sst_dump tool

Summary:
as subject

add a tool to read sst file

as subject.

./sst_reader --command=check --file=
./sst_reader --command=scan --file=

Test Plan:
db_test

run this command

Reviewers: dhruba

Differential Revision: https://reviews.facebook.net/D4881
main
heyongqiang 12 years ago
parent 1c99b0a6b3
commit 64219276f0
  1. 2
      db/version_set.cc
  2. 148
      tools/sst_dump.cc

@ -939,7 +939,7 @@ Status VersionSet::Recover() {
log_number_ = log_number; log_number_ = log_number;
prev_log_number_ = prev_log_number; prev_log_number_ = prev_log_number;
Log(options_->info_log, "Recovering from manifest file:%s succeeded," Log(options_->info_log, "Recovered from manifest file:%s succeeded,"
"manifest_file_number is %lld, next_file_number is %lld, " "manifest_file_number is %lld, next_file_number is %lld, "
"last_sequence is %lld, log_number is %lld," "last_sequence is %lld, log_number is %lld,"
"prev_log_number is %lld\n", "prev_log_number is %lld\n",

@ -0,0 +1,148 @@
#include "leveldb/table.h"
#include <map>
#include <string>
#include <vector>
#include "db/dbformat.h"
#include "db/memtable.h"
#include "db/write_batch_internal.h"
#include "leveldb/db.h"
#include "leveldb/env.h"
#include "leveldb/iterator.h"
#include "leveldb/table_builder.h"
#include "table/block.h"
#include "table/block_builder.h"
#include "table/format.h"
#include "util/random.h"
#include "util/testharness.h"
#include "util/testutil.h"
namespace leveldb {
class SstFileReader {
public:
SstFileReader(std::string file_name);
Status ReadSequential(bool print_kv, uint64_t read_num = -1);
uint64_t GetReadNumber() { return read_num_; }
private:
std::string file_name_;
uint64_t read_num_;
};
SstFileReader::SstFileReader(std::string file_path)
:file_name_(file_path), read_num_(0) {
}
Status SstFileReader::ReadSequential(bool print_kv, uint64_t read_num)
{
Table* table;
Options table_options;
RandomAccessFile* file = NULL;
Status s = table_options.env->NewRandomAccessFile(file_name_, &file);
if(!s.ok()) {
return s;
}
uint64_t file_size;
table_options.env->GetFileSize(file_name_, &file_size);
s = Table::Open(table_options, file, file_size, &table);
if(!s.ok()) {
return s;
}
Iterator* iter = table->NewIterator(ReadOptions());
long i = 0;
int64_t bytes = 0;
for (iter->SeekToFirst(); iter->Valid(); iter->Next()) {
Slice key = iter->key();
Slice value = iter->value();
++i;
if (i > read_num)
break;
if (print_kv) {
fprintf(stdout, "%s : %s\n",
key.ToString().c_str(), value.ToString().c_str());
}
}
read_num_ += i;
Status ret = iter->status();
delete iter;
return ret;
}
} // namespace leveldb
static void print_help() {
fprintf(stderr,
"sst_dump [--command=check|scan] --file=data_dir_OR_sst_file"
" [--read_num=NUM]\n");
}
int main(int argc, char** argv) {
const char* dir_or_file;
uint64_t read_num = -1;
std::string command;
char junk;
uint64_t n;
for (int i = 1; i < argc; i++)
{
if (strncmp(argv[i], "--file=", 7) == 0) {
dir_or_file = argv[i] + 7;
} else if (sscanf(argv[i], "--read_num=%ld%c", &n, &junk) == 1) {
read_num = n;
} else if (strncmp(argv[i], "--command=", 10) == 0) {
command = argv[i] + 10;
} else {
print_help();
exit(1);
}
}
if(dir_or_file == NULL) {
print_help();
exit(1);
}
std::vector<std::string> filenames;
leveldb::Env* env = leveldb::Env::Default();
leveldb::Status st = env->GetChildren(dir_or_file, &filenames);
bool dir = true;
if (!st.ok()) {
filenames.clear();
filenames.push_back(dir_or_file);
dir = false;
}
int total_read = 0;
for (int 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 = dir_or_file + filename;
}
leveldb::SstFileReader reader(filename);
leveldb::Status st;
// scan all files in give file path.
if (command == "" || command == "scan" || command == "check") {
st = reader.ReadSequential(command != "check");
if (!st.ok()) {
fprintf(stderr, "%s: %s\n", filename.c_str(),
st.ToString().c_str());
}
total_read += reader.GetReadNumber();
if (read_num >= 0 && total_read > read_num) {
break;
}
}
}
}
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