--- /dev/null
+// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
+// vim: ts=8 sw=2 smarttab
+#ifndef ROCKS_DB_STORE_H
+#define ROCKS_DB_STORE_H
+
+#include "include/types.h"
+#include "include/buffer_fwd.h"
+#include "KeyValueDB.h"
+#include <set>
+#include <map>
+#include <string>
+#include <memory>
+#include <boost/scoped_ptr.hpp>
+#include "rocksdb/write_batch.h"
+#include "rocksdb/perf_context.h"
+#include "rocksdb/iostats_context.h"
+#include "rocksdb/statistics.h"
+#include "rocksdb/table.h"
+#include <errno.h>
+#include "common/errno.h"
+#include "common/dout.h"
+#include "include/assert.h"
+#include "common/Formatter.h"
+#include "common/Cond.h"
+
+#include "common/ceph_context.h"
+class PerfCounters;
+
+enum {
+ l_rocksdb_first = 34300,
+ l_rocksdb_gets,
+ l_rocksdb_txns,
+ l_rocksdb_txns_sync,
+ l_rocksdb_get_latency,
+ l_rocksdb_submit_latency,
+ l_rocksdb_submit_sync_latency,
+ l_rocksdb_compact,
+ l_rocksdb_compact_range,
+ l_rocksdb_compact_queue_merge,
+ l_rocksdb_compact_queue_len,
+ l_rocksdb_write_wal_time,
+ l_rocksdb_write_memtable_time,
+ l_rocksdb_write_delay_time,
+ l_rocksdb_write_pre_and_post_process_time,
+ l_rocksdb_last,
+};
+
+namespace rocksdb{
+ class DB;
+ class Env;
+ class Cache;
+ class FilterPolicy;
+ class Snapshot;
+ class Slice;
+ class WriteBatch;
+ class Iterator;
+ class Logger;
+ struct Options;
+ struct BlockBasedTableOptions;
+}
+
+extern rocksdb::Logger *create_rocksdb_ceph_logger();
+
+/**
+ * Uses RocksDB to implement the KeyValueDB interface
+ */
+class RocksDBStore : public KeyValueDB {
+ CephContext *cct;
+ PerfCounters *logger;
+ string path;
+ void *priv;
+ rocksdb::DB *db;
+ rocksdb::Env *env;
+ std::shared_ptr<rocksdb::Statistics> dbstats;
+ rocksdb::BlockBasedTableOptions bbt_opts;
+ string options_str;
+
+ uint64_t cache_size = 0;
+ bool set_cache_flag = false;
+
+ int do_open(ostream &out, bool create_if_missing);
+
+ // manage async compactions
+ Mutex compact_queue_lock;
+ Cond compact_queue_cond;
+ list< pair<string,string> > compact_queue;
+ bool compact_queue_stop;
+ class CompactThread : public Thread {
+ RocksDBStore *db;
+ public:
+ explicit CompactThread(RocksDBStore *d) : db(d) {}
+ void *entry() override {
+ db->compact_thread_entry();
+ return NULL;
+ }
+ friend class RocksDBStore;
+ } compact_thread;
+
+ void compact_thread_entry();
+
+ void compact_range(const string& start, const string& end);
+ void compact_range_async(const string& start, const string& end);
+
+public:
+ /// compact the underlying rocksdb store
+ bool compact_on_mount;
+ bool disableWAL;
+ bool enable_rmrange;
+ void compact() override;
+
+ int tryInterpret(const string& key, const string& val, rocksdb::Options &opt);
+ int ParseOptionsFromString(const string& opt_str, rocksdb::Options &opt);
+ static int _test_init(const string& dir);
+ int init(string options_str) override;
+ /// compact rocksdb for all keys with a given prefix
+ void compact_prefix(const string& prefix) override {
+ compact_range(prefix, past_prefix(prefix));
+ }
+ void compact_prefix_async(const string& prefix) override {
+ compact_range_async(prefix, past_prefix(prefix));
+ }
+
+ void compact_range(const string& prefix, const string& start, const string& end) override {
+ compact_range(combine_strings(prefix, start), combine_strings(prefix, end));
+ }
+ void compact_range_async(const string& prefix, const string& start, const string& end) override {
+ compact_range_async(combine_strings(prefix, start), combine_strings(prefix, end));
+ }
+
+ RocksDBStore(CephContext *c, const string &path, void *p) :
+ cct(c),
+ logger(NULL),
+ path(path),
+ priv(p),
+ db(NULL),
+ env(static_cast<rocksdb::Env*>(p)),
+ dbstats(NULL),
+ compact_queue_lock("RocksDBStore::compact_thread_lock"),
+ compact_queue_stop(false),
+ compact_thread(this),
+ compact_on_mount(false),
+ disableWAL(false),
+ enable_rmrange(cct->_conf->rocksdb_enable_rmrange)
+ {}
+
+ ~RocksDBStore() override;
+
+ static bool check_omap_dir(string &omap_dir);
+ /// Opens underlying db
+ int open(ostream &out) override {
+ return do_open(out, false);
+ }
