:
// This is a hack to encode kMinLogNumberToKeep in a
// forward-compatible fashion.
if (!GetFixed64(&field, &min_log_number_to_keep_)) {
return "deleted log number malformatted";
}
has_min_log_number_to_keep_ = true;
break;
case kOldestBlobFileNumber:
if (!GetVarint64(&field, &f.oldest_blob_file_number)) {
return "invalid oldest blob file number";
}
break;
default:
if ((custom_tag & kCustomTagNonSafeIgnoreMask) != 0) {
// Should not proceed if cannot understand it
return "new-file4 custom field not supported";
}
break;
}
}
} else {
return "new-file4 entry";
}
f.fd =
FileDescriptor(number, path_id, file_size, smallest_seqno, largest_seqno);
new_files_.push_back(std::make_pair(level, f));
return nullptr;
}
Status VersionEdit::DecodeFrom(const Slice& src) {
Clear();
#ifndef NDEBUG
bool ignore_ignorable_tags = false;
TEST_SYNC_POINT_CALLBACK("VersionEdit::EncodeTo:IgnoreIgnorableTags",
&ignore_ignorable_tags);
#endif
Slice input = src;
const char* msg = nullptr;
uint32_t tag = 0;
// Temporary storage for parsing
int level = 0;
FileMetaData f;
Slice str;
InternalKey key;
while (msg == nullptr && GetVarint32(&input, &tag)) {
#ifndef NDEBUG
if (ignore_ignorable_tags && tag > kTagSafeIgnoreMask) {
tag = kTagSafeIgnoreMask;
}
#endif
switch (tag) {
case kDbId:
if (GetLengthPrefixedSlice(&input, &str)) {
db_id_ = str.ToString();
has_db_id_ = true;
} else {
msg = "db id";
}
break;
case kComparator:
if (GetLengthPrefixedSlice(&input, &str)) {
comparator_ = str.ToString();
has_comparator_ = true;
} else {
msg = "comparator name";
}
break;
case kLogNumber:
if (GetVarint64(&input, &log_number_)) {
has_log_number_ = true;
} else {
msg = "log number";
}
break;
case kPrevLogNumber:
if (GetVarint64(&input, &prev_log_number_)) {
has_prev_log_number_ = true;
} else {
msg = "previous log number";
}
break;
case kNextFileNumber:
if (GetVarint64(&input, &next_file_number_)) {
has_next_file_number_ = true;
} else {
msg = "next file number";
}
break;
case kMaxColumnFamily:
if (GetVarint32(&input, &max_column_family_)) {
has_max_column_family_ = true;
} else {
msg = "max column family";
}
break;
case kMinLogNumberToKeep:
if (GetVarint64(&input, &min_log_number_to_keep_)) {
has_min_log_number_to_keep_ = true;
} else {
msg = "min log number to kee";
}
break;
case kLastSequence:
if (GetVarint64(&input, &last_sequence_)) {
has_last_sequence_ = true;
} else {
msg = "last sequence number";
}
break;
case kCompactPointer:
if (GetLevel(&input, &level, &msg) &&
GetInternalKey(&input, &key)) {
// we don't use compact pointers anymore,
// but we should not fail if they are still
// in manifest
} else {
if (!msg) {
msg = "compaction pointer";
}
}
break;
case kDeletedFile: {
uint64_t number = 0;
if (GetLevel(&input, &level, &msg) && GetVarint64(&input, &number)) {
deleted_files_.insert(std::make_pair(level, number));
} else {
if (!msg) {
msg = "deleted file";
}
}
break;
}
case kNewFile: {
uint64_t number = 0;
uint64_t file_size = 0;
if (GetLevel(&input, &level, &msg) && GetVarint64(&input, &number) &&
GetVarint64(&input, &file_size) &&
GetInternalKey(&input, &f.smallest) &&
GetInternalKey(&input, &f.largest)) {
f.fd = FileDescriptor(number, 0, file_size);
new_files_.push_back(std::make_pair(level, f));
} else {
if (!msg) {
msg = "new-file entry";
}
}
break;
}
case kNewFile2: {
uint64_t number = 0;
uint64_t file_size = 0;
SequenceNumber smallest_seqno = 0;
