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[RocksDB] Improve sst_dump to take user key range

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Summary: The ability to dump internal keys associated with certain user keys, directly from sst files, is very useful for diagnosis. Will incorporate it directly into ldb later.

Test Plan: run it

Reviewers: dhruba

CC: leveldb

Differential Revision: https://reviews.facebook.net/D12075
This commit is contained in:
Haobo Xu 2013-08-07 13:36:26 -07:00
parent 678d3a1633
commit 58a0ae06dc
1 changed files with 99 additions and 15 deletions
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110
tools/sst_dump.cc
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@ -14,6 +14,7 @@
#include "table/block.h"
#include "table/block_builder.h"
#include "table/format.h"
#include "util/ldb_cmd.h"
#include "util/random.h"
#include "util/testharness.h"
#include "util/testutil.h"
@ -22,10 +23,16 @@ namespace leveldb {
class SstFileReader {
public:
explicit SstFileReader(std::string file_name,
bool verify_checksum = false,
bool output_hex = false);
Status ReadSequential(bool print_kv, uint64_t read_num = -1);
explicit SstFileReader(const std::string& file_name,
bool verify_checksum,
bool output_hex);
Status ReadSequential(bool print_kv,
uint64_t read_num,
bool has_from,
const std::string& from_key,
bool has_to,
const std::string& to_key);
uint64_t GetReadNumber() { return read_num_; }
@ -37,17 +44,25 @@ private:
EnvOptions soptions_;
};
SstFileReader::SstFileReader(std::string file_path,
SstFileReader::SstFileReader(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) {
std::cout << "Process " << file_path << "\n";
}
Status SstFileReader::ReadSequential(bool print_kv, uint64_t read_num)
Status SstFileReader::ReadSequential(bool print_kv,
uint64_t read_num,
bool has_from,
const std::string& from_key,
bool has_to,
const std::string& to_key)
{
unique_ptr<Table> table;
InternalKeyComparator internal_comparator_(BytewiseComparator());
Options table_options;
table_options.comparator = &internal_comparator_;
unique_ptr<RandomAccessFile> file;
Status s = table_options.env->NewRandomAccessFile(file_name_, &file,
soptions_);
@ -63,17 +78,38 @@ Status SstFileReader::ReadSequential(bool print_kv, uint64_t read_num)
Iterator* iter = table->NewIterator(ReadOptions(verify_checksum_, false));
uint64_t i = 0;
for (iter->SeekToFirst(); iter->Valid(); iter->Next()) {
if (has_from) {
InternalKey ikey(from_key, kMaxSequenceNumber, kValueTypeForSeek);
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;
if (print_kv) {
fprintf(stdout, "%s ==> %s\n",
key.ToString(output_hex_).c_str(),
value.ToString(output_hex_).c_str());
ParsedInternalKey ikey;
if (!ParseInternalKey(key, &ikey)) {
std::cerr << "Internal Key ["
<< key.ToString(true /* in hex*/)
<< "] parse error!\n";
continue;
}
// If end marker was specified, we stop before it
if (has_to && BytewiseComparator()->Compare(ikey.user_key, to_key) >= 0) {
break;
}
if (print_kv) {
std::cout << ikey.DebugString(output_hex_)
<< " => "
<< value.ToString(output_hex_) << "\n";
}
}
read_num_ += i;
@ -90,9 +126,29 @@ static void print_help() {
"sst_dump [--command=check|scan] [--verify_checksum] "
"--file=data_dir_OR_sst_file"
" [--output_hex]"
" [--input_key_hex]"
" [--from=<user_key>]"
" [--to=<user_key>]"
" [--read_num=NUM]\n");
}
string HexToString(const string& str) {
string parsed;
if (str[0] != '0' || str[1] != 'x') {
fprintf(stderr, "Invalid hex input %s. Must start with 0x\n",
str.c_str());
throw "Invalid hex input";
}
for (unsigned int i = 2; i < str.length();) {
int c;
sscanf(str.c_str() + i, "%2X", &c);
parsed.push_back(c);
i += 2;
}
return parsed;
}
int main(int argc, char** argv) {
const char* dir_or_file = nullptr;
@ -103,24 +159,47 @@ int main(int argc, char** argv) {
uint64_t n;
bool verify_checksum = false;
bool output_hex = false;
bool input_key_hex = false;
bool has_from = false;
bool has_to = false;
std::string from_key;
std::string to_key;
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=%ld%c", &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 {
print_help();
exit(1);
}
}
if (input_key_hex) {
if (has_from) {
from_key = HexToString(from_key);
}
if (has_to) {
to_key = HexToString(to_key);
}
}
if(dir_or_file == nullptr) {
print_help();
exit(1);
@ -136,6 +215,9 @@ int main(int argc, char** argv) {
dir = false;
}
std::cout << "from [" << leveldb::Slice(from_key).ToString(true)
<< "] to [" << leveldb::Slice(to_key).ToString(true) << "]\n";
uint64_t total_read = 0;
for (size_t i = 0; i < filenames.size(); i++) {
std::string filename = filenames.at(i);
@ -145,7 +227,7 @@ int main(int argc, char** argv) {
continue;
}
if(dir) {
filename = std::string(dir_or_file) + "//" + filename;
filename = std::string(dir_or_file) + "/" + filename;
}
leveldb::SstFileReader reader(filename, verify_checksum,
output_hex);
@ -153,7 +235,9 @@ int main(int argc, char** argv) {
// scan all files in give file path.
if (command == "" || command == "scan" || command == "check") {
st = reader.ReadSequential(command != "check",
read_num > 0 ? (read_num - total_read) : read_num);
read_num > 0 ? (read_num - total_read) :
read_num,
has_from, from_key, has_to, to_key);
if (!st.ok()) {
fprintf(stderr, "%s: %s\n", filename.c_str(),
st.ToString().c_str());