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6b7fcc0d5f
rocksdb/tools/sst_dump_tool.cc
Levi Tamasi 3bde41b5a3 Move the filter readers out of the block cache (#5504) 
Summary:
Currently, when the block cache is used for the filter block, it is not
really the block itself that is stored in the cache but a FilterBlockReader
object. Since this object is not pure data (it has, for instance, pointers that
might dangle, including in one case a back pointer to the TableReader), it's not
really sharable. To avoid the issues around this, the current code erases the
cache entries when the TableReader is closed (which, BTW, is not sufficient
since a concurrent TableReader might have picked up the object in the meantime).
Instead of doing this, the patch moves the FilterBlockReader out of the cache
altogether, and decouples the filter reader object from the filter block.
In particular, instead of the TableReader owning, or caching/pinning the
FilterBlockReader (based on the customer's settings), with the change the
TableReader unconditionally owns the FilterBlockReader, which in turn
owns/caches/pins the filter block. This change also enables us to reuse the code
paths historically used for data blocks for filters as well.

Note:
Eviction statistics for filter blocks are temporarily broken. We plan to fix this in a
separate phase.
Pull Request resolved: https://github.com/facebook/rocksdb/pull/5504

Test Plan: make asan_check

Differential Revision: D16036974

Pulled By: ltamasi

fbshipit-source-id: 770f543c5fb4ed126fd1e04bfd3809cf4ff9c091
2019-07-16 13:14:58 -07:00

686 lines
23 KiB
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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).
//
#ifndef ROCKSDB_LITE
#include "tools/sst_dump_tool_imp.h"
#include <cinttypes>
#include <iostream>
#include <map>
#include <memory>
#include <sstream>
#include <vector>
#include "db/memtable.h"
#include "db/write_batch_internal.h"
#include "options/cf_options.h"
#include "rocksdb/db.h"
#include "rocksdb/env.h"
#include "rocksdb/iterator.h"
#include "rocksdb/slice_transform.h"
#include "rocksdb/status.h"
#include "rocksdb/table_properties.h"
#include "rocksdb/utilities/ldb_cmd.h"
#include "table/block_based/block.h"
#include "table/block_based/block_based_table_builder.h"
#include "table/block_based/block_based_table_factory.h"
#include "table/block_based/block_builder.h"
#include "table/format.h"
#include "table/meta_blocks.h"
#include "table/plain/plain_table_factory.h"
#include "table/table_reader.h"
#include "util/compression.h"
#include "util/random.h"
#include "port/port.h"
namespace rocksdb {
SstFileDumper::SstFileDumper(const Options& options,
const std::string& file_path, bool verify_checksum,
bool output_hex)
: file_name_(file_path),
read_num_(0),
verify_checksum_(verify_checksum),
output_hex_(output_hex),
options_(options),
ioptions_(options_),
moptions_(ColumnFamilyOptions(options_)),
internal_comparator_(BytewiseComparator()) {
fprintf(stdout, "Process %s\n", file_path.c_str());
init_result_ = GetTableReader(file_name_);
}
extern const uint64_t kBlockBasedTableMagicNumber;
extern const uint64_t kLegacyBlockBasedTableMagicNumber;
extern const uint64_t kPlainTableMagicNumber;
extern const uint64_t kLegacyPlainTableMagicNumber;
const char* testFileName = "test_file_name";
static const std::vector<std::pair<CompressionType, const char*>>
kCompressions = {
{CompressionType::kNoCompression, "kNoCompression"},
{CompressionType::kSnappyCompression, "kSnappyCompression"},
{CompressionType::kZlibCompression, "kZlibCompression"},
{CompressionType::kBZip2Compression, "kBZip2Compression"},
{CompressionType::kLZ4Compression, "kLZ4Compression"},
{CompressionType::kLZ4HCCompression, "kLZ4HCCompression"},
{CompressionType::kXpressCompression, "kXpressCompression"},
{CompressionType::kZSTD, "kZSTD"}};
Status SstFileDumper::GetTableReader(const std::string& file_path) {
// Warning about 'magic_number' being uninitialized shows up only in UBsan
// builds. Though access is guarded by 's.ok()' checks, fix the issue to
// avoid any warnings.