SequenceNumber largest_seqno = kMaxSequenceNumber;
if (GetLevel(&input, &level, &msg) && GetVarint64(&input, &number) &&
GetVarint64(&input, &file_size) &&
GetInternalKey(&input, &f.smallest) &&
GetInternalKey(&input, &f.largest) &&
GetVarint64(&input, &smallest_seqno) &&
GetVarint64(&input, &largest_seqno)) {
f.fd = FileDescriptor(number, 0, file_size, smallest_seqno,
largest_seqno);
new_files_.push_back(std::make_pair(level, f));
} else {
if (!msg) {
msg = "new-file2 entry";
}
}
break;
}
case kNewFile3: {
uint64_t number = 0;
uint32_t path_id = 0;
uint64_t file_size = 0;
SequenceNumber smallest_seqno = 0;
SequenceNumber largest_seqno = kMaxSequenceNumber;
if (GetLevel(&input, &level, &msg) && GetVarint64(&input, &number) &&
GetVarint32(&input, &path_id) && GetVarint64(&input, &file_size) &&
GetInternalKey(&input, &f.smallest) &&
GetInternalKey(&input, &f.largest) &&
GetVarint64(&input, &smallest_seqno) &&
GetVarint64(&input, &largest_seqno)) {
f.fd = FileDescriptor(number, path_id, file_size, smallest_seqno,
largest_seqno);
new_files_.push_back(std::make_pair(level, f));
} else {
if (!msg) {
msg = "new-file3 entry";
}
}
break;
}
case kNewFile4: {
msg = DecodeNewFile4From(&input);
break;
}
case kBlobFileAddition: {
BlobFileAddition blob_file_addition;
const Status s = blob_file_addition.DecodeFrom(&input);
if (!s.ok()) {
return s;
}
AddBlobFile(std::move(blob_file_addition));
break;
}
case kBlobFileGarbage: {
BlobFileGarbage blob_file_garbage;
const Status s = blob_file_garbage.DecodeFrom(&input);
if (!s.ok()) {
return s;
}
AddBlobFileGarbage(std::move(blob_file_garbage));
break;
}
case kWalAddition: {
WalAddition wal_addition;
const Status s = wal_addition.DecodeFrom(&input);
if (!s.ok()) {
return s;
}
wal_additions_.emplace_back(std::move(wal_addition));
break;
}
case kWalAddition2: {
Slice encoded;
if (!GetLengthPrefixedSlice(&input, &encoded)) {
msg = "WalAddition not prefixed by length";
break;
}
WalAddition wal_addition;
const Status s = wal_addition.DecodeFrom(&encoded);
if (!s.ok()) {
return s;
}
wal_additions_.emplace_back(std::move(wal_addition));
break;
}
case kWalDeletion: {
WalDeletion wal_deletion;
const Status s = wal_deletion.DecodeFrom(&input);
if (!s.ok()) {
return s;
}
wal_deletion_ = std::move(wal_deletion);
break;
}
case kWalDeletion2: {
Slice encoded;
if (!GetLengthPrefixedSlice(&input, &encoded)) {
msg = "WalDeletion not prefixed by length";
break;
}
WalDeletion wal_deletion;
const Status s = wal_deletion.DecodeFrom(&encoded);
if (!s.ok()) {
return s;
}
wal_deletion_ = std::move(wal_deletion);
break;
}
case kColumnFamily:
if (!GetVarint32(&input, &column_family_)) {
if (!msg) {
msg = "set column family id";
}
}
break;
case kColumnFamilyAdd:
if (GetLengthPrefixedSlice(&input, &str)) {
is_column_family_add_ = true;
column_family_name_ = str.ToString();
} else {
if (!msg) {
msg = "column family add";
}
}
break;
case kColumnFamilyDrop:
is_column_family_drop_ = true;
break;
case kInAtomicGroup:
is_in_atomic_group_ = true;
if (!GetVarint32(&input, &remaining_entries_)) {
if (!msg) {
msg = "remaining entries";
}
}
break;
case kFullHistoryTsLow:
if (!GetLengthPrefixedSlice(&input, &str)) {
msg = "full_history_ts_low";
} else if (str.empty()) {
msg = "full_history_ts_low: empty";
} else {
full_history_ts_low_.assign(str.data(), str.size());
}
break;
default:
if (tag & kTagSafeIgnoreMask) {
// Tag from future which can be safely ignored.
