What happens when the USN change journal reaches maximum size, How and when it is truncated below the maximum size?

Bakya ABL 21 Reputation points
2022-07-14T11:37:41.427+00:00

MaximumSize
The target maximum size for the change journal, in bytes. The change journal can grow larger than this value, but it is then truncated at the next NTFS file system checkpoint to less than this value.

From Microsoft Doc ns-winioctl-usn_journal_data_v0 , I can understand that the change journal grows larger than maximum size and then its truncated to lesser value during next NTFS file system checkpoint. I would like to know what is NTFS checkpoint and what is the time duration between 2 ntfs checkpoints.

Windows development | Windows API - Win32
{count} votes

Accepted answer
  1. Junjie Zhu - MSFT 21,646 Reputation points
    2022-07-15T06:18:54.633+00:00

    Hello,
    Welcome to Microsoft Q&A!

    If it is the system default, the interval between checkpoints should be 10s.

    Thank you.


    If the answer is the right solution, please click "Accept Answer" and kindly upvote it. If you have extra questions about this answer, please click "Comment".
    Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.

    0 comments No comments

0 additional answers

Sort by: Most helpful

Your answer

Answers can be marked as Accepted Answers by the question author, which helps users to know the answer solved the author's problem.