Golang levigo.NewBloomFilter函数代码示例

原作者: [db:作者] 来自: [db:来源] 收藏邀请

本文整理汇总了Golang中github.com/jmhodges/levigo.NewBloomFilter函数的典型用法代码示例。如果您正苦于以下问题：Golang NewBloomFilter函数的具体用法？Golang NewBloomFilter怎么用？Golang NewBloomFilter使用的例子？那么恭喜您, 这里精选的函数代码示例或许可以为您提供帮助。

在下文中一共展示了NewBloomFilter函数的16个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于我们的系统推荐出更棒的Golang代码示例。

示例1: NewLevelDbShardDatastore

func NewLevelDbShardDatastore(config *configuration.Configuration) (*LevelDbShardDatastore, error) {
	baseDbDir := filepath.Join(config.DataDir, SHARD_DATABASE_DIR)
	err := os.MkdirAll(baseDbDir, 0744)
	if err != nil {
		return nil, err
	}
	opts := levigo.NewOptions()
	opts.SetCache(levigo.NewLRUCache(config.LevelDbLruCacheSize))
	opts.SetCreateIfMissing(true)
	opts.SetBlockSize(64 * ONE_KILOBYTE)
	filter := levigo.NewBloomFilter(SHARD_BLOOM_FILTER_BITS_PER_KEY)
	opts.SetFilterPolicy(filter)
	opts.SetMaxOpenFiles(config.LevelDbMaxOpenFiles)

	return &LevelDbShardDatastore{
		baseDbDir:      baseDbDir,
		config:         config,
		shards:         make(map[uint32]*LevelDbShard),
		levelDbOptions: opts,
		maxOpenShards:  config.LevelDbMaxOpenShards,
		lastAccess:     make(map[uint32]int64),
		shardRefCounts: make(map[uint32]int),
		shardsToClose:  make(map[uint32]bool),
		pointBatchSize: config.LevelDbPointBatchSize,
	}, nil
}

开发者ID:sploit，项目名称:influxdb，代码行数:26，代码来源:leveldb_shard_datastore.go

示例2: NewLeveldbCache

func NewLeveldbCache(dbname string, cacheM int) (*LeveldbCache, error) {
	opts := levigo.NewOptions()
	filter := levigo.NewBloomFilter(10)
	cache := levigo.NewLRUCache(1024 * 1024 * cacheM)
	opts.SetFilterPolicy(filter)
	opts.SetCache(cache)
	opts.SetCreateIfMissing(true)
	opts.SetWriteBufferSize(8 * 1024 * 104) // 8M
	opts.SetCompression(levigo.SnappyCompression)

	if ldb, err := levigo.Open(dbname, opts); err == nil {
		so := levigo.NewReadOptions()
		so.SetFillCache(false)
		return &LeveldbCache{
			db:    ldb,
			fp:    filter,
			cache: cache,
			Ro:    levigo.NewReadOptions(),
			Wo:    levigo.NewWriteOptions(),
			So:    so,
		}, nil
	} else {
		return nil, err
	}
}

开发者ID:shenfeng，项目名称:proxies，代码行数:25，代码来源:cache.go

示例3: initOptions

func (db *DB) initOptions(cfg *Config) *levigo.Options {
	opts := levigo.NewOptions()

	opts.SetCreateIfMissing(true)

	if cfg.CacheSize > 0 {
		db.cache = levigo.NewLRUCache(cfg.CacheSize)
		opts.SetCache(db.cache)
	}

	//we must use bloomfilter
	db.filter = levigo.NewBloomFilter(defaultFilterBits)
	opts.SetFilterPolicy(db.filter)

	if !cfg.Compression {
		opts.SetCompression(levigo.NoCompression)
	}

	if cfg.BlockSize > 0 {
		opts.SetBlockSize(cfg.BlockSize)
	}

	if cfg.WriteBufferSize > 0 {
		opts.SetWriteBufferSize(cfg.WriteBufferSize)
	}

	return opts
}

开发者ID:kingpro，项目名称:golib，代码行数:28，代码来源:db.go

示例4: NewLevelDbDatastore

func NewLevelDbDatastore(dbDir string) (Datastore, error) {
	opts := levigo.NewOptions()
	opts.SetCache(levigo.NewLRUCache(ONE_GIGABYTE))
	opts.SetCreateIfMissing(true)
	opts.SetBlockSize(TWO_FIFTY_SIX_KILOBYTES)
	filter := levigo.NewBloomFilter(BLOOM_FILTER_BITS_PER_KEY)
	opts.SetFilterPolicy(filter)
	db, err := levigo.Open(dbDir, opts)
	if err != nil {
		return nil, err
	}

