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 }
// SetWriteBufferSize sets the number of bytes the database will build up in // memory (backed by an unsorted log on disk) before converting to a sorted // on-disk file. func (o *Options) SetWriteBufferSize(s int) { C.rocksdb_options_set_write_buffer_size(o.Opt, C.size_t(s)) }
// SetWriteBufferSize sets the amount of data to build up in memory // (backed by an unsorted log on disk) before converting to a sorted on-disk file. // // Larger values increase performance, especially during bulk loads. // Up to max_write_buffer_number write buffers may be held in memory // at the same time, // so you may wish to adjust this parameter to control memory usage. // Also, a larger write buffer will result in a longer recovery time // the next time the database is opened. // Default: 4MB func (opts *Options) SetWriteBufferSize(value int) { C.rocksdb_options_set_write_buffer_size(opts.c, C.size_t(value)) }