Re: btrfs snapshots (of root file system)?

e a snapshot of the root file system so that I could roll back after software updates. Unfortunately, that won't work because there won't be snapshots of the MBR and of the UEFI partition, and using clonezilla to copy the volume didn't seem to be a very idea because it's on hardwar

Re: btrfs snapshots (of root file system)?

ack to a previous > state if necessary. > > There doesn't seem to be a command to create snapshots but only > subvolumes? How does a subvolume turn into a snapshot? (The root > file system is, of course, not on a subvolume.) Everything in btrfs is a suvolume, including the

Fwd: btrfs snapshots (of root file system)?

Try ext4 All the best Keith BAINBRIDGE +61 (0)447 667 468 keithr...@gmail.com UTC + 10 >From my Apad -- Forwarded message - From: Keith Bainbridge Date: Mon, 2 Oct 2023, 20:32 Subject: Re: btrfs snapshots (of root file system)? To: debian-user@lists.debian.org I

Re: btrfs snapshots (of root file system)?

; with btrfs, how do I make a snapshot of the root file system? The > purpose is to update software and being able to go back to a previous > state if necessary. > > There doesn't seem to be a command to create snapshots but only > subvolumes? How does a subvolume turn into a

Re: btrfs snapshots (of root file system)?

> > > > There doesn't seem to be a command to create snapshots but only > > subvolumes? How does a subvolume turn into a snapshot? (The root > > file system is, of course, not on a subvolume.) > > > > How do I merge snapshots? IIRC, when you remove a Z

Re: btrfs snapshots (of root file system)?

hw wrote: > Hi, > > with btrfs, how do I make a snapshot of the root file system? The > purpose is to update software and being able to go back to a previous > state if necessary. > > There doesn't seem to be a command to create snapshots but only > subvolumes? H

btrfs snapshots (of root file system)?

Hi, with btrfs, how do I make a snapshot of the root file system? The purpose is to update software and being able to go back to a previous state if necessary. There doesn't seem to be a command to create snapshots but only subvolumes? How does a subvolume turn into a snapshot? (The root

btrfs: snapshots of directories?

Hi, I want to make a snapshot of a directory which resides on a btrfs file system. So I was reading this guide: https://www.linux.com/training-tutorials/how-create-and-manage-btrfs-snapshots-and-rollbacks-linux-part-2/ IIUC it requires that what you want to make a snapshot of must be a

Re: Explaining snapshots (for backup)

On 2022-11-16, David Christensen wrote: > > Of course, a reverse operation is desirable -- e.g. "restore". Very, very desirable.

Re: Explaining snapshots (for backup)

On 11/15/22 10:32, to...@tuxteam.de wrote: [1] https://btrfs.wiki.kernel.org/images-btrfs/6/68/Btree_TOS.pdf Thank you for the link. Thank you IBM for making that paper public (and not behind a pay wall). David

Re: Explaining snapshots (for backup)

suppose it wouild be possible to do something like this at a block level, that is copying only blocks of a file which have changed. (Not sure which commands might help me do that, but I don't think I'd really be interested in doing that.) I also hear (i.e., read) statements from which

Re: Explaining snapshots (for backup)

ut I now see the explanation > that filesystems that can do snapshots are COW and now things make sense. The underlying mechanism for all that is, most of the time, some variant of a B-tree, where you just build up a modified B-tree up from the leaves up to the root. The new root is just the ne

Re: Explaining snapshots (for backup)

pa...@quillandmouse.com wrote: > On Tue, 15 Nov 2022 09:40:11 -0500 > Dan Ritter wrote: > > > rhkra...@gmail.com wrote: > > > I'm not really clear on the concept of a snapshot (for backup) -- > > > I've done a little googling but haven't found an explanation that > > > "satisfies" me. > > > >