uint64_t magic_number = Footer::kInvalidTableMagicNumber;
// read table magic number
Footer footer;
std::unique_ptr<RandomAccessFile> file;
uint64_t file_size = 0;
Status s = options_.env->NewRandomAccessFile(file_path, &file, soptions_);
if (s.ok()) {
s = options_.env->GetFileSize(file_path, &file_size);
}
file_.reset(new RandomAccessFileReader(std::move(file), file_path));
if (s.ok()) {
s = ReadFooterFromFile(file_.get(), nullptr /* prefetch_buffer */,
file_size, &footer);
}
if (s.ok()) {
magic_number = footer.table_magic_number();
}
if (s.ok()) {
if (magic_number == kPlainTableMagicNumber ||
magic_number == kLegacyPlainTableMagicNumber) {
soptions_.use_mmap_reads = true;
options_.env->NewRandomAccessFile(file_path, &file, soptions_);
file_.reset(new RandomAccessFileReader(std::move(file), file_path));
}
options_.comparator = &internal_comparator_;
// For old sst format, ReadTableProperties might fail but file can be read
if (ReadTableProperties(magic_number, file_.get(), file_size).ok()) {
SetTableOptionsByMagicNumber(magic_number);
} else {
SetOldTableOptions();
}
}
if (s.ok()) {
s = NewTableReader(ioptions_, soptions_, internal_comparator_, file_size,
&table_reader_);
}
return s;
}
Status SstFileDumper::NewTableReader(
const ImmutableCFOptions& /*ioptions*/, const EnvOptions& /*soptions*/,
const InternalKeyComparator& /*internal_comparator*/, uint64_t file_size,
std::unique_ptr<TableReader>* /*table_reader*/) {
// We need to turn off pre-fetching of index and filter nodes for
// BlockBasedTable
if (BlockBasedTableFactory::kName == options_.table_factory->Name()) {
return options_.table_factory->NewTableReader(
TableReaderOptions(ioptions_, moptions_.prefix_extractor.get(),
soptions_, internal_comparator_),
std::move(file_), file_size, &table_reader_, /*enable_prefetch=*/false);
}
// For all other factory implementation
return options_.table_factory->NewTableReader(
TableReaderOptions(ioptions_, moptions_.prefix_extractor.get(), soptions_,
internal_comparator_),
std::move(file_), file_size, &table_reader_);
}
Status SstFileDumper::VerifyChecksum() {
return table_reader_->VerifyChecksum(TableReaderCaller::kSSTDumpTool);
}
Status SstFileDumper::DumpTable(const std::string& out_filename) {
std::unique_ptr<WritableFile> out_file;
Env* env = Env::Default();
env->NewWritableFile(out_filename, &out_file, soptions_);
Status s = table_reader_->DumpTable(out_file.get());
out_file->Close();
return s;
}
uint64_t SstFileDumper::CalculateCompressedTableSize(
const TableBuilderOptions& tb_options, size_t block_size) {
std::unique_ptr<WritableFile> out_file;
std::unique_ptr<Env> env(NewMemEnv(Env::Default()));
env->NewWritableFile(testFileName, &out_file, soptions_);
std::unique_ptr<WritableFileWriter> dest_writer;
dest_writer.reset(
new WritableFileWriter(std::move(out_file), testFileName, soptions_));
BlockBasedTableOptions table_options;
table_options.block_size = block_size;
BlockBasedTableFactory block_based_tf(table_options);
std::unique_ptr<TableBuilder> table_builder;
table_builder.reset(block_based_tf.NewTableBuilder(
tb_options,
TablePropertiesCollectorFactory::Context::kUnknownColumnFamily,
dest_writer.get()));
std::unique_ptr<InternalIterator> iter(table_reader_->NewIterator(
ReadOptions(), moptions_.prefix_extractor.get(), /*arena=*/nullptr,
/*skip_filters=*/false, TableReaderCaller::kSSTDumpTool));
for (iter->SeekToFirst(); iter->Valid(); iter->Next()) {
if (!iter->status().ok()) {
fputs(iter->status().ToString().c_str(), stderr);
exit(1);
}
table_builder->Add(iter->key(), iter->value());
}
Status s = table_builder->Finish();
if (!s.ok()) {
fputs(s.ToString().c_str(), stderr);
