Hello everyone, I've just tagged and released Btrfs v0.9. Special thanks to Yan Zheng and Josef Bacik for their work. This release includes a number of disk format changes from v0.8 and also a small change from recent btrfs-unstable HG trees. So, if you have existing Btrfs filesystems, you will need to backup, reformat and restore to try out v0.9. You can find download links and other details here: http://oss.oracle.com/projects/btrfs/ Since v0.8: * Support for btree blocks larger than the page size. mkfs.btrfs defaults to 8k blocks, but -l and -n can be used to set the block size for leaves and nodes. Powers of 2 are required, example: mkfs.btrfs -l 32768 -n 32768 /dev/xxxx * Support for inline (packed into the btree) file data larger than the page size. Any file smaller than a btree block will probably be backed into the btree. * Xattr support (no ACLs yet) from Josef Bacik. This works for generic user xattrs and was tested with beagle among other things. * Stripe size parameter to mkfs.btrfs (-s size_in_bytes). Extents will be aligned to the stripe size for performance. * Many performance and stability fixes, especially on 32 bit x86 machines. Unfixed: ENOSPC handling. Things are much more predicable now, and Btrfs will work up until the disk is very close to full. Concurrency: Everything is still protected by a single mutex, which is held during IO. Multi-threaded benchmarks will not perform well. Database performance: Still very slow in database workloads. You can get an idea of where Btrfs is headed from the TODO list: http://oss.oracle.com/projects/btrfs/dist/documentation/todo.html -chris - 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
