Documentation
¶
Index ¶
- func AlignedBlock(blockSize int) []byte
- func DisableDirectIO(f *os.File) error
- func FadviseDontNeed(f *os.File) error
- func Fdatasync(f *os.File) error
- func IsRootDisk(diskPath string, rootDisk string) (bool, error)
- func OpenFileDirectIO(filePath string, flag int, perm os.FileMode) (*os.File, error)
- func SameDisk(disk1, disk2 string) (bool, error)
- type AllDrivesIOStats
- type DevID
- type IOStats
- type Info
Constants ¶
This section is empty.
Variables ¶
This section is empty.
Functions ¶
func AlignedBlock ¶
AlignedBlock - pass through to directio implementation.
func DisableDirectIO ¶
DisableDirectIO - disables directio mode.
func FadviseDontNeed ¶
FadviseDontNeed invalidates page-cache
func Fdatasync ¶
Fdatasync - fdatasync() is similar to fsync(), but does not flush modified metadata unless that metadata is needed in order to allow a subsequent data retrieval to be correctly handled. For example, changes to st_atime or st_mtime (respectively, time of last access and time of last modification; see inode(7)) do not require flushing because they are not necessary for a subsequent data read to be handled correctly. On the other hand, a change to the file size (st_size, as made by say ftruncate(2)), would require a metadata flush.
The aim of fdatasync() is to reduce disk activity for applications that do not require all metadata to be synchronized with the disk.
func IsRootDisk ¶
IsRootDisk returns if diskPath belongs to root-disk, i.e the disk mounted at "/"
func OpenFileDirectIO ¶
OpenFileDirectIO - bypass kernel cache.
Types ¶
type AllDrivesIOStats ¶
AllDrivesIOStats is map between drive devices and IO stats
func GetAllDrivesIOStats ¶
func GetAllDrivesIOStats() (info AllDrivesIOStats, err error)
GetAllDrivesIOStats returns IO stats of all drives found in the machine
type IOStats ¶
type IOStats struct {
ReadIOs uint64
ReadMerges uint64
ReadSectors uint64
ReadTicks uint64
WriteIOs uint64
WriteMerges uint64
WriteSectors uint64
WriteTicks uint64
CurrentIOs uint64
TotalTicks uint64
ReqTicks uint64
DiscardIOs uint64
DiscardMerges uint64
DiscardSectors uint64
DiscardTicks uint64
FlushIOs uint64
FlushTicks uint64
}
IOStats contains stats of a single drive
type Info ¶
type Info struct {
Total uint64
Free uint64
Used uint64
Files uint64
Ffree uint64
FSType string
Major uint32
Minor uint32
}
Info stat fs struct is container which holds following values Total - total size of the volume / disk Free - free size of the volume / disk Files - total inodes available Ffree - free inodes available FSType - file system type
Source Files