exit(1);
}
uint64_t size = table_builder->FileSize();
env->DeleteFile(testFileName);
return size;
}
int SstFileDumper::ShowAllCompressionSizes(
size_t block_size,
const std::vector<std::pair<CompressionType, const char*>>&
compression_types) {
ReadOptions read_options;
Options opts;
const ImmutableCFOptions imoptions(opts);
const ColumnFamilyOptions cfo(opts);
const MutableCFOptions moptions(cfo);
rocksdb::InternalKeyComparator ikc(opts.comparator);
std::vector<std::unique_ptr<IntTblPropCollectorFactory> >
block_based_table_factories;
fprintf(stdout, "Block Size: %" ROCKSDB_PRIszt "\n", block_size);
for (auto& i : compression_types) {
if (CompressionTypeSupported(i.first)) {
CompressionOptions compress_opt;
std::string column_family_name;
int unknown_level = -1;
TableBuilderOptions tb_opts(
imoptions, moptions, ikc, &block_based_table_factories, i.first,
0 /* sample_for_compression */, compress_opt,
false /* skip_filters */, column_family_name, unknown_level);
uint64_t file_size = CalculateCompressedTableSize(tb_opts, block_size);
fprintf(stdout, "Compression: %s", i.second);
fprintf(stdout, " Size: %" PRIu64 "\n", file_size);
} else {
fprintf(stdout, "Unsupported compression type: %s.\n", i.second);
}
}
return 0;
}
Status SstFileDumper::ReadTableProperties(uint64_t table_magic_number,
RandomAccessFileReader* file,
uint64_t file_size) {
TableProperties* table_properties = nullptr;
Status s = rocksdb::ReadTableProperties(file, file_size, table_magic_number,
ioptions_, &table_properties);
if (s.ok()) {
table_properties_.reset(table_properties);
} else {
fprintf(stdout, "Not able to read table properties\n");
}
return s;
}
Status SstFileDumper::SetTableOptionsByMagicNumber(
uint64_t table_magic_number) {
assert(table_properties_);
if (table_magic_number == kBlockBasedTableMagicNumber ||
table_magic_number == kLegacyBlockBasedTableMagicNumber) {
options_.table_factory = std::make_shared<BlockBasedTableFactory>();
fprintf(stdout, "Sst file format: block-based\n");
auto& props = table_properties_->user_collected_properties;
auto pos = props.find(BlockBasedTablePropertyNames::kIndexType);
if (pos != props.end()) {
auto index_type_on_file = static_cast<BlockBasedTableOptions::IndexType>(
DecodeFixed32(pos->second.c_str()));
if (index_type_on_file ==
BlockBasedTableOptions::IndexType::kHashSearch) {
options_.prefix_extractor.reset(NewNoopTransform());
}
}
} else if (table_magic_number == kPlainTableMagicNumber ||
table_magic_number == kLegacyPlainTableMagicNumber) {
options_.allow_mmap_reads = true;
PlainTableOptions plain_table_options;
plain_table_options.user_key_len = kPlainTableVariableLength;
plain_table_options.bloom_bits_per_key = 0;
plain_table_options.hash_table_ratio = 0;
plain_table_options.index_sparseness = 1;
plain_table_options.huge_page_tlb_size = 0;
plain_table_options.encoding_type = kPlain;
plain_table_options.full_scan_mode = true;
options_.table_factory.reset(NewPlainTableFactory(plain_table_options));
fprintf(stdout, "Sst file format: plain table\n");
} else {
char error_msg_buffer[80];
snprintf(error_msg_buffer, sizeof(error_msg_buffer) - 1,
"Unsupported table magic number --- %lx",
(long)table_magic_number);
return Status::InvalidArgument(error_msg_buffer);
}
return Status::OK();
}
Status SstFileDumper::SetOldTableOptions() {
assert(table_properties_ == nullptr);
options_.table_factory = std::make_shared<BlockBasedTableFactory>();
fprintf(stdout, "Sst file format: block-based(old version)\n");
return Status::OK();
}
Status SstFileDumper::ReadSequential(bool print_kv, uint64_t read_num,
bool has_from, const std::string& from_key,
