Example #1
0
File: db.go Project: tradia/gotable
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
}
Example #2
0
// createOptions sets the default options for creating, reading, and writing
// from the db. destroyOptions should be called when the options aren't needed
// anymore.
func (r *RocksDB) createOptions() {
	// TODO(andybons): Set the cache size.
	r.opts = C.rocksdb_options_create()
	C.rocksdb_options_set_create_if_missing(r.opts, 1)

	r.wOpts = C.rocksdb_writeoptions_create()
	r.rOpts = C.rocksdb_readoptions_create()
}
Example #3
0
// createOptions sets the default options for creating, reading, and writing
// from the db. destroyOptions should be called when the options aren't needed
// anymore.
func (r *RocksDB) createOptions() {
	// TODO(andybons): Set the cache size.
	r.opts = C.rocksdb_options_create()
	C.rocksdb_options_set_create_if_missing(r.opts, 1)
	// This enables us to use rocksdb_merge with counter semantics.
	// See rocksdb.{c,h} for the C implementation.
	r.mergeOperator = C.MakeMergeOperator()
	C.rocksdb_options_set_merge_operator(r.opts, r.mergeOperator)

	r.wOpts = C.rocksdb_writeoptions_create()
	r.rOpts = C.rocksdb_readoptions_create()
}
Example #4
0
// createOptions sets the default options for creating, reading, and writing
// from the db. destroyOptions should be called when the options aren't needed
// anymore.
func (r *RocksDB) createOptions() {
	// TODO(andybons): Set the cache size.
	r.opts = C.rocksdb_options_create()
	C.rocksdb_options_set_create_if_missing(r.opts, 1)
	// This enables us to use rocksdb_merge with counter semantics.
	// See rocksdb.{c,h} for the C implementation.
	r.mergeOperator = C.make_merge_operator()
	C.rocksdb_options_set_merge_operator(r.opts, r.mergeOperator)
	// This enables garbage collection of transaction and response cache rows.
	r.compactionFilterFactory = C.make_gc_compaction_filter_factory(unsafe.Pointer(r))
	C.rocksdb_options_set_compaction_filter_factory(r.opts, r.compactionFilterFactory)

	r.wOpts = C.rocksdb_writeoptions_create()
	r.rOpts = C.rocksdb_readoptions_create()
}
Example #5
0
// SetCreateIfMissing causes Open to create a new database on disk if it does
// not already exist.
func (o *Options) SetCreateIfMissing(b bool) {
	C.rocksdb_options_set_create_if_missing(o.Opt, boolToUchar(b))
}
Example #6
0
// SetCreateIfMissing specifies whether the database
// should be created if it is missing.
// Default: false
func (opts *Options) SetCreateIfMissing(value bool) {
	C.rocksdb_options_set_create_if_missing(opts.c, boolToChar(value))
}