Re: Explaining snapshots (for backup)

vering the state of a system. > > Let's assume, as the OP says, you do an original full backup. A > snapshot ought to record either the contents of all the files which > have changed, or record the delta of each file which has changed. > Thus, you'd be able to recover a fil

Re: Explaining snapshots (for backup)

I don't think I'd > really be interested in doing that.) > > I also hear (i.e., read) statements from which I infer that some > snapshots included only the metadata of the files (or blocks???), but > I'm not sure of the value of either of those to me -- how can you >

Re: Explaining snapshots (for backup)

Intentionally top-posting; Thanks to all who replied, I think I have a pretty good understanding and I think the biggest thing I was missing was how a file could be reconstructed using only the metadata, but I now see the explanation that filesystems that can do snapshots are COW and now

Re: Explaining snapshots (for backup)

sired, then the affected old block loses its active job to a copy which is created in a previously unused block. The write operation then happens on the new block, while the old block remains valid only in the snapshot. > I also hear (i.e., read) statements from which I infer that some snapshots &

Re: Explaining snapshots (for backup)

On Tue, 15 Nov 2022 09:40:11 -0500 Dan Ritter wrote: > rhkra...@gmail.com wrote: > > I'm not really clear on the concept of a snapshot (for backup) -- > > I've done a little googling but haven't found an explanation that > > "satisfies" me. > > > > Starting from a beginning, I suppose I could c

Re: Explaining snapshots (for backup)

rhkra...@gmail.com wrote: > I'm not really clear on the concept of a snapshot (for backup) -- I've done a > little googling but haven't found an explanation that "satisfies" me. > > Starting from a beginning, I suppose I could copy the entire contents of > whatever I wanted to make a snapshot o

Re: Explaining snapshots (for backup)

Am 15.11.2022 um 15:27 schrieb rhkra...@gmail.com: > I'm not really clear on the concept of a snapshot (for backup) -- I've done a > little googling but haven't found an explanation that "satisfies" me. I am familiar with snapshots on zfs. There might be different

Explaining snapshots (for backup)

omething like this at a block level, that is copying only blocks of a file which have changed. (Not sure which commands might help me do that, but I don't think I'd really be interested in doing that.) I also hear (i.e., read) statements from which I infer that some snapshots inclu

Re: Debian Buster: Is it safe to use on autodefrag on a Btrfs filesystem that is used for (Restic) backup only with no Btrfs snapshots or subvolumes?

This. From the Btfrs Gotchas page: Files with a lot of random writes can become heavily fragmented (1+ > extents) causing thrashing on HDDs and excessive multi-second spikes of CPU > load on systems with an SSD or large amount a RAM. > >- On servers and workstations this affects databases

Re: Debian Buster: Is it safe to use on autodefrag on a Btrfs filesystem that is used for (Restic) backup only with no Btrfs snapshots or subvolumes?

Stefan Monnier writes: >> Is it safe to use autodefrag for my use case? > > It sounds like it might be "safe" (the text doesn't actually say it's > unsafe, but just that it has downsides). > > I do wonder why you'd want to do that, tho. Fragmentation is typically > something that clueless Window

upgrade from stretch to buster killed my KVM snapshots

Apparently internal snapshots of a qcow2-based vm are problematic when the vm boots from UEFI. I found that out when my nightly snapshots stopped working after I upgraded a server from stretch to buster. Testing the effective line of the script with actual values, I got this result

Re: Debian Buster: Is it safe to use on autodefrag on a Btrfs filesystem that is used for (Restic) backup only with no Btrfs snapshots or subvolumes?

> Btrfs is not my thing, but I looked at the reference that was posted, > and the Gotchas referred to within, and they mention log files having > tens of thousands of extents. Doesn't sound very good. Maybe it doesn't sound very good, but except for very specific circumstances, it makes no visible

Re: Debian Buster: Is it safe to use on autodefrag on a Btrfs filesystem that is used for (Restic) backup only with no Btrfs snapshots or subvolumes?

