Revision f0e8731b72c254da2843d64d27dc7c419bef4bd0 authored by Tongliang Liao on 11 May 2020, 17:26:18 UTC, committed by Facebook GitHub Bot on 11 May 2020, 17:28:49 UTC
Summary: Related to some discussion in https://github.com/facebook/rocksdb/issues/6179 Pull Request resolved: https://github.com/facebook/rocksdb/pull/6771 Reviewed By: zhichao-cao Differential Revision: D21340117 fbshipit-source-id: a1af0ba4865bb13c8c817851d6f6c4056191b3fe
1 parent 3a1c29d
import_column_family_job.cc
#ifndef ROCKSDB_LITE
#include "db/import_column_family_job.h"
#include <algorithm>
#include <cinttypes>
#include <string>
#include <vector>
#include "db/version_edit.h"
#include "file/file_util.h"
#include "file/random_access_file_reader.h"
#include "table/merging_iterator.h"
#include "table/scoped_arena_iterator.h"
#include "table/sst_file_writer_collectors.h"
#include "table/table_builder.h"
#include "util/stop_watch.h"
namespace ROCKSDB_NAMESPACE {
Status ImportColumnFamilyJob::Prepare(uint64_t next_file_number,
SuperVersion* sv) {
Status status;
// Read the information of files we are importing
for (const auto& file_metadata : metadata_) {
const auto file_path = file_metadata.db_path + "/" + file_metadata.name;
IngestedFileInfo file_to_import;
status = GetIngestedFileInfo(file_path, &file_to_import, sv);
if (!status.ok()) {
return status;
}
files_to_import_.push_back(file_to_import);
}
auto num_files = files_to_import_.size();
if (num_files == 0) {
return Status::InvalidArgument("The list of files is empty");
} else if (num_files > 1) {
// Verify that passed files don't have overlapping ranges in any particular
// level.
int min_level = 1; // Check for overlaps in Level 1 and above.
int max_level = -1;
for (const auto& file_metadata : metadata_) {
if (file_metadata.level > max_level) {
max_level = file_metadata.level;
}
}
for (int level = min_level; level <= max_level; ++level) {
autovector<const IngestedFileInfo*> sorted_files;
for (size_t i = 0; i < num_files; i++) {
if (metadata_[i].level == level) {
sorted_files.push_back(&files_to_import_[i]);
}
}
std::sort(
sorted_files.begin(), sorted_files.end(),
[this](const IngestedFileInfo* info1, const IngestedFileInfo* info2) {
return cfd_->internal_comparator().Compare(
info1->smallest_internal_key,
info2->smallest_internal_key) < 0;
});
for (size_t i = 0; i + 1 < sorted_files.size(); i++) {
if (cfd_->internal_comparator().Compare(
sorted_files[i]->largest_internal_key,
sorted_files[i + 1]->smallest_internal_key) >= 0) {
return Status::InvalidArgument("Files have overlapping ranges");
}
}
}
}
for (const auto& f : files_to_import_) {
if (f.num_entries == 0) {
return Status::InvalidArgument("File contain no entries");
}
if (!f.smallest_internal_key.Valid() || !f.largest_internal_key.Valid()) {
return Status::Corruption("File has corrupted keys");
}
}
// Copy/Move external files into DB
auto hardlink_files = import_options_.move_files;
for (auto& f : files_to_import_) {
f.fd = FileDescriptor(next_file_number++, 0, f.file_size);
const auto path_outside_db = f.external_file_path;
const auto path_inside_db = TableFileName(
cfd_->ioptions()->cf_paths, f.fd.GetNumber(), f.fd.GetPathId());
if (hardlink_files) {
status =
fs_->LinkFile(path_outside_db, path_inside_db, IOOptions(), nullptr);
if (status.IsNotSupported()) {
// Original file is on a different FS, use copy instead of hard linking
hardlink_files = false;
}
}
if (!hardlink_files) {
status = CopyFile(fs_, path_outside_db, path_inside_db, 0,
db_options_.use_fsync);
}
if (!status.ok()) {
break;
}
f.copy_file = !hardlink_files;
f.internal_file_path = path_inside_db;
}
if (!status.ok()) {
// We failed, remove all files that we copied into the db
for (const auto& f : files_to_import_) {
if (f.internal_file_path.empty()) {
break;
}
const auto s =
fs_->DeleteFile(f.internal_file_path, IOOptions(), nullptr);
if (!s.ok()) {
ROCKS_LOG_WARN(db_options_.info_log,
"AddFile() clean up for file %s failed : %s",
f.internal_file_path.c_str(), s.ToString().c_str());
}
}
}
return status;
}
// REQUIRES: we have become the only writer by entering both write_thread_ and
// nonmem_write_thread_
Status ImportColumnFamilyJob::Run() {
Status status;
edit_.SetColumnFamily(cfd_->GetID());
// We use the import time as the ancester time. This is the time the data
// is written to the database.
