Linked by Eugenia Loli on Sat 3rd Dec 2005 19:41 UTC
Windows Surendra Verma, Development Manager on the Vista Kernel team, digs into Vista's new Transactional File System with Charles Torre. TxF, as it is referred to internally, is a new kernel construct that is part of an updated Vista NTFS. Surendra provides a high level overview of TxF in this video. Elsewhere, Microsoft is serious about meeting its ship date for Windows Vista during the second half of 2006.
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Thanks for all the enthusiasm :)
by malxau on Sun 4th Dec 2005 09:06 UTC
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I worked earlier in the year on Txf, and am now working on NTFS. Surendra (in the video) is my manager.

There seems to be a little confusion about a couple of points.

NTFS has always been journalled. Journalling is a very small transaction - a rename will either complete or fail, for example, you won't have two links to the same file, or no links, etc. When the volume is mounted, any half-done operations like this will be resolved. That is not new; ext3, zfs, plenty of filesystems do this.

TXF is a whole new kettle of fish. It provides for user-controlled, multiple updates, for longer periods of time. 'tummy' was exactly right with this:


copy fileb to filea
rename filea to filec
change contents of filec
create registry key HKLU/A/B

This is exactly correct. The kernel controls transactions; new applications can participate in the transaction as a Transactional Resource Manager, so that commit() can commit file changes, registry changes, or any 3rd party environment changes. The kernel understands transactions.

I can assure you, this is not a trivial undertaking.

I had a blog on this, which provides some old information; it's at I'll try to update this with some more information when I get the chance.

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