bench

type Config struct {
	Dir        string        // parent directory (under the mount); a temp work dir is created here
	BigSize    int64         // total bytes for the large-file phase
	BlockSize  int           // I/O block size for the large-file phase
	SmallFiles int           // number of small files for the metadata phase
	SmallSize  int           // bytes per small file
	Fsync      bool          // fsync after each write (measure the durable path)
	DropCache  bool          // fadvise DONTNEED before the read phase (force a cold read)
	Keep       bool          // keep the work dir instead of removing it
	Timeout    time.Duration // overall deadline (0 = none)
}

type Result struct {
	WorkDir string `json:"work_dir"`

	BigBytes     int64   `json:"big_bytes"`
	WriteSeconds float64 `json:"write_seconds"`
	ReadSeconds  float64 `json:"read_seconds"`
	WriteMiBps   float64 `json:"write_mibps"`
	ReadMiBps    float64 `json:"read_mibps"`

	SmallFiles    int     `json:"small_files"`
	SmallSize     int     `json:"small_size"`
	CreateSeconds float64 `json:"create_seconds"`
	StatSeconds   float64 `json:"stat_seconds"`
	ReadSeconds2  float64 `json:"small_read_seconds"`
	CreateIOPS    float64 `json:"create_iops"`
	StatIOPS      float64 `json:"stat_iops"`
	ReadIOPS      float64 `json:"small_read_iops"`

	Fsync bool `json:"fsync"`
}