int64_t temp_current_time = 0;
uint64_t oldest_ancester_time = kUnknownOldestAncesterTime;
uint64_t current_time = kUnknownOldestAncesterTime;
if (env_->GetCurrentTime(&temp_current_time).ok()) {
current_time = oldest_ancester_time =
static_cast<uint64_t>(temp_current_time);
}
for (size_t i = 0; i < files_to_import_.size(); ++i) {
const auto& f = files_to_import_[i];
const auto& file_metadata = metadata_[i];
edit_.AddFile(file_metadata.level, f.fd.GetNumber(), f.fd.GetPathId(),
f.fd.GetFileSize(), f.smallest_internal_key,
f.largest_internal_key, file_metadata.smallest_seqno,
file_metadata.largest_seqno, false, kInvalidBlobFileNumber,
oldest_ancester_time, current_time, kUnknownFileChecksum,
kUnknownFileChecksumFuncName);
// If incoming sequence number is higher, update local sequence number.
if (file_metadata.largest_seqno > versions_->LastSequence()) {
versions_->SetLastAllocatedSequence(file_metadata.largest_seqno);
versions_->SetLastPublishedSequence(file_metadata.largest_seqno);
versions_->SetLastSequence(file_metadata.largest_seqno);
}
}
return status;
}
void ImportColumnFamilyJob::Cleanup(const Status& status) {
if (!status.ok()) {
// We failed to add files to the database remove all the files we copied.
for (const auto& f : files_to_import_) {
const auto s =
fs_->DeleteFile(f.internal_file_path, IOOptions(), nullptr);
if (!s.ok()) {
ROCKS_LOG_WARN(db_options_.info_log,
"AddFile() clean up for file %s failed : %s",
f.internal_file_path.c_str(), s.ToString().c_str());
}
}
} else if (status.ok() && import_options_.move_files) {
// The files were moved and added successfully, remove original file links
for (IngestedFileInfo& f : files_to_import_) {
const auto s =
fs_->DeleteFile(f.external_file_path, IOOptions(), nullptr);
if (!s.ok()) {
ROCKS_LOG_WARN(
db_options_.info_log,
"%s was added to DB successfully but failed to remove original "
"file link : %s",
f.external_file_path.c_str(), s.ToString().c_str());
}
}
}
}
Status ImportColumnFamilyJob::GetIngestedFileInfo(
const std::string& external_file, IngestedFileInfo* file_to_import,
SuperVersion* sv) {
file_to_import->external_file_path = external_file;
// Get external file size
Status status = fs_->GetFileSize(external_file, IOOptions(),
&file_to_import->file_size, nullptr);
if (!status.ok()) {
return status;
}
// Create TableReader for external file
std::unique_ptr<TableReader> table_reader;
std::unique_ptr<FSRandomAccessFile> sst_file;
std::unique_ptr<RandomAccessFileReader> sst_file_reader;
status = fs_->NewRandomAccessFile(external_file, env_options_,
&sst_file, nullptr);
if (!status.ok()) {
return status;
}
sst_file_reader.reset(
new RandomAccessFileReader(std::move(sst_file), external_file));
status = cfd_->ioptions()->table_factory->NewTableReader(
TableReaderOptions(*cfd_->ioptions(),
sv->mutable_cf_options.prefix_extractor.get(),
env_options_, cfd_->internal_comparator()),
std::move(sst_file_reader), file_to_import->file_size, &table_reader);
if (!status.ok()) {
return status;
}
// Get the external file properties
auto props = table_reader->GetTableProperties();
// Set original_seqno to 0.
file_to_import->original_seqno = 0;
// Get number of entries in table
file_to_import->num_entries = props->num_entries;
ParsedInternalKey key;
ReadOptions ro;
// During reading the external file we can cache blocks that we read into
// the block cache, if we later change the global seqno of this file, we will
// have block in cache that will include keys with wrong seqno.
// We need to disable fill_cache so that we read from the file without
// updating the block cache.
ro.fill_cache = false;
std::unique_ptr<InternalIterator> iter(table_reader->NewIterator(
ro, sv->mutable_cf_options.prefix_extractor.get(), /*arena=*/nullptr,
/*skip_filters=*/false, TableReaderCaller::kExternalSSTIngestion));
// Get first (smallest) key from file
iter->SeekToFirst();
if (!ParseInternalKey(iter->key(), &key)) {
return Status::Corruption("external file have corrupted keys");
}
file_to_import->smallest_internal_key.SetFrom(key);
// Get last (largest) key from file
iter->SeekToLast();
if (!ParseInternalKey(iter->key(), &key)) {
return Status::Corruption("external file have corrupted keys");
}
file_to_import->largest_internal_key.SetFrom(key);
file_to_import->cf_id = static_cast<uint32_t>(props->column_family_id);
file_to_import->table_properties = *props;
return status;
}
} // namespace ROCKSDB_NAMESPACE
#endif // !ROCKSDB_LITE
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