+ /// Creates underlying db if missing and opens it
+ int create_and_open(ostream &out) override;
+
+ void close() override;
+
+ void split_stats(const std::string &s, char delim, std::vector<std::string> &elems);
+ void get_statistics(Formatter *f) override;
+
+ PerfCounters *get_perf_counters() override
+ {
+ return logger;
+ }
+
+ struct RocksWBHandler: public rocksdb::WriteBatch::Handler {
+ std::string seen ;
+ int num_seen = 0;
+ static string pretty_binary_string(const string& in) {
+ char buf[10];
+ string out;
+ out.reserve(in.length() * 3);
+ enum { NONE, HEX, STRING } mode = NONE;
+ unsigned from = 0, i;
+ for (i=0; i < in.length(); ++i) {
+ if ((in[i] < 32 || (unsigned char)in[i] > 126) ||
+ (mode == HEX && in.length() - i >= 4 &&
+ ((in[i] < 32 || (unsigned char)in[i] > 126) ||
+ (in[i+1] < 32 || (unsigned char)in[i+1] > 126) ||
+ (in[i+2] < 32 || (unsigned char)in[i+2] > 126) ||
+ (in[i+3] < 32 || (unsigned char)in[i+3] > 126)))) {
+
+ if (mode == STRING) {
+ out.append(in.substr(from, i - from));
+ out.push_back('\'');
+ }
+ if (mode != HEX) {
+ out.append("0x");
+ mode = HEX;
+ }
+ if (in.length() - i >= 4) {
+ // print a whole u32 at once
+ snprintf(buf, sizeof(buf), "%08x",
+ (uint32_t)(((unsigned char)in[i] << 24) |
+ ((unsigned char)in[i+1] << 16) |
+ ((unsigned char)in[i+2] << 8) |
+ ((unsigned char)in[i+3] << 0)));
+ i += 3;
+ } else {
+ snprintf(buf, sizeof(buf), "%02x", (int)(unsigned char)in[i]);
+ }
+ out.append(buf);
+ } else {
+ if (mode != STRING) {
+ out.push_back('\'');
+ mode = STRING;
+ from = i;
+ }
+ }
+ }
+ if (mode == STRING) {
+ out.append(in.substr(from, i - from));
+ out.push_back('\'');
+ }
+ return out;
+ }
+ void Put(const rocksdb::Slice& key,
+ const rocksdb::Slice& value) override {
+ string prefix ((key.ToString()).substr(0,1));
+ string key_to_decode ((key.ToString()).substr(2,string::npos));
+ uint64_t size = (value.ToString()).size();
+ seen += "\nPut( Prefix = " + prefix + " key = "
+ + pretty_binary_string(key_to_decode)
+ + " Value size = " + std::to_string(size) + ")";
+ num_seen++;
+ }
+ void SingleDelete(const rocksdb::Slice& key) override {
+ string prefix ((key.ToString()).substr(0,1));
+ string key_to_decode ((key.ToString()).substr(2,string::npos));
+ seen += "\nSingleDelete(Prefix = "+ prefix + " Key = "
+ + pretty_binary_string(key_to_decode) + ")";
+ num_seen++;
+ }
+ void Delete(const rocksdb::Slice& key) override {
+ string prefix ((key.ToString()).substr(0,1));
+ string key_to_decode ((key.ToString()).substr(2,string::npos));
+ seen += "\nDelete( Prefix = " + prefix + " key = "
+ + pretty_binary_string(key_to_decode) + ")";
+
+ num_seen++;
+ }
+ void Merge(const rocksdb::Slice& key,
+ const rocksdb::Slice& value) override {
+ string prefix ((key.ToString()).substr(0,1));
+ string key_to_decode ((key.ToString()).substr(2,string::npos));
+ uint64_t size = (value.ToString()).size();
+ seen += "\nMerge( Prefix = " + prefix + " key = "
+ + pretty_binary_string(key_to_decode) + " Value size = "
+ + std::to_string(size) + ")";
+
+ num_seen++;
+ }
+ bool Continue() override { return num_seen < 50; }
+
+ };
+
+
+ class RocksDBTransactionImpl : public KeyValueDB::TransactionImpl {
+ public:
+ rocksdb::WriteBatch bat;
+ RocksDBStore *db;
+
+ explicit RocksDBTransactionImpl(RocksDBStore *_db);
+ void set(
+ const string &prefix,
+ const string &k,
+ const bufferlist &bl) override;
+ void set(
+ const string &prefix,
+ const char *k,
+ size_t keylen,
+ const bufferlist &bl) override;
+ void rmkey(
+ const string &prefix,
+ const string &k) override;
+ void rmkey(
+ const string &prefix,
+ const char *k,
+ size_t keylen) override;
+ void rm_single_key(
+ const string &prefix,
+ const string &k) override;
+ void rmkeys_by_prefix(
+ const string &prefix
+ ) override;
+ void rm_range_keys(
+ const string &prefix,
+ const string &start,
+ const string &end) override;
+ void merge(
+ const string& prefix,
+ const string& k,
+ const bufferlist &bl) override;
+ };
+
+ KeyValueDB::Transaction get_transaction() override {
+ return std::make_shared<RocksDBTransactionImpl>(this);
+ }
+
