New submission from Ian Charnas <[EMAIL PROTECTED]>: Python currently provides os.fsync to call the POSIX 'fsync' on platforms that support it. While this function forces the operating system to force a file buffer to the storage device, data may still be waiting in the hardware write buffers on the storage device. Certain platforms (so far, only OS X) provide "fullfsync" [1] to request that storage devices flush their write buffers to the actual physical media.
This functionality is especially useful to VCS and DB developers, and already appears in SQLite [2] and MySQL [3], amongst others. This patch includes code changes to Modules/posixmodule.c that exposes os.fullfsync on supported platforms, including the appropriate documentation added to Doc/library/os.rst -Ian Charnas [1] Discussion of fsync and fullfsync on darwin platform: http://lists.apple.com/archives/darwin-dev/2005/Feb/msg00072.html [2] SQLite uses fullfsync on all platforms that define it: http://www.sqlite.org/cvstrac/fileview?f=sqlite/src/os_unix.c [3] MySQL uses fullfsync only on the darwin platform and only when F_FULLFSYNC is defined as 51, which seems to be short-sighted in that this symbol may change value in future versions of OS X. To see this code, download a mysql 5.x source snapshot and open up mysql-<version-number>/innobase/os/os0file.c ---------- components: Library (Lib) files: fullfsync.patch keywords: patch messages: 70842 nosy: icharnas severity: normal status: open title: PATCH - Providing fullfsync on supported platforms type: behavior versions: Python 2.6 Added file: http://bugs.python.org/file11072/fullfsync.patch _______________________________________ Python tracker <[EMAIL PROTECTED]> <http://bugs.python.org/issue3517> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
