On Tue, May 01, 2007 at 11:54:04PM -0400, Gerhard Mack wrote: > On Tue, 1 May 2007, Cabot, Mason B wrote: > > > Hello all, > > > > I've been testing the NAS performance of ext3/Openfiler 2.2 against > > NTFS/WinXP and have found that NTFS significantly outperforms ext3 for > > video workloads. The Windows CIFS client will attempt a poor-man's > > pre-allocation of the file on the server by sending 1-byte writes at > > 128K-byte strides, breaking block allocation on ext3 and leading to > > fragmentation and poor performance. This will happen for many > > applications (including iTunes) as the CIFS client issues these > > pre-allocates under the application layer. > > > > I've posted a brief paper on Intel's OSS website > > (http://softwarecommunity.intel.com/articles/eng/1259.htm). Please give > > it a read and let me know what you think. In particular, I'd like to > > arrive at the right place to fix this problem: is it in the filesystem, > > VFS, or Samba? > > > > thanks, > > Mason > > > > Just out of curiosity do other filesystems(reiser, xfs) take the same > performance hit?
XFS was also tested - it is as fast as the Windows NTFS based server..... Cheers, Dave. -- Dave Chinner Principal Engineer SGI Australian Software Group - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/