On Mon 29 Jul 2019 at 14:07:25 (-0400), Stefan Monnier wrote: > > Is it safe to use autodefrag for my use case? > > It sounds like it might be "safe" (the text doesn't actually say it's > unsafe, but just that it has downsides). > > I do wonder why you'd want to do that, tho. Fragmentation is ty

Re: Debian Buster: Is it safe to use on autodefrag on a Btrfs filesystem that is used for (Restic) backup only with no Btrfs snapshots or subvolumes?

> Is it safe to use autodefrag for my use case? It sounds like it might be "safe" (the text doesn't actually say it's unsafe, but just that it has downsides). I do wonder why you'd want to do that, tho. Fragmentation is typically something that clueless Windows users worry about (a left over fro

Debian Buster: Is it safe to use on autodefrag on a Btrfs filesystem that is used for (Restic) backup only with no Btrfs snapshots or subvolumes?

single subvolume, no Btrfs snapshots *Goal:* To store rotating snapshots of some folders in /home/MyUsername/ (located on SSD) on the Btrfs filesystem located on the 2 HDDs. I've chosen Restic <https://restic.net/> for this since rsnapshot's developer switched to Borg and Borg does

Re: LVM setup with snapshots

On 11-05-2018 21:46, Forest Dean Feighner wrote: > I really didn't prepare for lvm. I never used lvm before this so had > no idea of lvm before. > > Snapshots sound like an awesome idea. > > I would like to do a configured base install, create a snapshot, and > m

Re: LVM setup with snapshots

I really didn't prepare for lvm. I never used lvm before this so had no idea of lvm before. Snapshots sound like an awesome idea. I would like to do a configured base install, create a snapshot, and modify (fork), the base for different things. With 20/20 hindsight. The default doesn'

Re: LVM setup with snapshots

On Fri, May 11, 2018 at 8:15 AM, Greg Wooledge wrote: > On Fri, May 11, 2018 at 09:20:32AM +0200, Pascal Hambourg wrote: > > > To me, it seems me the partition is too large to to reduce for > snapshots. > > > > What do you mean ? > > Did you allocate all the av

Re: LVM setup with snapshots

On Fri, May 11, 2018 at 09:20:32AM +0200, Pascal Hambourg wrote: > > To me, it seems me the partition is too large to to reduce for snapshots. > > What do you mean ? > Did you allocate all the available space in the volume group to the logical > volumes ? Creating snapshots req

Re: LVM setup with snapshots

wi-ao 463.52g swap_1 build-vg -wi-ao 2.00g I used the default stretch of an lvm partition with the gnome. To me, it seems me the partition is too large to to reduce for snapshots. What do you mean ? Did you allocate all the available space in the volume group to the logical vo

LVM setup with snapshots

s too large to to reduce for snapshots. I'm prolly not 'getting' lvm yet. What would be a good layout for a stretch install doing lvm snapshots? Thanks Forest "I've bin kinda lazy lately'

Re: any mirror/site where I can download Emacs snapshots?

On Mon, Oct 26 2015,Teemu Likonen wrote: > Sivaram Neelakantan [2015-10-27 00:04:44+05:30] wrote: > >> I don't want to clone the whole repository, would a shallow clone also >> work? > > You can use "git clone --depth 1" to get just the latest revision. Most > of the space is taken by the files, t

Re: any mirror/site where I can download Emacs snapshots?

Sivaram Neelakantan [2015-10-27 00:04:44+05:30] wrote: > I don't want to clone the whole repository, would a shallow clone also > work? You can use "git clone --depth 1" to get just the latest revision. Most of the space is taken by the files, though, not the history. Depth-1 clone takes 178 MB a

Re: any mirror/site where I can download Emacs snapshots?

