On Mon, 29 Apr 2002 18:20:18 +0200, Russell Coker <[EMAIL PROTECTED]> wrote:
>On Fri, 26 Apr 2002 22:28, [EMAIL PROTECTED] wrote: > >It's interesting to note your email address and what it implies... > >> I'm wondering if anyone out there may have some suggestions on how >> to improve the performance of a system employing fsync(). I have to be able >> to guaranty that every write to my fileserver is on disk when the client >> has passed it to the server. Therefore, I have disabled write cache on the >> disk and issue an fsync() per file. I'm running 2.4.19-pre7, reiserfs >> 3.6.25, without additional patches. I have seen some discussions out here >> about various other "speed-up" patches and am wondering if I need to add >> these to 2.4.19-pre7? And what they are and where can I obtain said >> patches? Also, I'm wondering if there is another solution to syncing the >> data that is faster than fsync(). Testing, thusfar, has shown a large >> disparity between running with and without sync.Another idea is to explore >> another filesystem, but I'm not exactly excited by the other journaling >> filesystems out there at this time. All ideas will be greatly appreciated. > >These issues have been discussed a few times, but not with any results as >exciting as you might hope for. One which was mentioned was using >fdatasync() instead of fsync(). > >One thing that has occurred to me (which has not been previously discussed as >far as I recall) is the possibility for using sync() instead of fsync() if >you can accumulate a number of files (and therefore replace many fsync()'s >with one sync() ). I can see write to file A write to file B write to file C sync might be faster than write to file A fsync A write to file B fsync B write to file C fsync C but is it possible for it to be faster than write to file A write to file B write to file C fsync A fsync B fsync C ? Toby Dickenson [EMAIL PROTECTED]