bool has_to, const std::string& to_key,
bool use_from_as_prefix) {
if (!table_reader_) {
return init_result_;
}
InternalIterator* iter = table_reader_->NewIterator(
ReadOptions(verify_checksum_, false), moptions_.prefix_extractor.get(),
/*arena=*/nullptr, /*skip_filters=*/false,
TableReaderCaller::kSSTDumpTool);
uint64_t i = 0;
if (has_from) {
InternalKey ikey;
ikey.SetMinPossibleForUserKey(from_key);
iter->Seek(ikey.Encode());
} else {
iter->SeekToFirst();
}
for (; iter->Valid(); iter->Next()) {
Slice key = iter->key();
Slice value = iter->value();
++i;
if (read_num > 0 && i > read_num)
break;
ParsedInternalKey ikey;
if (!ParseInternalKey(key, &ikey)) {
std::cerr << "Internal Key ["
<< key.ToString(true /* in hex*/)
<< "] parse error!\n";
continue;
}
// the key returned is not prefixed with out 'from' key
if (use_from_as_prefix && !ikey.user_key.starts_with(from_key)) {
break;
}
// If end marker was specified, we stop before it
if (has_to && BytewiseComparator()->Compare(ikey.user_key, to_key) >= 0) {
break;
}
if (print_kv) {
fprintf(stdout, "%s => %s\n",
ikey.DebugString(output_hex_).c_str(),
value.ToString(output_hex_).c_str());
}
}
read_num_ += i;
Status ret = iter->status();
delete iter;
return ret;
}
Status SstFileDumper::ReadTableProperties(
std::shared_ptr<const TableProperties>* table_properties) {
if (!table_reader_) {
return init_result_;
}
*table_properties = table_reader_->GetTableProperties();
return init_result_;
}
namespace {
void print_help() {
fprintf(stderr,
R"(sst_dump --file=<data_dir_OR_sst_file> [--command=check|scan|raw]
--file=<data_dir_OR_sst_file>
Path to SST file or directory containing SST files
--command=check|scan|raw|verify
check: Iterate over entries in files but dont print anything except if an error is encounterd (default command)
scan: Iterate over entries in files and print them to screen
raw: Dump all the table contents to <file_name>_dump.txt
verify: Iterate all the blocks in files verifying checksum to detect possible coruption but dont print anything except if a corruption is encountered
recompress: reports the SST file size if recompressed with different
compression types
--output_hex
Can be combined with scan command to print the keys and values in Hex
--from=<user_key>
Key to start reading from when executing check|scan
--to=<user_key>
Key to stop reading at when executing check|scan
--prefix=<user_key>
Returns all keys with this prefix when executing check|scan
Cannot be used in conjunction with --from
--read_num=<num>
Maximum number of entries to read when executing check|scan
--verify_checksum
Verify file checksum when executing check|scan
--input_key_hex
Can be combined with --from and --to to indicate that these values are encoded in Hex
--show_properties
Print table properties after iterating over the file when executing
check|scan|raw
--set_block_size=<block_size>
Can be combined with --command=recompress to set the block size that will
be used when trying different compression algorithms
--compression_types=<comma-separated list of CompressionType members, e.g.,
kSnappyCompression>
Can be combined with --command=recompress to run recompression for this
list of compression types
--parse_internal_key=<0xKEY>
Convenience option to parse an internal key on the command line. Dumps the
internal key in hex format {'key' @ SN: type}
)");
}
} // namespace
int SSTDumpTool::Run(int argc, char** argv, Options options) {
const char* dir_or_file = nullptr;
uint64_t read_num = std::numeric_limits<uint64_t>::max();
std::string command;
char junk;
uint64_t n;
bool verify_checksum = false;
bool output_hex = false;
bool input_key_hex = false;
