similar to: Filefrag

While exploring some btrfs maintenance with respect to defragmenting I ran the following commands: # filefrag /path/to/34G.file /path/to/5.7G.file /path/to/34G.file: 2406 extents found /path/to/5.7G.file: 572 extents found Thinking those mostly static files could be less fragmented I ran: # btrfs filesystem defragment -c /path/to/34G.file # btrfs filesystem defragment -c /path/to/5.7G.file and

Hello, Does anybody know how to avoid the file fragmentation when a file is created over NFSv3? A file created locally is OK: dd bs=32k if=/dev/zero of=test count=32x1024 conv=fsync filefrag test test: 10 extents found, perfection would be 9 extents When I create the file in the same dir, but from another machine, mounted over NFS: filefrag test test: 4833 extents found, perfection would be

Hello All, I''d like to know if there is an utility like `Filefrag'' shipped with e2fsprogs on linux, which is used to fetch the extents mapping info of a file(especially a sparse file) located on ZFS? I am working on efficient sparse file detection and backup through lseek(SEEK_DATA/SEEK_HOLE) on ZFS, and I need to verify the result by comparing the original sparse file and

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 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

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! 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

Hello libvirt experts, I use libvirt (0.7.5-5ubuntu27.7) with KVM / qemu (0.12.3+noroms-0ubuntu9.2). Some machines use raw images but same use Virtualbox images (.vdi). Since last Ubuntu 10.04 LTS update I can not start the vdi-images. The "driver name= type=" option was new. <devices> <emulator>/usr/bin/kvm</emulator> <disk type='file'

Wow, it takes a really long time to make a 2TB ext2fs. Are there better-than-default options that could be used for a large filesystem? mke2fs 1.34 (25-Jul-2003) Filesystem label= OS type: Linux Block size=4096 (log=2) Fragment size=4096 (log=2) 244203520 inodes, 488382016 blocks 24419100 blocks (5.00%) reserved for the super user First data block=0 14905 block groups 32768 blocks per group,

During some discussions and handwaving, including discussions with some experts on the Xenserver/XCP storage architecture, we came up with what we think might be a plausible proposal for an architecture for communication between toolstack and driver domain, for storage at least. I offered to write it up. The abstract proposal is as I understand the consensus from our conversation. The concrete

Hello, I?m using ZFS to export some iscsi targets for the virtual box iscsi initiator. It works ok if I try to install the guest OS manually. However, I?d like to be able to import my already prepared guest os vdi images into the iscsi devices but I can?t figure out how to do it. Each time I tried, I cannot boot. It only works if I save the manually installed guest os and re-instate the same

Hi, I''ve been touring XCP and making my way around it for the last few days, and am having problems with some reasonably straightforward actions. I''ve poured a several hours into different ways of resolving the issue, but am coming up short. Here''s the main issue. The following command (plugging in a VBD to the dom0 VM), when, run, hangs for several minutes, and then

[stef204 sent me the full log since it contains sensitive information] The log says that virt-v2v cannot see anything at all on the 34.1 GB disk (as if the disk is blank). However I think the actual problem is that you've given the wrong disk type in the XML: <disk type='file' device='disk'> <driver name='qemu' type='raw'/>

The current test for .vdi files is incorrect. It tries to detect the string "<<< Sun xVM VirtualBox Disk Image >>>". However this string is just free text and .vdi files often contain different strings (ref: [1]). The correct test in this patch looks for the magic number at offset 0x40 in the file (ref: [2]). Example: Upstream 'file' without the patch on an

Hi, I am new to v2v/libguestfs. I need to convert a 30 GB virtual machine running Windows7 64 bit (a guest on a Linux system) from Virtualbox vdi format to qcow2 (or raw/img--another debate in itself) so I can use libvirt/qemu/kvm to run it and completely migrate away from Virtualbox. The vdi machine is a mission critical production environment and I cannot afford to mess it up, etc. Will keep

hi I am having several pools of xcp with NFS shared storage as default SR on each pool and i want to do following in this arrangement -I want to share vdis among all pools, i.e. for example if I want to detach a vdi from a vm in pool-1 to a vm in pool-2. so is this possible to do so? vdi export is one of the solution but i want to do it seamlessly just like it happens within the same pool or

I''m currently getting a huge number of (failed) attempts to access my home server at UDP port 27845. I think most if not all the attacks come from China or Korea. I see there is a list of Chinese and Korean networks at <http://www.countryipblocks.net/country-blocks/>. Is there a standard way of using such a list in shorewall? -- Timothy Murphy e-mail: gayleard /at/ eircom.net

Hi dear all: I have browsed almost all architecture of libGuestFs and use it on Fedora 18. It really seems greate! However, 1. No virtual disk (*.vdi, *.vmdk...) based snashot analysis code Current LibGuestFs could recognize and virtual disk format (e.g. *.VDI) and the file syste inside it (e.g. NTFS ), but find no support for snapshot virtual disk. Virtual Machine such VirtualBox

Hello folks, I reported a bug here: https://bugzilla.kernel.org/show_bug.cgi?id=63071 but I am not sure if that was the right thing to do. This is producing OOM issues and leading to system crashes (including eventual panics) with such alarming frequency that I wonder if perhaps there is something different about my setup than others. In a nutshell, I originally made the mistake of storing a

If you use the libguestfs tools which open disk images read-only (eg. virt-df), with formats such as 'vdi', then you will see an error: error: invalid value for backingformat parameter 'vdi' This is because opening a disk image read-only will try to create a qcow2 file with the original image as a backing file. However the list of permitted backing formats was very restrictive