// The next field must be the length of the entry.
uint32_t field_len;
if (!GetVarint32(&input, &field_len) ||
static_cast<size_t>(field_len) > input.size()) {
if (!msg) {
msg = "safely ignoreable tag length error";
}
} else {
input.remove_prefix(static_cast<size_t>(field_len));
}
} else {
msg = "unknown tag";
}
break;
}
}
if (msg == nullptr && !input.empty()) {
msg = "invalid tag";
}
Status result;
if (msg != nullptr) {
result = Status::Corruption("VersionEdit", msg);
}
return result;
}
std::string VersionEdit::DebugString(bool hex_key) const {
std::string r;
r.append("VersionEdit {");
if (has_db_id_) {
r.append("\n DB ID: ");
r.append(db_id_);
}
if (has_comparator_) {
r.append("\n Comparator: ");
r.append(comparator_);
}
if (has_log_number_) {
r.append("\n LogNumber: ");
AppendNumberTo(&r, log_number_);
}
if (has_prev_log_number_) {
r.append("\n PrevLogNumber: ");
AppendNumberTo(&r, prev_log_number_);
}
if (has_next_file_number_) {
r.append("\n NextFileNumber: ");
AppendNumberTo(&r, next_file_number_);
}
if (has_max_column_family_) {
r.append("\n MaxColumnFamily: ");
AppendNumberTo(&r, max_column_family_);
}
if (has_min_log_number_to_keep_) {
r.append("\n MinLogNumberToKeep: ");
AppendNumberTo(&r, min_log_number_to_keep_);
}
if (has_last_sequence_) {
r.append("\n LastSeq: ");
AppendNumberTo(&r, last_sequence_);
}
for (const auto& deleted_file : deleted_files_) {
r.append("\n DeleteFile: ");
AppendNumberTo(&r, deleted_file.first);
r.append(" ");
AppendNumberTo(&r, deleted_file.second);
}
for (size_t i = 0; i < new_files_.size(); i++) {
const FileMetaData& f = new_files_[i].second;
r.append("\n AddFile: ");
AppendNumberTo(&r, new_files_[i].first);
r.append(" ");
AppendNumberTo(&r, f.fd.GetNumber());
r.append(" ");
AppendNumberTo(&r, f.fd.GetFileSize());
r.append(" ");
r.append(f.smallest.DebugString(hex_key));
r.append(" .. ");
r.append(f.largest.DebugString(hex_key));
if (f.oldest_blob_file_number != kInvalidBlobFileNumber) {
r.append(" blob_file:");
AppendNumberTo(&r, f.oldest_blob_file_number);
}
r.append(" oldest_ancester_time:");
AppendNumberTo(&r, f.oldest_ancester_time);
r.append(" file_creation_time:");
AppendNumberTo(&r, f.file_creation_time);
r.append(" file_checksum:");
r.append(f.file_checksum);
r.append(" file_checksum_func_name: ");
r.append(f.file_checksum_func_name);
}
for (const auto& blob_file_addition : blob_file_additions_) {
r.append("\n BlobFileAddition: ");
r.append(blob_file_addition.DebugString());
}
for (const auto& blob_file_garbage : blob_file_garbages_) {
r.append("\n BlobFileGarbage: ");
r.append(blob_file_garbage.DebugString());
}
for (const auto& wal_addition : wal_additions_) {
r.append("\n WalAddition: ");
r.append(wal_addition.DebugString());
}
if (!wal_deletion_.IsEmpty()) {
r.append("\n WalDeletion: ");
r.append(wal_deletion_.DebugString());
}
r.append("\n ColumnFamily: ");
AppendNumberTo(&r, column_family_);
if (is_column_family_add_) {
r.append("\n ColumnFamilyAdd: ");
r.append(column_family_name_);
}
if (is_column_family_drop_) {
r.append("\n ColumnFamilyDrop");
}
