Difference between revisions of "Common Log File System (CLFS)"
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There are two types of logs: | There are two types of logs: | ||
| − | * dedicated logs; contains a single stream of log | + | * dedicated logs; contains a single stream of log records. |
| − | * multiplexed (or common ) logs; contains several streams of log records. | + | * multiplexed (or common) logs; contains several streams of log records. |
== Implementation == | == Implementation == | ||
| + | |||
| + | According to Wikipedia CLFS was introduced in Windows server 2003 R2. | ||
In Windows Vista the CLFS is implemented as a driver named: clfs.sys. User space equivalent functionality is provided by clfsw32.dll, which communicates to the driver by DeviceIoControl calls. | In Windows Vista the CLFS is implemented as a driver named: clfs.sys. User space equivalent functionality is provided by clfsw32.dll, which communicates to the driver by DeviceIoControl calls. | ||
| − | == | + | == Also see == |
| − | + | Windows Internals 5 by Mark E. Russinovich and David A. Solomon | |
| − | [http://en.wikipedia.org/wiki/Common_Log_File_System Wikipedia on Common Log File System] | + | == External links == |
| + | * [http://msdn.microsoft.com/en-us/library/bb986747%28VS.85%29.aspx MSDN on Common Log File System] | ||
| + | * [http://en.wikipedia.org/wiki/Common_Log_File_System Wikipedia on Common Log File System] | ||
| + | * [http://code.google.com/p/libfslibs/downloads/detail?name=Common%20Log%20File%20System%20%28CLFS%29.pdf Common Log File System (CLFS)], by the [[libfslibs|libfslibs project]], November 2010 | ||
[[Category:Logical file systems]] | [[Category:Logical file systems]] | ||
| + | [[Category:File Systems]] | ||
Latest revision as of 13:07, 30 September 2012
The Common Log File System (CLFS) is a special purpose file (sub)system designed for transaction logging and/or recovery. The CLFS is not a file system in the traditional meaning of a disk file system, but more of a logical (special purpose) file system that operates in combination with a disk file system like NTFS.
Overview
A CLFS log consists of a base log file (.blf) and one or more container files.
There are two types of logs:
- dedicated logs; contains a single stream of log records.
- multiplexed (or common) logs; contains several streams of log records.
Implementation
According to Wikipedia CLFS was introduced in Windows server 2003 R2.
In Windows Vista the CLFS is implemented as a driver named: clfs.sys. User space equivalent functionality is provided by clfsw32.dll, which communicates to the driver by DeviceIoControl calls.
Also see
Windows Internals 5 by Mark E. Russinovich and David A. Solomon