+ int submit_transaction(KeyValueDB::Transaction t) override;
+ int submit_transaction_sync(KeyValueDB::Transaction t) override;
+ int get(
+ const string &prefix,
+ const std::set<string> &key,
+ std::map<string, bufferlist> *out
+ ) override;
+ int get(
+ const string &prefix,
+ const string &key,
+ bufferlist *out
+ ) override;
+ int get(
+ const string &prefix,
+ const char *key,
+ size_t keylen,
+ bufferlist *out) override;
+
+
+ class RocksDBWholeSpaceIteratorImpl :
+ public KeyValueDB::WholeSpaceIteratorImpl {
+ protected:
+ rocksdb::Iterator *dbiter;
+ public:
+ explicit RocksDBWholeSpaceIteratorImpl(rocksdb::Iterator *iter) :
+ dbiter(iter) { }
+ //virtual ~RocksDBWholeSpaceIteratorImpl() { }
+ ~RocksDBWholeSpaceIteratorImpl() override;
+
+ int seek_to_first() override;
+ int seek_to_first(const string &prefix) override;
+ int seek_to_last() override;
+ int seek_to_last(const string &prefix) override;
+ int upper_bound(const string &prefix, const string &after) override;
+ int lower_bound(const string &prefix, const string &to) override;
+ bool valid() override;
+ int next() override;
+ int prev() override;
+ string key() override;
+ pair<string,string> raw_key() override;
+ bool raw_key_is_prefixed(const string &prefix) override;
+ bufferlist value() override;
+ bufferptr value_as_ptr() override;
+ int status() override;
+ size_t key_size() override;
+ size_t value_size() override;
+ };
+
+ /// Utility
+ static string combine_strings(const string &prefix, const string &value) {
+ string out = prefix;
+ out.push_back(0);
+ out.append(value);
+ return out;
+ }
+ static void combine_strings(const string &prefix,
+ const char *key, size_t keylen,
+ string *out) {
+ out->reserve(prefix.size() + 1 + keylen);
+ *out = prefix;
+ out->push_back(0);
+ out->append(key, keylen);
+ }
+
+ static int split_key(rocksdb::Slice in, string *prefix, string *key);
+
+ static bufferlist to_bufferlist(rocksdb::Slice in) {
+ bufferlist bl;
+ bl.append(bufferptr(in.data(), in.size()));
+ return bl;
+ }
+
+ static string past_prefix(const string &prefix);
+
+ class MergeOperatorRouter;
+ friend class MergeOperatorRouter;
+ int set_merge_operator(const std::string& prefix,
+ std::shared_ptr<KeyValueDB::MergeOperator> mop) override;
+ string assoc_name; ///< Name of associative operator
+
+ uint64_t get_estimated_size(map<string,uint64_t> &extra) override {
+ DIR *store_dir = opendir(path.c_str());
+ if (!store_dir) {
+ lderr(cct) << __func__ << " something happened opening the store: "
+ << cpp_strerror(errno) << dendl;
+ return 0;
+ }
+
+ uint64_t total_size = 0;
+ uint64_t sst_size = 0;
+ uint64_t log_size = 0;
+ uint64_t misc_size = 0;
+
+ struct dirent *entry = NULL;
+ while ((entry = readdir(store_dir)) != NULL) {
+ string n(entry->d_name);
+
+ if (n == "." || n == "..")
+ continue;
+
+ string fpath = path + '/' + n;
+ struct stat s;
+ int err = stat(fpath.c_str(), &s);
+ if (err < 0)
+ err = -errno;
+ // we may race against rocksdb while reading files; this should only
+ // happen when those files are being updated, data is being shuffled
+ // and files get removed, in which case there's not much of a problem
+ // as we'll get to them next time around.
+ if (err == -ENOENT) {
+ continue;
+ }
+ if (err < 0) {
+ lderr(cct) << __func__ << " error obtaining stats for " << fpath
+ << ": " << cpp_strerror(err) << dendl;
+ goto err;
+ }
+
+ size_t pos = n.find_last_of('.');
+ if (pos == string::npos) {
+ misc_size += s.st_size;
+ continue;
+ }
+
+ string ext = n.substr(pos+1);
+ if (ext == "sst") {
+ sst_size += s.st_size;
+ } else if (ext == "log") {
+ log_size += s.st_size;
+ } else {
+ misc_size += s.st_size;
+ }
+ }
+
+ total_size = sst_size + log_size + misc_size;
+
+ extra["sst"] = sst_size;
+ extra["log"] = log_size;
+ extra["misc"] = misc_size;
+ extra["total"] = total_size;
+
+err:
+ closedir(store_dir);
+ return total_size;
+ }
+
+ int set_cache_size(uint64_t s) override {
+ cache_size = s;
+ set_cache_flag = true;
+ return 0;
+ }
+
+protected:
+ WholeSpaceIterator _get_iterator() override;
+};
+
+
+
+#endif
Code Review / stor4nfv.git / blobdiff