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Does file name length affect huge NTFS folder indexes?

I have NTFS folders that can grow to store between 100,000 and 1,000,000 files, the upper limit discussed in this answer to NTFS performance .

My files have the following characteristics:

1) They have long file names (usually from 64 to 100 characters).

2) For many files, the leading part of the file names may be the same for the first 20-40 characters.

Do long file names significantly affect the performance of an NTFS folder index when searching for a file with its name, index fragmentation, or index growth?

NTFS folder indexes (reportedly) B-trees. I tested my software with 50,000 files, but I have a "bon voyage" test with a small outflow of the file system. Testing up to 1,000,000 will require a week to run my software non-stop.

I was thinking of writing a simulator, but before I do this, does anyone have experience with this in the real world?

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2 answers

NTFS directories are BTrees with data both inside and in leaf nodes. Since there is no “prefix key prefix”, the full text of the file name is also stored in nodes.

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