similar to: BTRFS, getting darn slower everyday

As of the latest updates to anaconda and grub2 for Fedora 18, it is now possible to install with /boot as a btrfs subvolume. The way that grub2 is handling this is the "reach down" to the files it needs as if the subvolume was a directory. Is this OK? At this point I am not worried about snapshots or any other complexities. If the subvolume name is known. should grub2 be able to

Hi folks, I''m using Ubuntu 12.10 Quantal with # uname -r 3.5.0-24-generic And it seems I cannot defrag : # filefrag /boot/initrd.img-3.5.0-24-generic /boot/initrd.img-3.5.0-24-generic: 3 extents found # btrfs filesystem defrag /boot/initrd.img-3.5.0-24-generic # echo $? 20 # filefrag /boot/initrd.img-3.5.0-24-generic /boot/initrd.img-3.5.0-24-generic: 3 extents found Any clue

Hi there, I have a system on which btrfsck gives the following output... I don''t understand the meaning of the reported errors, so any clue would be appreciated. Is this something I should worry about, or not ? Would I be advised to try "--repair" ? (Last time I tried this one, it completely b0rked a filesystem, beyond repair, and my wife would kill me ifever I trash this one,

Hi guys, After having received strong advice from the people in this list to upgrade my kernel to the latest one, I have installed 3.8.0-14-generic #24-Ubuntu SMP x86_64 on several (4) machines. In the hope of improving systems speed I had also removed all snapshots then defragged the FSes - the snapshots have been recreated since, as I use the excellent SuSE "Snapper" tool. But well,

Hi list, I don''t trust theoretical benchmarks that much and prefer "real-life benchs" on the occasion, so here''s mine: Given 4 laptops, the most powerful of which was running BTRFS and the others ext3 or ext4, all machines running Ubuntu 11.04 Natty 32-bit with a stock Ubuntu 2.6.38-11 kernel, all machines were given the following FS-intensive task : - Upgrade

Hi! Today I converted my /home from Ext4 to BTRFS by reformatting and copying all over again. I created the filesystem with -l 16384 -n 16384 -d single -m single on an logical volume Intel SSD 320 and mount with compress=lzo,spacecache. Current state: merkaba:~> btrfs filesystem show failed to read /dev/sr0 Label: ''home'' uuid: […] Total devices 1 FS bytes used

Kernel 3.1-rc8 btrfs-progs-0.19 mount options: noatime,autodefrag (space_cache is enabled) There are snapshots present on the filesystem. When I do a btrfs fi defrag on a file, the file becomes much more fragmented. The end result can be a file with 20k times more fragments than before. Initially I thought the extents were just smaller but were next to each other, so I checked with both

Hi all, i am new on btrfs, i am testing KVM on btrfs (host: kernel x86-64 3.5.3), the performance is reasonable. I have two question on defrag, can someone help me? 1. According to btrfs wiki, defragment a COW file will produce two unrelated files. Does it apply to the "autodefrag" mount option? 2. Is there any command for the fragmentation status of a file/dir ? e.g. fragment

Rename no_space_cache option to nospace_cache to be more consistent with the rest, where the simple prefix ''no'' is used to negate an option. The option has been introduced during the -rc1 cycle and there are has not been widely used, so it''s safe. Signed-off-by: David Sterba <dsterba@suse.cz> --- fs/btrfs/super.c | 4 ++-- 1 files changed, 2 insertions(+), 2

Hi list, I have a few large image files (VMware workstation VMDKs and TrueCrypt containers) which I routinely back up over the network to a btrfs raid10 volume via bigsync (https://code.google.com/p/bigsync/). The VM images in particular get really fragmented due to CoW, which is expected. I haven''t yet switched off CoW on the backups directory mainly to experiment and see what

In btrfs if we mount with "compress" we have no way to disable compressing by remounting (mount -o remount /mnt/btrfs), only by unmounting and mounting without "compress". This patch adds "nocompress" mount option which can be used to remount the filesystem without compression: # mount -o remount,nocompress /mnt/btrfs This option is usefull in cases when we have a

I set the C (NOCOW) and z (Not_Compressed) flags on a folder but the extent counts of files contained there keep increasing. Said files are large and frequently modified but not changing in size. This does not happen when the filesystem is mounted with nodatacow. I''m using this as a workaround since subvolumes can''t be mounted with different options simultaneously. ie. one with

What are the recommendations for running KVM images on BTRFS systems using kernel 3.4?  I saw older posts on the web complaining about poor performance, but I know a lot of work has gone into btrfs since then.  There also seemed to be the nocow option, but I didn''t find anything that said it actualy helped. Anybody have ideas? Thanks, Matt -- To unsubscribe from this list: send the line

Hi folks, Finaly following general advice received here, I could manage to upgrade all of my BTRFS boxes to the next Ubuntu Raring kernel (3.8.0-9), so I assume I now have something decently new ;-) I''m now looking for quota support, but, even though the wiki page and Wikipedia english page says BTRFS now has quota support, I couldn''t find any documentation or specific

After running ceph on XFS for some time, I decided to try btrfs again. Performance with the current "for-linux-min" branch and big metadata is much better. The only problem (?) I''m still seeing is a warning that seems to occur from time to time: [87703.784552] ------------[ cut here ]------------ [87703.789759] WARNING: at fs/btrfs/inode.c:2103

Hi, I have btrfs volume, shared via samba. I have a directory of documents that I want to backup on my server. win7 reports a maximum of ~3.10MB/s transfer transferring the same directory on a ext4 samba share I get 25MB/s + Any ideas? Is it like that because of how btrfs works and is setup? Thanks, -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body

I would like to compute the MC test (rfm.test) available in the package MarkedPointProcess (for the data BITOEK for example) in order to test the dependence between the marks and their locations. Why the syntax of rfm.test is false here? I have the message : ****************************** ML WARNING! Forbidden values! -- if there are too many warnings try narrower lower and upper bounds for the

Hello Hendrik Can you help input 2 commands 'mount' and 'df -TPh' on OMV, and post the output to us, thank you. -- Regards, Jones Syue | ??? QNAP Systems, Inc.

Hi, I''ve been using btrfs for my root partition for about a month on archlinux and recently Ive started using the i3 window manager and starting X manually and I now boot to run level 3 (multi-user.target for systemd) and Ive noticed that booting archlinux on a btrfs root, there is a lot off hdd chatter after the login prompts are displayed, which doesnt happen with ext4 on root, so I

The reason the deadlock is that: Task Btrfs-cleaner umount() down_write(&s->s_umount) sync_filesystem() do auto-defragment and produce lots of dirty pages close_ctree() wait for the end of btrfs-cleaner start_transaction reserve space shrink_delalloc() writeback_inodes_sb_nr_if_idle()