bool has_from = false;
bool has_to = false;
bool use_from_as_prefix = false;
bool show_properties = false;
bool show_summary = false;
bool set_block_size = false;
std::string from_key;
std::string to_key;
std::string block_size_str;
size_t block_size = 0;
std::vector<std::pair<CompressionType, const char*>> compression_types;
uint64_t total_num_files = 0;
uint64_t total_num_data_blocks = 0;
uint64_t total_data_block_size = 0;
uint64_t total_index_block_size = 0;
uint64_t total_filter_block_size = 0;
for (int i = 1; i < argc; i++) {
if (strncmp(argv[i], "--file=", 7) == 0) {
dir_or_file = argv[i] + 7;
} else if (strcmp(argv[i], "--output_hex") == 0) {
output_hex = true;
} else if (strcmp(argv[i], "--input_key_hex") == 0) {
input_key_hex = true;
} else if (sscanf(argv[i],
"--read_num=%lu%c",
(unsigned long*)&n, &junk) == 1) {
read_num = n;
} else if (strcmp(argv[i], "--verify_checksum") == 0) {
verify_checksum = true;
} else if (strncmp(argv[i], "--command=", 10) == 0) {
command = argv[i] + 10;
} else if (strncmp(argv[i], "--from=", 7) == 0) {
from_key = argv[i] + 7;
has_from = true;
} else if (strncmp(argv[i], "--to=", 5) == 0) {
to_key = argv[i] + 5;
has_to = true;
} else if (strncmp(argv[i], "--prefix=", 9) == 0) {
from_key = argv[i] + 9;
use_from_as_prefix = true;
} else if (strcmp(argv[i], "--show_properties") == 0) {
show_properties = true;
} else if (strcmp(argv[i], "--show_summary") == 0) {
show_summary = true;
} else if (strncmp(argv[i], "--set_block_size=", 17) == 0) {
set_block_size = true;
block_size_str = argv[i] + 17;
std::istringstream iss(block_size_str);
iss >> block_size;
if (iss.fail()) {
fprintf(stderr, "block size must be numeric\n");
exit(1);
}
} else if (strncmp(argv[i], "--compression_types=", 20) == 0) {
std::string compression_types_csv = argv[i] + 20;
std::istringstream iss(compression_types_csv);
std::string compression_type;
while (std::getline(iss, compression_type, ',')) {
auto iter = std::find_if(
kCompressions.begin(), kCompressions.end(),
[&compression_type](std::pair<CompressionType, const char*> curr) {
return curr.second == compression_type;
});
if (iter == kCompressions.end()) {
fprintf(stderr, "%s is not a valid CompressionType\n",
compression_type.c_str());
exit(1);
}
compression_types.emplace_back(*iter);
}
} else if (strncmp(argv[i], "--parse_internal_key=", 21) == 0) {
std::string in_key(argv[i] + 21);
try {
in_key = rocksdb::LDBCommand::HexToString(in_key);
} catch (...) {
std::cerr << "ERROR: Invalid key input '"
<< in_key
<< "' Use 0x{hex representation of internal rocksdb key}" << std::endl;
return -1;
}
Slice sl_key = rocksdb::Slice(in_key);
ParsedInternalKey ikey;
int retc = 0;
if (!ParseInternalKey(sl_key, &ikey)) {
std::cerr << "Internal Key [" << sl_key.ToString(true /* in hex*/)
<< "] parse error!\n";
retc = -1;
}
fprintf(stdout, "key=%s\n", ikey.DebugString(true).c_str());
return retc;
} else {
fprintf(stderr, "Unrecognized argument '%s'\n\n", argv[i]);
print_help();
exit(1);
}
}
if (use_from_as_prefix && has_from) {
fprintf(stderr, "Cannot specify --prefix and --from\n\n");
exit(1);
}
if (input_key_hex) {
if (has_from || use_from_as_prefix) {
from_key = rocksdb::LDBCommand::HexToString(from_key);
}
if (has_to) {
to_key = rocksdb::LDBCommand::HexToString(to_key);
}
}
if (dir_or_file == nullptr) {
fprintf(stderr, "file or directory must be specified.\n\n");
print_help();
exit(1);
}
std::vector<std::string> filenames;
rocksdb::Env* env = options.env;
rocksdb::Status st = env->GetChildren(dir_or_file, &filenames);
bool dir = true;
if (!st.ok()) {
filenames.clear();
filenames.push_back(dir_or_file);
dir = false;
}
