This is library for the Go language to enable use of Direct IO under all supported OSes of Go (except openbsd and plan9).
Direct IO does IO to and from disk without buffering data in the OS. It is useful when you are reading or writing lots of data you don't want to fill the OS cache up with.
See here for package docs
http://godoc.org/github.com/ncw/directio
Directio is a Go library and installs in the usual way
go get github.com/ncw/directio
Instead of using os.OpenFile use directio.OpenFile
in, err := directio.OpenFile(file, os.O_RDONLY, 0666)
And when reading or writing blocks, make sure you do them in chunks of directio.BlockSize using memory allocated by directio.AlignedBlock
block := directio.AlignedBlock(directio.BlockSize)
_, err := io.ReadFull(in, block)
This is free software under the terms of MIT the license (check the COPYING file included in this package).
The project website is at:
There you can file bug reports, ask for help or contribute patches.
- Nick Craig-Wood [email protected]
- Pavel Odintsov [email protected]