similar to: Please How do I calculate the offset of a file within a ext3 partition

Hi, I need clarifications on how to sell linux tools. (Though i' not sure how people ready to buy it :) ) I have written few tools and planning to write more(by giving up current non-linux & boring job). I want to know,which license will allow me to sell tools/softwares? (I hope to sell the products through online) Cheers, Lakshmipathi.G www.giis.co.in

When designing a filesystem, is fragmentation really an issue if access to the disk can be done using scatter-gather DMA techics ?

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

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

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

Is there a way to find the holes in sparse files, other than assuming contiguous blocks of zeroes are holes? Thanks, Sean

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

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

On Sat, Nov 7, 2015 at 5:03 AM, Richard W.M. Jones <rjones@redhat.com> wrote: > How about 'strace mkfs.ext2 ..' and see if any system calls are > returning errors. That would show you whether nbd-client is throwing > errors away, or whether mkfs is getting the errors and ignoring them > (seems pretty unlikely, but you never know). > > After that, it'd be down

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

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 I have a virtualbox image of ubuntu hardy. I did filefrag and i got this hardy.vdi: 73 extents found, perfection would be 69 extents Why does it say perfection would be 69 extents. Shouldnt it be 1 extent?

What happens if you set an individual file inside a subvolume as nocow (chattr +C) and then take a snapshot of that subvolume and modify the file in both? Will btrfs now ignore the nocow attribute completely or will it do "as few copies as possible"? (I''d love to know if it''s possible to visualize the fragmentation of a single file.) -- To unsubscribe from this list:

Hello, One of our box running domain controller (Samba4) and DNS/DHCP (Bind 9.8 and default dhcpd) keeps getting high memory used by Samba. As a workaround we do following steps. 1) Restart of Samba = Mem utilization goes back down but quickly returns to high levels (a couple hours) 2) Restart of named = mem utilization goes down and slowly rises again to high levels (days) The

Folks, I am terribly puzzled by an issue reported as bug 2381 [http://bugs.centos.org/view.php?id=2381] ? definitely an upstream bug, as it does the same under X/OS 5 and StartCom 5. Simply put: Hibernation fails with horrendous I/O errors after swsusp starts dumping to swap. What bugs me is that hibernating from the CentOS 5 LiveCD *works*!!! (on the same hardware) How could I investigate to

https://bugzilla.samba.org/show_bug.cgi?id=11588 Bug ID: 11588 Summary: missing option: preallocate for all files except for sparse Product: rsync Version: 3.1.2 Hardware: x64 OS: Linux Status: NEW Severity: enhancement Priority: P5 Component: core

Someone recently posted the following statement midway down the page at http://forums.gentoo.org/viewtopic-t-305871-postdays-0-postorder-asc-highlight-ext3+ordered+data-start-25.html >You don't need to defragment ext2/ext3 because as you use the >filesystem file blocks and inodes are moved around and reallocated >to keep the data nearly contiguous. It's not perfect, but it

Let me preface this by saying "Yes, I know *nix filesystems don't need to worry about fragmentation". That said, is there a way to check the overall level of fragmentation of a live ext3 filesystem? I know about filefrag, but that's for specific files. And I think e2fsck tells you, but only if you take the filesystem offline for the scan. Is there anything that will give

Hello, my name is Viktor. I use kernel-2.6.38.5 as dom0. I can''t get access to console dom0. There is a blank screen after xen-4.1.0.gz loading. But dom0 is loaded and I have got it from ssh and it works fine. I just see nothing at monitor screen. Why? May be I have error in my grub.conf settings, please help! My video card: ATI Technologies Inc M92 [Mobility Radeon HD 4500 Series]

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,