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 }
// SetCache places a cache object in the database when a database is opened. // // This is usually wise to use. See also ReadOptions.SetFillCache. func (o *BlockBasedOptions) SetCache(cache *Cache) { C.rocksdb_block_based_options_set_block_cache(o.Opt, cache.Cache) }
// Control over blocks (user data is stored in a set of blocks, and // a block is the unit of reading from disk). // // If set, use the specified cache for blocks. // If nil, rocksdb will automatically create and use an 8MB internal cache. // Default: nil func (self *BlockBasedTableOptions) SetBlockCache(value *Cache) { self.cache = value C.rocksdb_block_based_options_set_block_cache(self.c, value.c) }
// SetBlockCache sets the control over blocks (user data is soptsred in a set of blocks, and // a block is the unit of reading from disk). // // If set, use the specified cache for blocks. // If nil, rocksdb will auoptsmatically create and use an 8MB internal cache. // Default: nil func (opts *BlockBasedTableOptions) SetBlockCache(cache *Cache) { opts.cache = cache C.rocksdb_block_based_options_set_block_cache(opts.c, cache.c) }