func (db *DB) Open(name string, createIfMissing bool, maxOpenFiles int, writeBufSize int, cacheSize int64, compression int) error { db.opt = C.rocksdb_options_create() C.rocksdb_options_set_create_if_missing(db.opt, boolToUchar(createIfMissing)) C.rocksdb_options_set_write_buffer_size(db.opt, C.size_t(writeBufSize)) C.rocksdb_options_set_max_open_files(db.opt, C.int(maxOpenFiles)) C.rocksdb_options_set_compression(db.opt, C.int(compression)) var block_options = C.rocksdb_block_based_options_create() if cacheSize > 0 { db.cache = C.rocksdb_cache_create_lru(C.size_t(cacheSize)) C.rocksdb_block_based_options_set_block_cache(block_options, db.cache) } else { C.rocksdb_block_based_options_set_no_block_cache(block_options, 1) } db.fp = C.rocksdb_filterpolicy_create_bloom(10) C.rocksdb_block_based_options_set_filter_policy(block_options, db.fp) C.rocksdb_options_set_block_based_table_factory(db.opt, block_options) cname := C.CString(name) defer C.free(unsafe.Pointer(cname)) var errStr *C.char db.db = C.rocksdb_open(db.opt, cname, &errStr) if errStr != nil { defer C.free(unsafe.Pointer(errStr)) return errors.New(C.GoString(errStr)) } db.rOpt = C.rocksdb_readoptions_create() db.wOpt = C.rocksdb_writeoptions_create() return nil }
// NewLRUCache creates a new Cache object with the capacity given. // // To prevent memory leaks, Close should be called on the Cache when the // program no longer needs it. Note: if the process is shutting down, this may // not be necessary and could be avoided to shorten shutdown time. func NewLRUCache(capacity int) *Cache { return &Cache{C.rocksdb_cache_create_lru(C.size_t(capacity))} }