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
}
// 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()
}
// 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()
}
// 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()
}
// NewWriteOptions allocates a new WriteOptions object.
func NewWriteOptions() *WriteOptions {
opt := C.rocksdb_writeoptions_create()
return &WriteOptions{opt}
}
// NewDefaultWriteOptions creates a default WriteOptions object.
func NewDefaultWriteOptions() *WriteOptions {
return NewNativeWriteOptions(C.rocksdb_writeoptions_create())
}
// NewWriteOptions creates a default WriteOptions object.
func NewWriteOptions() *WriteOptions {
return newNativeWriteOptions(C.rocksdb_writeoptions_create())
}