back to article Microsoft fixes Windows 'idiosyncrasy' that hampered some SMB file transfers

Microsoft this month fixed what one of its staffers called an "idiosyncrasy" in the end-to-end SMB compression functionality it began rolling out last year for Windows Server 2022 and Windows 11. The upshot is: you may find your network file transfers run at least a little faster than before. Starting in June 2021, the …

  1. Neil Barnes Silver badge

    "Now we just assume if you try to compress, you want to compress."

    Well, duh... user knows best? Whatever next?

    1. Fred Daggy Bronze badge

      Re: "Now we just assume if you try to compress, you want to compress."

      The user is boss.

      But I have seen with dd and tar and gzip that compression does not always lead to faster transfer times. Might have been a move to prevent the user shooring themselves in the foot. But, I agree that the user should be allowed to do this.

      1. Sam Liddicott

        Re: "Now we just assume if you try to compress, you want to compress."

        pigz, thr multithreaded gzip zipper may help

  2. Anonymous Coward
    Anonymous Coward

    Did the unit tests pass?

    >Did the unit tests pass?

    >Yes - green light says go, unit test transfer completed successfully

    >OK. Build it zip it ship it

    And no-one checked if it was actually being compressed...

  3. Dan 55 Silver badge

    Solution is blatantly obvious

    You should be able to create an exception list in a simple UI based on the filetype. Images, videos, and compressed samples don't get compressed, the rest do if you ask for it.

  4. Wibble

    SMB's sooo sloooow...

    SMB's a shockingly lousy protocol, well, certainly as implemented by Microsoft on their operating systems. Even copying to an SMB share from a Mac it's so damn slow. Yes, it's a feature.

  5. Anonymous Coward
    Anonymous Coward


    Interesting. Wonder how content inspection services (firewalls, etc.) are going to deal with compressed files over SMB?

    1. Ken Hagan Gold badge

      Re: DLP?

      Same as they do currently when someone uses tar (with compression) to stream a directory tree to another machine.

    2. Sam Liddicott

      Re: DLP?

      It's likely encrypted anyway, is it's a Microsoft server

  6. The Man Who Fell To Earth Silver badge

    It's Microsoft

    Anyone check if the compression is lossless?

    1. Richard 12 Silver badge

      Re: It's Microsoft

      2GB is a hard limit for compress.exe, because someone used sample code rather than reading the actual spec.

      The first place I hit that was compressing PDBs - partly because Chromium is huge, but not only.

POST COMMENT House rules

Not a member of The Register? Create a new account here.

  • Enter your comment

  • Add an icon

Anonymous cowards cannot choose their icon

Other stories you might like