On Fri, 2008-06-20 at 09:07 -0600, Joe Peterson wrote: > Josef Bacik wrote: > > Database apps that do their own complicated stuff to make sure everything > > makes > > it to the disk properly who dont want the extra overhead of checksumming. > > I do see the benefit of that, if indeed the DB does end-to-end checking. > Then again, I could almost see that perhaps making the setting based on > something at the subvolume level (not per-file level) might be even > better for that case. >
But, it'll be common to mix database files with files that you do want checksummed in the same volume. This is an admin level decision, and we can easily provide knobs to turn it on/off. So, I think the ioctl is really important and we'll just document it as best we can. Long term, these might end up getting folded into chattr, so I think Zach has a good point about folding them into a single change-file-attributes ioctl. -chris -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html
