FUTURE POSTS

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There are posts all the way to Feb 17, 2025

RECENT SERIES

1. Challenge (77):
   03 Feb 2025 - Giving file system developer ulcer
2. Answer (13):
   22 Jan 2025 - What does this code do?
3. Production post-mortem (2):
   17 Jan 2025 - Inspecting ourselves to death
4. Performance discovery (2):
   10 Jan 2025 - IOPS vs. IOPS

RECENT COMMENTS

• Kuba, Yes, the second one should have no buffer flags. The OS makes the effects of unbuffered writes visible, but not imm...
  By Oren Eini on Challenge: Giving file system developer ulcer
• I think you've missed the `FILE_FLAG_NO_BUFFERING` in the second `CreateFile`. The documentation of `MapViewOfFile` calls ...
  By Kuba on Challenge: Giving file system developer ulcer
• Kuba, That is a very interesting find, thank you. I'm really happy that it _is_ the case, there is an emergency stash :-)
  By Oren Eini on NTFS has an emergency stash of disk space
• From: https://learn.microsoft.com/en-us/previous-versions/windows/it-pro/windows-server-2003/cc781134(v=ws.10) > To preven...
  By Kuba on NTFS has an emergency stash of disk space
• Dmitry, Yes, but this is _known_ to be a 64 bits system - since we are allocating 3GB (not possible in 64 bits). Note t...
  By Oren Eini on Answer: What does this code do?

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