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The code itself is still around, but the project itself is long dead. In the event, the project didn't last for long. Using a proprietary driver in open-source software is always troublesome, especially back in those bad old days. To pull this trick off, however, it used the original Windows ntfs.sys driver. The Captive NTFS driver could read and write to NTFS. You can find out for yourself soon by testing the userspace NTFS-3G against the new Linux kernel NTFS3 driver. However NTFS-3g does support it, therefore you won't have problem accessing it from Linux.NTFS-3G's creator and CTO of Tuxera, its parent company, Szabolcs Szakacsits, however, told Torvalds that a better review of NTFS-3G and the new Linux kernel NTFS driver will show the " user space ntfs-3g was about 21% faster overall than the kernel space ntfs3." That said, Szakacsits added that "Ntfs-3g always aimed for stability, features, interoperability, and portability, not for best possible performance." He also added "Userspace drivers can have major disadvantages for certain workloads" but then asksed "how relevant are those for NTFS users?" Unfortunately this new in Windows 10, therefore it can't be used in older versions. Therefore if you want to use them for back-up files you might have to run a script to compress manually after backing up or periodically after some time EXE is specified, only files compressed as executables willīe uncompressed if this is omitted, only NTFS compressed So that files added afterward will not be compressed. So that files added afterward will be compressed unless /EXE However unlike the old algorithm they don't support on-the-fly editing, so writing back to the file uncompresses it.ġ050913 : 1050913 = 1.0 to 1 sometext.txtĪn important note is that you can't set the folder to mark new files to be compressed automatically using those new algorithms, because as stated in the help part of compact (emphasis mine) Sometext.txt 1050909 : 176128 = 6.0 to 1 ġ files within 1 directories were compressed.ġ,050,909 total bytes of data are stored in 176,128 bytes. New files added to this directory will not be compressed.ġ050909 : 1050909 = 1.0 to 1 sometext.txtĮ:\test> compact /c /exe:lzx sometext.txt And despite the option name and description are all about "executable files", the option can be applied to any files The LZX algorithm is quite efficient at archiving. The recovery partition is removed and the compressed file will then be used for both executing (if it's already the latest version) and recovery purpose The idea is to compress read-only, backup and less frequently accessed system files with the highest ratio. The new algorithms are intended for the new Compact OS feature (as you can see in the /CompactOs option above). EXE Use compression optimized for executable files which are readįrequently and not modified. However Microsoft has added some new NTFS compression options and algorithms in Windows 10, so now there's a way to change the compression ratio: COMPACT ] ] Generally it's not possible, as indicated in and31415's answer. Source: File and Folder Compression Further reading When the cluster size is greater than 4 KB on an NTFS volume, none of the NTFS compression functions are available. The compression algorithms in NTFS are designed to support cluster sizes of up to 4 KB. Source: File Compression and Decompression If you compress a file that is larger than 30 gigabytes, the compression may not succeed. This means it can be used without requiring changes to existing applications. On the NTFS file system, compression is performed transparently. This is a lossless compression algorithm, which means that no data is lost when compressing and decompressing the file, as opposed to lossy compression algorithms such as JPEG, where some data is lost each time data compression and decompression occur. The file compression algorithm used by the NTFS file system is Lempel-Ziv compression. The NTFS file system volumes support file compression on an individual file basis. The LZNT1 algorithm is designed for speed, and there's no way to set a custom compression level.ġ Folders aren't actually compressed: their compression attribute only gives a default compression state to new files and subfolders. Source: FSCTL_SET_COMPRESSION control code As a result, the LZNT1 compression algorithm is used as the DEFAULT compression method. The LZNT1 compression algorithm is the only compression algorithm implemented. The compression state can be one of the following: COMPRESSION_FORMAT_NONE = 0Īny nonzero value means the target item is going to be compressed. Long answerįiles and folders 1 are compressed and decompressed by passing a FSCTL_SET_COMPRESSION control code and a compression state to the DeviceIoControl API function.
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