On Mon, Dec 23, 2024 at 10:12:32PM +0530, Sai Chaitanya Mitta wrote:
> Hi Team,
> Is there any method/tool available to explicitly mark XFS
> file extents as written? One approach I
> am aware is explicitly zeroing the entire file (this file may be even
> in hundreds of GB in size) through
> synchronous/asynchronous(aio/io_uring) mechanism but it is time taking
> process for large files,
> is there any optimization/approach we can do to explicitly zeroing
> file/mark extents as written?
Why do you need to mark them written?
--D
>
> Synchronous Approach:
> while offset < size {
> let bytes_written = img_file
> .write_at(&buf, offset)
> .map_err(|e| {
> error!("Failed to zero out file: {}
> error: {:?}", vol_name, e);
> })?;
> if offset == size {
> break;
> }
> offset = offset + bytes_written as u64;
> }
> img_file.sync_all();
>
> Asynchronous approach:
> Currently used fio with libaio as ioengine but
> results are almost same.
>
> --
> Thanks& Regards,
> M.Sai Chaithanya.
>
