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)
}
