similar to: Idea (laptop support) for Project_ideas

Is there a way to mix RAID 1 and 0 in different subvolumes? I am a new user to btrfs and would like to protect the important files with mirroring, but have a bulk area that is striped for speed and size. For example I want / and /home to be mirrored, but /media can just be striped as it is all data I can easily recreate. I see an item in the Project_ideas wiki entry called "Online raid

i am looking at using btrfs for a new project and i have a few questions:     * i have heard that as it currently stands Btrfs has some issues to be used as a Lustre file system; is he aware of the issues and any plans to address these and integrate Btrfs in to Lustre     * any plans to support native clustering on Btrfs     * on ZFS the ZIL is a separate device, any plans to implement a the

Hi, Will btrfs/oracle mentor students for this year''s "Google Summer of Code 2011"? I would like to work on a Windows-IFS driver which uses coLinux as a "backend" - and therefor support all Filesystems the Linux kernel has drivers for. Although not as cool as a native btrfs driver for windows, in the long term this could be even more profitable for btrfs - without

Welcome, What are perspectives on BTRFS complying with laptop-mode and stop writing to disk every 30 sec? The thread was asked several years before (http://mailman.samwel.tk/pipermail/laptop-mode/2012-February/000520.html), but time went by and maybe the situation became a little more on the bright side...? With kernel 3.8.11 I can still see with lm-profiler a lot of

Will btrfs in the future implement a read cache like zfs has with l2arc, following it''s hybrid storage concept. This would take away the hassle of choosing what and what not should be on your SSD, it would speed up the things you do most. And not what you did a lot a week ago. It should be persistent between boots so your boot sequence would benefit too. I''m sorry if this

I''ve been thinking about this for a while, from a perspective of how to make it work by allocating i-node numbers from a global pool, but yesterday I realized that offering the feature would be a bad idea because it violates the semantics of file systems. I will be happy to expand on that point if anyone disagrees with it. dln -- "It is merely a matter of persistence." --

Hello, some questions regarding btrfs deduplication. - What is the state of it? Is it "safe" to use? https://btrfs.wiki.kernel.org/index.php/Deduplication does not yield much information. - https://pypi.python.org/pypi/bedup says: "bedup looks for new and changed files, making sure that multiple copies of identical files share space on disk. It integrates deeply with btrfs so

Here is a short proposal for the hybrid storage cache idea with introduction/motivation and a bird''s eye view of an approach to implement a hybrid storage cache for btrfs. Please note that there is currently no available patches. We would like to get as much input before as possible before we start designing and implementing a solution. 1. Introduction The emerge of Solid State

Hi Thomas, >----Messaggio originale---- >Da: thomas@kupper.org >Data: 22/01/2010 10.48 >A: "Leszek Ciesielski"<skolima@gmail.com> >Cc: "linux-btrfs"<linux-btrfs@vger.kernel.org> >Ogg: Re: mount command not honoring rootflags passed > > >On 22 Jan 2010, at 10:40, Leszek Ciesielski wrote: > >> On Fri, Jan 22, 2010 at 10:30 AM,

HI all, >----Messaggio originale---- >Da: chris.mason@fusionio.com >Data: 20/06/2012 1.49 >A: "H. Peter Anvin"<hpa@zytor.com> >Cc: "linux-btrfs@vger.kernel.org"<linux-btrfs@vger.kernel.org> >Ogg: Re: Subvolumes and /proc/self/mountinfo > >> b. Are there better ways (walking the tree using BTRFS_IOC_TREE_SEARCH?) >> to accomplish

Hello all We are experimenting with btrfs and we''ve run into some problems. We are running on two Sun Storage J4400 Arrays containing a total of 48 1 TB disks. With 24 disks in the btrfs: # mkfs.btrfs /dev/sd[b-y] WARNING! - Btrfs Btrfs v0.19 IS EXPERIMENTAL WARNING! - see http://btrfs.wiki.kernel.org before using adding device /dev/sdc id 2 ... adding device /dev/sdy id 24 fs

