Hi Junjiro! > Unfortunately I am unsure which patch you mentioned. Is it a > special/personal patch only for you, or generic one already merged?
Here an excerpt from your original mail (Feb. 13th, 2008): Here is a patch for the new option 'dirperm1' and 'nodirperm1.' My local and simple tests are passed, so I want you to test it more. As you can guess, if this new option has a bug, it can easily become a security hole. That is the biggest issue I am afraid. We need TESTS. It worked well! :-) (I also told you two years ago.) > I have heard that btrfs has a feature like unioning. > Are you using it? Does it work well? I do not know a unioning-feature in btrfs, but it supports snapshotting, which works great. Taking a snapshot needs no additional memory as long as you do not change any of the now two branches. The most important feature of btrfs (for my special needs in the pen-drive-distribution) is its rare use of random writes. Doing no (inplace) updates greatly enhances flash-write-performance. I had to use an union-layer-approach on pen-drives because all "old-fashioned" file-systems created much to many random writes which can't be handled well by (slow) flash-memories. Last summer I gave nilfs a try. But its garbage collector produced a lot of system hangs and sometimes even complete loss of data. It seemed that this happened only on my slow devices and were not a problem on real hard disks. Greetings, Michael ------------------------------------------------------------------------------ Download Intel® Parallel Studio Eval Try the new software tools for yourself. Speed compiling, find bugs proactively, and fine-tune applications for parallel performance. See why Intel Parallel Studio got high marks during beta. http://p.sf.net/sfu/intel-sw-dev
