Transactional NTFS (abbreviated TxF ) is a component introduced in Windows Vista and present in later versions of the Microsoft Windows operating system that brings the concept of atomic transactions to the NTFS file system , allowing Windows application developers to write file-output routines that are guaranteed to either succeed completely or to fail completely. Major operating system components, including System Restore , Task Scheduler , and Windows Update , rely on TxF for stability. During the development of Windows Vista , WinFS also relied on TxF for storing files.
4-650: Due to its complexity and various nuances which developers need to consider as part of application development, Microsoft has deprecated TxF and stated that it may be removed in a future version of Windows. Microsoft has strongly recommended that developers investigate using the alternatives rather than adopting the Transactional NTFS API platform which may not be available in future versions of Windows. Transactional NTFS allows for files and directories to be created, modified, renamed, and deleted atomically. Using transactions ensures correctness of operation; in
8-1071: A block of data. Transactional NTFS expands on this capability to include: With the exception of read operations, using Transactional NTFS for transactions on Encrypting File System files is not supported in Windows Vista until Service Pack 1 and Windows Server 2008 . Kernel Transaction Manager Kernel Transaction Manager ( KTM ) is a component of the Windows operating system kernel in Windows Vista and Windows Server 2008 that enables applications to use atomic transactions on resources by making them available as kernel objects. The transaction engine, which operates in kernel mode, allows for transactions on both kernel mode and user mode resources, as well as among distributed resources. The Kernel Transaction Manager intends to make it easy for application developers to do much error recovery, virtually transparently, with KTM acting as
12-555: A series of file operations (done as a transaction), the operation will be committed if all the operations succeed. In case of any failure, the entire operation will roll back and fail. Transactional NTFS is implemented on top of the Kernel Transaction Manager , which is a Windows kernel component introduced in Windows Vista that provides transactioning of objects in the kernel. The NTFS file system already supports journaling of low-level operations, such as writing
16-520: A transaction manager that transaction clients can plug into. Those transaction clients can be third-party clients that want to initiate transactions on resources that are managed by Transaction Resource Manager. The resource managers can also be third-party or built into the system. KTM is used to implement Transactional NTFS (TxF) and Transactional Registry (TxR). KTM relies on the Common Log File System (CLFS) for its operation. CLFS
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