On Thu, Jun 09, 2011 at 11:58:37PM +0100, Anton Altaparmakov wrote: > > NTFS has been doing nicely in userspace for almost half a decade. It's > > not as fast as a kernel driver _could_ be, but it's faster than _the_ > > kernel driver. > > Er, sorry to disappoint but the Tuxera NTFS kernel driver is faster > than any user space NTFS driver could ever be. It is faster than > ext3/4, too. (-: To give you a random example on an embedded system > (800MHz, 512MB RAM, 64kiB write buffer size) where NTFS in user space > achieves a maximum cached write throughput of ~15MiB/s, ext3 achieves > ~75MiB/s, ext4 ~100MiB/s and Tuxera NTFS kernel driver achieves > ~190MiB/s blowing ext4 out of the water by almost a factor of 2 and > the user space code by more than a factor of 10. File systems in user > space have their applications but high performance is definitely not > one of them... You might say that ext3/4 are journalling so not a > fair comparison so let me add that FAT32 achieves about 100MiB/s in > the same hardware/test, still about half of NTFS. Talk to Tuxera, they have a new version of their userspace FUSE version that is _much_ faster than their public one, and it might be almost as fast as their in-kernel version for some streaming loads (where caching isn't necessary or needed.) So it can be done, and done well, if you know what you are doing :) thanks, greg k-h -- To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