From: Sergei Trofimovich <slyfox@gentoo.org> $ LDFLAGS=-static make gcc -lpthread -g -O0 -o btrfs btrfs.o btrfs_cmds.o scrub.o \ ctree.o disk-io.o radix-tree.o extent-tree.o print-tree.o root-tree.o dir-item.o file-item.o inode-item.o inode-map.o crc32c.o rbtree.o extent-cache.o extent_io.o volumes.o utils.o btrfs-list.o btrfslabel.o -static -luuid scrub.o: In function

This fixes: btrfs-list.c: Dans la fonction «ino_resolve» : btrfs-list.c:511: attention : déclaration implicite de la fonction « «strndup» » btrfs-list.c:511: attention : incompatible implicit declaration of built-in function «strndup» make: *** [btrfs-list.o] Erreur 1 and: btrfs.c: Dans la fonction «split_command» : btrfs.c:168: attention : déclaration implicite de la fonction « «strndup» »

Hi all, I have two multi-disk btrfs filesystems on a Arch linux 3.4.0 system. After a power failure, both filesystems refuse to mount [ 10.402284] Btrfs loaded [ 10.402714] device fsid 1e7c18a4-02d6-44b1-8eaf-c01378009cd3 devid 4 transid 65282 /dev/sdc [ 10.403108] btrfs: force zlib compression [ 10.403130] btrfs: enabling inode map caching [ 10.403152] btrfs: disk space caching is

Hey guys, I was trying to build the btrfs modules from btrfs- unstable.git/master against the Ubuntu Karmic 2.6.31 kernel, and get some failures in ref-cache.c: /home/jdong/code/kernel/btrfs-0.17/ref-cache.h:62: error: dereferencing pointer to incomplete type /home/jdong/code/kernel/btrfs-0.17/ref-cache.c: In function ‘btrfs_remove_leaf_refs’:

I made a btrfs on five disks using RAID5 (-d raid5 for mount option). When a power failure occurs, I can not remount btrfs after my system reboots. Dmesg for remount is presented as following: [ 192.713953] bio: create slab <bio-1> at 1 [ 192.716230] Btrfs loaded [ 192.717177] device fsid a0dff7ea-9354-43fd-8516-0e17f370991d devid 1 transid 6 /dev/sdb [ 192.717712] btrfs: disk space

We forget to clear inode''s dirty_bytes and EXTENT_DIRTY at the end of write. Signed-off-by: Liu Bo <liubo2009@cn.fujitsu.com> --- fs/btrfs/file.c | 1 - fs/btrfs/inode.c | 5 ++++- 2 files changed, 4 insertions(+), 2 deletions(-) diff --git a/fs/btrfs/file.c b/fs/btrfs/file.c index e7872e4..3f3b4a8 100644 --- a/fs/btrfs/file.c +++ b/fs/btrfs/file.c @@ -1150,7 +1150,6 @@

Hi! The problem is that the BTRFS raid10 filesystem without any understandable cause refuses to mount. Here is dmesg output: [77847.845540] device label linux-btrfs-raid10 devid 3 transid 45639 /dev/sdc1 [77848.633912] btrfs: allowing degraded mounts [77848.633917] btrfs: enabling auto defrag [77848.633919] btrfs: use lzo compression [77848.633922] btrfs: turning on flush-on-commit [77848.658879]

Since 2.6.29-rc1 contains btrfs I had to try it. However the loopback mount of my btrfs formatted file fails: user@host:~$ dd if=/dev/zero of=btrfs.img bs=1MB count=512 user@host:~$ mkfs.btrfs btrfs.img fs created label (null) on btrfs.img nodesize 4096 leafsize 4096 sectorsize 4096 size 488.28MB Btrfs v0.16+da35ab2b0b54 user@host:~$ sudo mount -t btrfs -o loop btrfs.img /mnt/btrfs mount:

I''m currently playing around with native btrfs multi-device support in systemd. There might be a few "hotplug issues" to solve, here is the first one: A mounted (otherwise unused) multi-device volume (USB multi-slot card reader), hangs at: $ umount /mnt with (fedora) kernel 3.6.0-0.rc5.git0.1.fc18.x86_64 Any idea what to look for or what to try? Thanks, Kay [