wisckey

type DB struct {
	// contains filtered or unexported fields
}

type Logger interface {
	Debug(v ...interface{})
	Debugf(format string, v ...interface{})

	Error(v ...interface{})
	Errorf(format string, v ...interface{})

	Info(v ...interface{})
	Infof(format string, v ...interface{})

	Warning(v ...interface{})
	Warningf(format string, v ...interface{})

	Fatal(v ...interface{})
	Fatalf(format string, v ...interface{})
}

type Manifest struct {
	Levels []levelManifest
	Tables map[uint64]TableManifest

	// Contains total number of creation and deletion changes in the manifest -- used to compute
	// whether it'd be useful to rewrite the manifest.
	Creations int
	Deletions int
}

type Options struct {
	// Directory to store the lsm data in. If it doesn't exist, Wisckey will
	// try to create it for you.
	LSMDir string

	// File or device to store the value log in.
	VLogPath string

	// Sync all writes to disk. Setting this to false would achieve better
	// performance, but may cause data to be lost.
	Sync bool

	// How many versions to keep per key.
	NumVersions int

	// Open the DB as read-only. With this set, multiple processes can
	// open the same Wisckey DB. Note: if the DB being opened had crashed
	// before and has vlog data to be replayed, ReadOnly will cause Open
	// to fail with an appropriate message.
	ReadOnly bool

	// DB-specific logger which will override the global logger.
	Logger Logger

	// Each table (or file) is at most this size.
	MaxTableSize int64

	// Maximum number of levels of compaction.
	MaxLevels int

	// If value size >= this threshold, only store value offsets in lsm tree.
	ValueThreshold int

	// Maximum number of tables to keep in memory, before stalling.
	NumMemtables int

	// Maximum number of Level 0 tables before we start compacting.
	NumLevelZeroTables int

	// If we hit this number of Level 0 tables, we will stall until L0 is
	// compacted away.
	NumLevelZeroTablesStall int

	// Maximum total size for L1.
	LevelOneSize int64

	// Number of compaction workers to run concurrently. Setting this to zero would stop compactions
	// to happen within LSM tree. If set to zero, writes could block forever.
	NumCompactors int
	// contains filtered or unexported fields
}

type TableManifest struct {
	Level    uint8
	Checksum []byte
}