On Sun, Oct 25 2015,Teemu Likonen wrote: > Sivaram Neelakantan [2015-10-25 20:00:35+05:30] wrote: > >> Else I'll have to build from scratch I guess. > > That's a good choice and nothing to be afraid of. In Debian 8 it would > go like this: > > > sudo apt-get install git build-essential libgtk2

Re: any mirror/site where I can download Emacs snapshots?

El 25/10/15 a las 08:30, Sivaram Neelakantan escribió: I'm running debian test and I'd like to use the latest Emacs snapshots if anyone has built them at all. Is there a canonical website where I can get deb packages of the same, please? Else I'll have to build from scratch I

Re: any mirror/site where I can download Emacs snapshots?

checkinstall would be a good idea if you want to be able to remove/upgrade the program. https://wiki.debian.org/CheckInstall On 10/25/15, Teemu Likonen wrote: > Sivaram Neelakantan [2015-10-25 20:00:35+05:30] wrote: > >> Else I'll have to build from scratch I guess. > > That's a good choice and

Re: any mirror/site where I can download Emacs snapshots?

Sivaram Neelakantan [2015-10-25 20:00:35+05:30] wrote: > Else I'll have to build from scratch I guess. That's a good choice and nothing to be afraid of. In Debian 8 it would go like this: sudo apt-get install git build-essential libgtk2.0-dev \ libgnutls28-dev libfontconfig1-dev lib

any mirror/site where I can download Emacs snapshots?

I'm running debian test and I'd like to use the latest Emacs snapshots if anyone has built them at all. Is there a canonical website where I can get deb packages of the same, please? Else I'll have to build from scratch I guess. sivaram --

snapshots

y way to take and restore such snapshots from the Linux host? It sure would be useful. Thanks. -- To UNSUBSCRIBE, email to debian-user-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org Archive: http://lists.debian.org/loom.20110414t154015...@post.gmane.org

backing up with rsnapshot and LVM snapshots

Hi, I've been backing up using rsnapshot directly on my running system. I recently decided to begin doing this properly, and to use LVM's snapshot facility, so I wrote a basic, simple script to encapsulate the rsnapshot call with LVM snapshot creation, mounting, umounting, and removal: #! /bin/s

Re: LVM snapshots are not backups (was: Re: Virtualization - what do You recommend?)

I believe the point of the LVM Snapshot is to make an unchanging version of your LV that can be backed up without risk of changes occurring to the volume during the backup process. You still have to do the actual backup as usual. -- To UNSUBSCRIBE, email to debian-user-requ...@lists.debian.org

Re: LVM snapshots are not backups (was: Re: Virtualization - what do You recommend?)

On Tue, Feb 02, 2010 at 09:32:17AM -0600, Boyd Stephen Smith Jr. wrote: > In <20100202135559.ga5...@ra.ncl.ac.uk>, Jon Dowland wrote: > You backups should be protection against at least: (a) user error, (b) normal > hardware failure, and (c) disaster. I find the website

LVM snapshots are not backups (was: Re: Virtualization - what do You recommend?)

In <20100202135559.ga5...@ra.ncl.ac.uk>, Jon Dowland wrote: >On Tue, Feb 02, 2010 at 12:19:49PM +0100, Rafał Radecki >wrote: >> I plan to install Windows 2008 as a guest. I want to use >> something like LVM snapshots for backups. > >Just to pick up on this point, I

merging LVM snapshots back to origin

Does anybody know the status of this wish item? For the time being, on a squeeze server, I see that lvconvert can only convert a linear volume to a snapshot and not vice versa. G. smime.p7s Description: S/MIME Cryptographic Signature

Re: slow backup using lvm snapshots and tar

Israel Garcia wrote: Hi list: I'm using this command to create s snapshot of every LV's server, mount the LV, make a TGZ to a shared folder (NFS), then umount LV image and remove snapshot LV. The problem is tar backup is extremely slow (it takes 3 hours to make backup of all servers). This is

Re: slow backup using lvm snapshots and tar

On 09-11-05 01:18:48, Israel Garcia wrote: > Hi list: > > I'm using this command to create s snapshot of every LV's server, > mount the LV, make a TGZ to a shared folder (NFS), then umount LV > image and remove snapshot LV. The problem is tar backup is extremely > slow (it takes 3 hours to make b

Re: Purchase weekly snapshots of testing on DVDs?

