3 Commits

Author	SHA1	Message	Date
Nick Craig-Wood	a492c0fb0e	local: speed up multi thread downloads by using sparse files on Windows ... Before this change rclone didn't use sparse files on Windows. This means that when you downloaded a file with multithread download it wrote the entire file with zeros first on the first write not at the start of the file. This change makes the file be sparse on Windows. Linux/macOS files were already sparse.	2020-03-09 10:55:52 +00:00
Nick Craig-Wood	9fa8c959ee	local: preallocate files on linux with fallocate(2)	2018-09-19 16:04:57 +01:00
Nick Craig-Wood	f29c6049fc	local: preallocate files on Windows to reduce fragmentation #2469 ... Before this change on Windows, files copied locally could become heavily fragmented (300+ fragments for maybe 100 MB), no matter how much contiguous free space there was (even if it's over 1TiB). This can needlessly yet severely adversely affect performance on hard disks. This changes uses NtSetInformationFile to pre-allocate the space to avoid this. It does nothing on other OSes other than Windows.	2018-09-19 16:04:57 +01:00