	ro := levigo.NewReadOptions()

	lastIdBytes, err2 := db.Get(ro, NEXT_ID_KEY)
	if err2 != nil {
		return nil, err2
	}

	lastId := uint64(0)
	if lastIdBytes != nil {
		lastId, err2 = binary.ReadUvarint(bytes.NewBuffer(lastIdBytes))
		if err2 != nil {
			return nil, err2
		}
	}

	wo := levigo.NewWriteOptions()

	return &LevelDbDatastore{db: db, lastIdUsed: lastId, readOptions: ro, writeOptions: wo}, nil
}

开发者ID:jondot，项目名称:influxdb，代码行数:31，代码来源:leveldb_datastore.go

示例5: NewLevelDBPersistence

func NewLevelDBPersistence(storageRoot string, cacheCapacity, bitsPerBloomFilterEncoded int) (p *LevelDBPersistence, err error) {
	options := levigo.NewOptions()
	options.SetCreateIfMissing(true)
	options.SetParanoidChecks(true)

	cache := levigo.NewLRUCache(cacheCapacity)
	options.SetCache(cache)

	filterPolicy := levigo.NewBloomFilter(bitsPerBloomFilterEncoded)
	options.SetFilterPolicy(filterPolicy)

	storage, err := levigo.Open(storageRoot, options)
	if err != nil {
		return
	}

	readOptions := levigo.NewReadOptions()
	writeOptions := levigo.NewWriteOptions()
	writeOptions.SetSync(true)

	p = &LevelDBPersistence{
		cache:        cache,
		filterPolicy: filterPolicy,
		options:      options,
		readOptions:  readOptions,
		storage:      storage,
		writeOptions: writeOptions,
	}

	return
}

开发者ID:grobie，项目名称:prometheus，代码行数:31，代码来源:leveldb.go

示例6: Init

func (engine *LevelDbEngine) Init(config *proto.DBConfigs) error {
	if config == nil {
		return proto.ErrNoEngineConfig
	}
	if config.LevelDbConfigs == nil {
		config.LevelDbConfigs = DefaultLevelDbConf
	}
	options := levigo.NewOptions()
	// options.SetCreateIfMissing(config.CreateIfMissing)
	options.SetCreateIfMissing(true)
	options.SetParanoidChecks(config.LevelDbConfigs.ParanoidCheck)
	if config.LevelDbConfigs.LRUCacheSize > 0 {
		options.SetCache(levigo.NewLRUCache(config.LevelDbConfigs.LRUCacheSize))
	}
	if config.LevelDbConfigs.BloomFilterLength > 0 {
		options.SetFilterPolicy(levigo.NewBloomFilter(config.LevelDbConfigs.BloomFilterLength))
	}
	engine.config = config
	engine.dbOptions = options
	db, err := levigo.Open(engine.config.DataPath, engine.dbOptions)
	if err != nil {
		return err
	}
	engine.db = db
	return nil
}

开发者ID:dongzerun，项目名称:RationalDb，代码行数:26，代码来源:engine.go

示例7: TestLevigo

func TestLevigo(t *testing.T) {
	path := "/tmp/levigo_test_10101"
	os.RemoveAll(path)

	opts := levigo.NewOptions()
	filter := levigo.NewBloomFilter(10)
	opts.SetFilterPolicy(filter)
	opts.SetCache(levigo.NewLRUCache(1024 << 20)) // 1G
	opts.SetCreateIfMissing(true)
	if ldb, err := levigo.Open(path, opts); err == nil {
		key := []byte("test-test hwl0dsfds")
		val := []byte("value")

		if err = ldb.Put(levigo.NewWriteOptions(), key, val); err != nil {
			t.Fail()
		} else {
			ro := levigo.NewReadOptions()
			if data, err := ldb.Get(ro, key); err == nil && reflect.DeepEqual(data, val) {
				ro.SetFillCache(false)
				it := ldb.NewIterator(ro)
				it.Seek([]byte{0})
				for ; it.Valid(); it.Next() {
					log.Printf("%s => %s", it.Key(), it.Value())
				}
			} else {
				t.Fail()
			}
		}
	} else {
		t.Fail()
	}
}