fprintf(stdout, "from [%s] to [%s]\n",
rocksdb::Slice(from_key).ToString(true).c_str(),
rocksdb::Slice(to_key).ToString(true).c_str());
uint64_t total_read = 0;
for (size_t i = 0; i < filenames.size(); i++) {
std::string filename = filenames.at(i);
if (filename.length() <= 4 ||
filename.rfind(".sst") != filename.length() - 4) {
// ignore
continue;
}
if (dir) {
filename = std::string(dir_or_file) + "/" + filename;
}
rocksdb::SstFileDumper dumper(options, filename, verify_checksum,
output_hex);
if (!dumper.getStatus().ok()) {
fprintf(stderr, "%s: %s\n", filename.c_str(),
dumper.getStatus().ToString().c_str());
continue;
}
if (command == "recompress") {
dumper.ShowAllCompressionSizes(
set_block_size ? block_size : 16384,
compression_types.empty() ? kCompressions : compression_types);
return 0;
}
if (command == "raw") {
std::string out_filename = filename.substr(0, filename.length() - 4);
out_filename.append("_dump.txt");
st = dumper.DumpTable(out_filename);
if (!st.ok()) {
fprintf(stderr, "%s: %s\n", filename.c_str(), st.ToString().c_str());
exit(1);
} else {
fprintf(stdout, "raw dump written to file %s\n", &out_filename[0]);
}
continue;
}
// scan all files in give file path.
if (command == "" || command == "scan" || command == "check") {
st = dumper.ReadSequential(
command == "scan", read_num > 0 ? (read_num - total_read) : read_num,
has_from || use_from_as_prefix, from_key, has_to, to_key,
use_from_as_prefix);
if (!st.ok()) {
fprintf(stderr, "%s: %s\n", filename.c_str(),
st.ToString().c_str());
}
total_read += dumper.GetReadNumber();
if (read_num > 0 && total_read > read_num) {
break;
}
}
if (command == "verify") {
st = dumper.VerifyChecksum();
if (!st.ok()) {
fprintf(stderr, "%s is corrupted: %s\n", filename.c_str(),
st.ToString().c_str());
} else {
fprintf(stdout, "The file is ok\n");
}
continue;
}
if (show_properties || show_summary) {
const rocksdb::TableProperties* table_properties;
std::shared_ptr<const rocksdb::TableProperties>
table_properties_from_reader;
st = dumper.ReadTableProperties(&table_properties_from_reader);
if (!st.ok()) {
fprintf(stderr, "%s: %s\n", filename.c_str(), st.ToString().c_str());
fprintf(stderr, "Try to use initial table properties\n");
table_properties = dumper.GetInitTableProperties();
} else {
table_properties = table_properties_from_reader.get();
}
if (table_properties != nullptr) {
if (show_properties) {
fprintf(stdout,
"Table Properties:\n"
"------------------------------\n"
" %s",
table_properties->ToString("\n ", ": ").c_str());
}
total_num_files += 1;
total_num_data_blocks += table_properties->num_data_blocks;
total_data_block_size += table_properties->data_size;
total_index_block_size += table_properties->index_size;
total_filter_block_size += table_properties->filter_size;
}
if (show_properties) {
fprintf(stdout,
"Raw user collected properties\n"
"------------------------------\n");
for (const auto& kv : table_properties->user_collected_properties) {
std::string prop_name = kv.first;
std::string prop_val = Slice(kv.second).ToString(true);
fprintf(stdout, " # %s: 0x%s\n", prop_name.c_str(),
prop_val.c_str());
}
}
}
}
if (show_summary) {
fprintf(stdout, "total number of files: %" PRIu64 "\n", total_num_files);
fprintf(stdout, "total number of data blocks: %" PRIu64 "\n",
total_num_data_blocks);
fprintf(stdout, "total data block size: %" PRIu64 "\n",
total_data_block_size);
fprintf(stdout, "total index block size: %" PRIu64 "\n",
total_index_block_size);
fprintf(stdout, "total filter block size: %" PRIu64 "\n",
total_filter_block_size);
}
return 0;
}
} // namespace rocksdb
#endif // ROCKSDB_LITE
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