From mboxrd@z Thu Jan 1 00:00:00 1970 From: Yan Zheng Subject: Re: New experimental btrfs branch ready for testing Date: Mon, 8 Jun 2009 20:33:28 +0800 Message-ID: <3d0408630906080533n3c9c6f75sd80f47b568b99e2c@mail.gmail.com> References: <20090601210447.GC3890@think> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 To: Chris Mason , linux-btrfs@vger.kernel.org Return-path: In-Reply-To: <20090601210447.GC3890@think> List-ID: 2009/6/2 Chris Mason > > Hello everyone, > > Yan Zheng has been doing some major surgery to the back references an= d > extent allocation code, tackling bottlenecks in the code that tracks > extents. =A0It scales better with many snapshots and performs better = in > the common case of no snapshots at all. > > THE NEW CODE IS A FORWARD ROLLING DISK FORMAT CHANGE. =A0This means i= t is > compatible with the current btrfs disk format, but once you mount a > filesystem with the new code, it WILL NO LONGER BE MOUNTABLE FROM OLD > KERNELS. =A0Old kernels spit out an error message when you try them o= n new > format filesystems. > Hello, everyone I have a minor disk format change for the new format. The disk format c= hange makes snapshot dropping more efficient. The format change only affects = =46S has been balanced. If you are testing the new format, please don't use btrfs-vol -b or btrfs-vol -r. If you have already used btrfs-vol -b or btrfs-vol -r, please backup your data. Regards Yan Zheng -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" = in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html