开发者ID:shenfeng，项目名称:proxies，代码行数:32，代码来源:cache_test.go

示例8: NewLevelDbDatastore

func NewLevelDbDatastore(dbDir string) (Datastore, error) {
	mainDbDir := filepath.Join(dbDir, DATABASE_DIR)
	requestLogDir := filepath.Join(dbDir, REQUEST_LOG_BASE_DIR)

	err := os.MkdirAll(mainDbDir, 0744)
	if err != nil {
		return nil, err
	}
	previousLog, err := NewRequestLogDb(getRequestLogDirForDate(requestLogDir, time.Now().Add(-time.Hour*24)))
	if err != nil {
		return nil, err
	}
	currentLog, err := NewRequestLogDb(getRequestLogDirForDate(requestLogDir, time.Now()))
	if err != nil {
		return nil, err
	}

	opts := levigo.NewOptions()
	opts.SetCache(levigo.NewLRUCache(ONE_GIGABYTE))
	opts.SetCreateIfMissing(true)
	opts.SetBlockSize(TWO_FIFTY_SIX_KILOBYTES)
	filter := levigo.NewBloomFilter(BLOOM_FILTER_BITS_PER_KEY)
	opts.SetFilterPolicy(filter)
	db, err := levigo.Open(dbDir, opts)
	if err != nil {
		return nil, err
	}

	ro := levigo.NewReadOptions()

	lastIdBytes, err2 := db.Get(ro, NEXT_ID_KEY)
	if err2 != nil {
		return nil, err2
	}

	lastId := uint64(0)
	if lastIdBytes != nil {
		lastId, err2 = binary.ReadUvarint(bytes.NewBuffer(lastIdBytes))
		if err2 != nil {
			return nil, err2
		}
	}

	wo := levigo.NewWriteOptions()

	leveldbStore := &LevelDbDatastore{
		db:                 db,
		lastIdUsed:         lastId,
		readOptions:        ro,
		writeOptions:       wo,
		requestLogDir:      requestLogDir,
		currentRequestLog:  currentLog,
		previousRequestLog: previousLog}

	go leveldbStore.periodicallyRotateRequestLog()

	return leveldbStore, nil
}

开发者ID:rn2dy，项目名称:influxdb，代码行数:58，代码来源:leveldb_datastore.go

示例9: openDB

func openDB() {
	opts := levigo.NewOptions()
	cache := levigo.NewLRUCache(128 * 1024 * 1024) // 128MB cache
	opts.SetCache(cache)
	filter := levigo.NewBloomFilter(10)
	opts.SetFilterPolicy(filter)
	opts.SetCreateIfMissing(true)

	var err error
	DB, err = levigo.Open("db", opts)
	maybeFatal(err)
}

开发者ID:scozss，项目名称:setdb，代码行数:12，代码来源:db.go

示例10: NewTorrentDB

func NewTorrentDB(dir string) (*TorrentDB, error) {
	opts := levigo.NewOptions()
	filter := levigo.NewBloomFilter(10)
	opts.SetFilterPolicy(filter)
	opts.SetCreateIfMissing(true)
	defer opts.Close()
	db, err := levigo.Open(dir, opts)
	if err != nil {
		return nil, err
	}
	return &TorrentDB{db, nil, &sync.RWMutex{}}, nil
}

开发者ID:sdgoij，项目名称:TheDistributedBay，代码行数:12，代码来源:database.go

示例11: openDb

func openDb(path string) (*levigo.DB, error) {
	opts := levigo.NewOptions()
	opts.SetCreateIfMissing(true)
	opts.SetFilterPolicy(levigo.NewBloomFilter(16))
	opts.SetCache(levigo.NewLRUCache(10490000))
	opts.SetMaxOpenFiles(500)
	opts.SetWriteBufferSize(62914560)
	opts.SetEnv(levigo.NewDefaultEnv())
	dbn, err := levigo.Open(path, opts)
	if err != nil {
		return nil, fmt.Errorf("failed to open db at %s: %v\n", path, err)
	}
	return dbn, nil
}