if (is_in_atomic_group_) {
r.append("\n AtomicGroup: ");
AppendNumberTo(&r, remaining_entries_);
r.append(" entries remains");
}
if (HasFullHistoryTsLow()) {
r.append("\n FullHistoryTsLow: ");
r.append(Slice(full_history_ts_low_).ToString(hex_key));
}
r.append("\n}\n");
return r;
}
std::string VersionEdit::DebugJSON(int edit_num, bool hex_key) const {
JSONWriter jw;
jw << "EditNumber" << edit_num;
if (has_db_id_) {
jw << "DB ID" << db_id_;
}
if (has_comparator_) {
jw << "Comparator" << comparator_;
}
if (has_log_number_) {
jw << "LogNumber" << log_number_;
}
if (has_prev_log_number_) {
jw << "PrevLogNumber" << prev_log_number_;
}
if (has_next_file_number_) {
jw << "NextFileNumber" << next_file_number_;
}
if (has_max_column_family_) {
jw << "MaxColumnFamily" << max_column_family_;
}
if (has_min_log_number_to_keep_) {
jw << "MinLogNumberToKeep" << min_log_number_to_keep_;
}
if (has_last_sequence_) {
jw << "LastSeq" << last_sequence_;
}
if (!deleted_files_.empty()) {
jw << "DeletedFiles";
jw.StartArray();
for (const auto& deleted_file : deleted_files_) {
jw.StartArrayedObject();
jw << "Level" << deleted_file.first;
jw << "FileNumber" << deleted_file.second;
jw.EndArrayedObject();
}
jw.EndArray();
}
if (!new_files_.empty()) {
jw << "AddedFiles";
jw.StartArray();
for (size_t i = 0; i < new_files_.size(); i++) {
jw.StartArrayedObject();
jw << "Level" << new_files_[i].first;
const FileMetaData& f = new_files_[i].second;
jw << "FileNumber" << f.fd.GetNumber();
jw << "FileSize" << f.fd.GetFileSize();
jw << "SmallestIKey" << f.smallest.DebugString(hex_key);
jw << "LargestIKey" << f.largest.DebugString(hex_key);
if (f.oldest_blob_file_number != kInvalidBlobFileNumber) {
jw << "OldestBlobFile" << f.oldest_blob_file_number;
}
jw.EndArrayedObject();
}
jw.EndArray();
}
if (!blob_file_additions_.empty()) {
jw << "BlobFileAdditions";
jw.StartArray();
for (const auto& blob_file_addition : blob_file_additions_) {
jw.StartArrayedObject();
jw << blob_file_addition;
jw.EndArrayedObject();
}
jw.EndArray();
}
if (!blob_file_garbages_.empty()) {
jw << "BlobFileGarbages";
jw.StartArray();
for (const auto& blob_file_garbage : blob_file_garbages_) {
jw.StartArrayedObject();
jw << blob_file_garbage;
jw.EndArrayedObject();
}
jw.EndArray();
}
if (!wal_additions_.empty()) {
jw << "WalAdditions";
jw.StartArray();
for (const auto& wal_addition : wal_additions_) {
jw.StartArrayedObject();
jw << wal_addition;
jw.EndArrayedObject();
}
jw.EndArray();
}
if (!wal_deletion_.IsEmpty()) {
jw << "WalDeletion";
jw.StartObject();
jw << wal_deletion_;
jw.EndObject();
}
jw << "ColumnFamily" << column_family_;
if (is_column_family_add_) {
jw << "ColumnFamilyAdd" << column_family_name_;
}
if (is_column_family_drop_) {
jw << "ColumnFamilyDrop" << column_family_name_;
}
if (is_in_atomic_group_) {
jw << "AtomicGroup" << remaining_entries_;
}
if (HasFullHistoryTsLow()) {
jw << "FullHistoryTsLow" << Slice(full_history_ts_low_).ToString(hex_key);
}
jw.EndObject();
return jw.Get();
}
} // namespace ROCKSDB_NAMESPACE
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