开发者ID:uwedeportivo，项目名称:romba，代码行数:14，代码来源:clevel.go

示例12: NewRequestLogDb

func NewRequestLogDb(dir string) (*requestLogDb, error) {
	err := os.MkdirAll(dir, 0744)
	if err != nil {
		return nil, err
	}
	opts := levigo.NewOptions()
	opts.SetCache(levigo.NewLRUCache(ONE_MEGABYTE))
	opts.SetCreateIfMissing(true)
	opts.SetBlockSize(TWO_FIFTY_SIX_KILOBYTES)
	filter := levigo.NewBloomFilter(BLOOM_FILTER_BITS_PER_KEY)
	opts.SetFilterPolicy(filter)
	db, err := levigo.Open(dir, opts)
	if err != nil {
		return nil, err
	}
	return &requestLogDb{dir: dir, db: db}, nil
}

开发者ID:rn2dy，项目名称:influxdb，代码行数:17，代码来源:leveldb_datastore.go

示例13: NewLevelDBPersistence

// NewLevelDBPersistence returns an initialized LevelDBPersistence object,
// created with the given options.
func NewLevelDBPersistence(o LevelDBOptions) (*LevelDBPersistence, error) {
	options := levigo.NewOptions()
	options.SetCreateIfMissing(true)
	options.SetParanoidChecks(o.UseParanoidChecks)

	compression := levigo.SnappyCompression
	if o.Compression == Uncompressed {
		compression = levigo.NoCompression
	}
	options.SetCompression(compression)

	cache := levigo.NewLRUCache(o.CacheSizeBytes)
	options.SetCache(cache)

	filterPolicy := levigo.NewBloomFilter(10)
	options.SetFilterPolicy(filterPolicy)

	options.SetMaxOpenFiles(o.OpenFileAllowance)

	storage, err := levigo.Open(o.Path, options)
	if err != nil {
		return nil, err
	}

	readOptions := levigo.NewReadOptions()

	writeOptions := levigo.NewWriteOptions()
	writeOptions.SetSync(o.FlushOnMutate)

	return &LevelDBPersistence{
		path:    o.Path,
		name:    o.Name,
		purpose: o.Purpose,

		cache:        cache,
		filterPolicy: filterPolicy,

		options:      options,
		readOptions:  readOptions,
		writeOptions: writeOptions,

		storage: storage,
	}, nil
}

开发者ID:pjjw，项目名称:prometheus，代码行数:46，代码来源:leveldb.go

示例14: applyConfig

func applyConfig(o *levigo.Options, config map[string]interface{}) (
	*levigo.Options, error) {

	cim, ok := config["create_if_missing"].(bool)
	if ok {
		o.SetCreateIfMissing(cim)
	}

	eie, ok := config["error_if_exists"].(bool)
	if ok {
		o.SetErrorIfExists(eie)
	}

	wbs, ok := config["write_buffer_size"].(float64)
	if ok {
		o.SetWriteBufferSize(int(wbs))
	}

	bs, ok := config["block_size"].(float64)
	if ok {
		o.SetBlockSize(int(bs))
	}

	bri, ok := config["block_restart_interval"].(float64)
	if ok {
		o.SetBlockRestartInterval(int(bri))
	}

	lcc, ok := config["lru_cache_capacity"].(float64)
	if ok {
		lruCache := levigo.NewLRUCache(int(lcc))
		o.SetCache(lruCache)
	}

	bfbpk, ok := config["bloom_filter_bits_per_key"].(float64)
	if ok {
		bf := levigo.NewBloomFilter(int(bfbpk))
		o.SetFilterPolicy(bf)
	}

	return o, nil
}

开发者ID:steveyen，项目名称:blevex，代码行数:42，代码来源:config.go

示例15: NewLevelDBPersistence

func NewLevelDBPersistence(storageRoot string, cacheCapacity, bitsPerBloomFilterEncoded int) (p *LevelDBPersistence, err error) {
	options := levigo.NewOptions()
	options.SetCreateIfMissing(true)
	options.SetParanoidChecks(*leveldbUseParanoidChecks)
	compression := levigo.NoCompression
	if *leveldbUseSnappy {
		compression = levigo.SnappyCompression
	}
	options.SetCompression(compression)

	cache := levigo.NewLRUCache(cacheCapacity)
	options.SetCache(cache)

	filterPolicy := levigo.NewBloomFilter(bitsPerBloomFilterEncoded)
	options.SetFilterPolicy(filterPolicy)

	storage, err := levigo.Open(storageRoot, options)
	if err != nil {
		return
	}

	var (
		readOptions  = levigo.NewReadOptions()
		writeOptions = levigo.NewWriteOptions()
	)

	writeOptions.SetSync(*leveldbFlushOnMutate)
	p = &LevelDBPersistence{
		cache:        cache,
		filterPolicy: filterPolicy,
		options:      options,
		readOptions:  readOptions,
		storage:      storage,
		writeOptions: writeOptions,
	}

	return
}

开发者ID:bernerdschaefer，项目名称:prometheus，代码行数:38，代码来源:leveldb.go

示例16: main

func main() {
	fmt.Printf("GOMAXPROCS is %d\n", getGOMAXPROCS())
	confFile := "config.json"
	conf, err := btcplex.LoadConfig(confFile)
	if err != nil {
		log.Fatalf("Can't load config file: %v", err)
	}
	pool, err := btcplex.GetSSDB(conf)
	if err != nil {
		log.Fatalf("Can't connect to SSDB: %v", err)
	}

	opts := levigo.NewOptions()
	opts.SetCreateIfMissing(true)
	filter := levigo.NewBloomFilter(10)
	opts.SetFilterPolicy(filter)
	ldb, err := levigo.Open(conf.LevelDbPath, opts) //alpha
	defer ldb.Close()

	if err != nil {
		log.Fatalf("failed to load db: %s\n", err)
	}

	wo := levigo.NewWriteOptions()
	//wo.SetSync(true)
	defer wo.Close()

	ro := levigo.NewReadOptions()
	defer ro.Close()

	wb := levigo.NewWriteBatch()
	defer wb.Close()

	conn := pool.Get()
	defer conn.Close()

	log.Println("Waiting 3 seconds before starting...")
	time.Sleep(3 * time.Second)

	latestheight := 0
	log.Printf("Latest height: %v\n", latestheight)

	running = true
	cs := make(chan os.Signal, 1)
	signal.Notify(cs, os.Interrupt)
	go func() {
		for sig := range cs {
			running = false
			log.Printf("Captured %v, waiting for everything to finish...\n", sig)
			wg.Wait()
			defer os.Exit(1)
		}
	}()

	concurrency := 250
	sem := make(chan bool, concurrency)

	// Real network magic byte
	blockchain, blockchainerr := blkparser.NewBlockchain(conf.BitcoindBlocksPath, [4]byte{0xF8, 0xB5, 0x03, 0xDF})
	if blockchainerr != nil {
		log.Fatalf("Error loading block file: ", blockchainerr)
	}

	block_height := uint(0)
	for {
		if !running {
			break
		}

		wg.Add(1)

		bl, er := blockchain.NextBlock()
		if er != nil {
			log.Println("Initial import done.")
			break
		}

		bl.Raw = nil

		if bl.Parent == "" {
			block_height = uint(0)
			conn.Do("HSET", fmt.Sprintf("block:%v:h", bl.Hash), "main", true)
			conn.Do("HSET", fmt.Sprintf("block:%v:h", bl.Hash), "height", 0)

		} else {
			parentheight, _ := redis.Int(conn.Do("HGET", fmt.Sprintf("block:%v:h", bl.Parent), "height"))
			block_height = uint(parentheight + 1)
			conn.Do("HSET", fmt.Sprintf("block:%v:h", bl.Hash), "height", block_height)
			prevheight := block_height - 1
			prevhashtest := bl.Parent
			prevnext := bl.Hash
			for {
				prevkey := fmt.Sprintf("height:%v", prevheight)
				prevcnt, _ := redis.Int(conn.Do("ZCARD", prevkey))
				// SSDB doesn't support negative slice yet
				prevs, _ := redis.Strings(conn.Do("ZRANGE", prevkey, 0, prevcnt-1))
				for _, cprevhash := range prevs {
					if cprevhash == prevhashtest {
						// current block parent
						prevhashtest, _ = redis.String(conn.Do("HGET", fmt.Sprintf("block:%v:h", cprevhash), "parent"))
//.........这里部分代码省略.........

开发者ID:mazaclub，项目名称:btcplex，代码行数:101，代码来源:btcplex-import.go

注：本文中的github.com/jmhodges/levigo.NewBloomFilter函数示例整理自Github/MSDocs等源码及文档管理平台，相关代码片段筛选自各路编程大神贡献的开源项目，源码版权归原作者所有，传播和使用请参考对应项目的License；未经允许，请勿转载。