On Thu, Nov 27, 2008 at 08:30:01AM -0700, Rick Morneau wrote: > I live in a rural area and have a dialup connection, so it's > not practical for me to download the weekly iso files for > testing. Does anyone know where I can buy a reasonably > recent copy on DVDs? From that point on I can upgrade

Purchase weekly snapshots of testing on DVDs?

I live in a rural area and have a dialup connection, so it's not practical for me to download the weekly iso files for testing. Does anyone know where I can buy a reasonably recent copy on DVDs? From that point on I can upgrade via my dialup connection. I suppose I could wait until lenny become

Re: Best way to find a version in snapshots depending on existing install

David Goodenough said: I could simple download each version in turn from snapshots and try it, but that might be time consuming. Is there a way of forming a question to snapshots which would tell me which to install? Alternatively is there an easy way to list the dependencies of each version

Re: Best way to find a version in snapshots depending on existing install

not currently an option so I > want to try to do it using the existing packages. > > I could simple download each version in turn from snapshots and try it, but > that might be time consuming. Is there a way of forming a question to > snapshots which would tell me which to install?

Best way to find a version in snapshots depending on existing install

option so I want to try to do it using the existing packages. I could simple download each version in turn from snapshots and try it, but that might be time consuming. Is there a way of forming a question to snapshots which would tell me which to install? Alternatively is there an easy way to list

Re: [Woody] Mounting LVM-snapshots with ext3 + ACL + user_xattr-Patch

Paul Morgan <[EMAIL PROTECTED]> wrote: > This is a well known issue. lvm snapshots don't work in the 2.4 > kernel series. The reason is that ext3 needs to lock and flush the > ext3 journal *before* taking the snapshot. Does that imply, that lvm snapshots should work with 2.6

RE: [Woody] Mounting LVM-snapshots with ext3 + ACL + user_xattr-P atch

Hi Toens, > -Original Message- > From: Toens Bueker [mailto:[EMAIL PROTECTED] > Sent: Monday, January 05, 2004 6:58 PM > To: [EMAIL PROTECTED] > Subject: Re: [Woody] Mounting LVM-snapshots with ext3 + ACL + > user_xattr-Patch > > For XFS the LVM-Howto sugges

Re: [Woody] Mounting LVM-snapshots with ext3 + ACL + user_xattr-Patch

58, 9 Jan 5 15:20 /dev/RAID5/TEMP1500 > > However, mounting this snapshot fails: > > fsb01:~# mount -o ro /dev/RAID5/TEMP1500 /mnt/berlin/Snapshots/TEMP > mount: wrong fs type, bad option, bad superblock on /dev/RAID5/TEMP1500, >or too many mounted file systems >

Re: [Woody] Mounting LVM-snapshots with ext3 + ACL + user_xattr-Patch

Oliver Schade <[EMAIL PROTECTED]> wrote: > However, mounting this snapshot fails: > > fsb01:~# mount -o ro /dev/RAID5/TEMP1500 /mnt/berlin/Snapshots/TEMP > mount: wrong fs type, bad option, bad superblock on /dev/RAID5/TEMP1500, >or too many mounted file systems

[Woody] Mounting LVM-snapshots with ext3 + ACL + user_xattr-Patch

eated The special device has been successfully created: fsb01:~# ls -la /dev/RAID5/TEMP1500 brw-rw1 root disk 58, 9 Jan 5 15:20 /dev/RAID5/TEMP1500 However, mounting this snapshot fails: fsb01:~# mount -o ro /dev/RAID5/TEMP1500 /mnt/berlin/Snapshots/TEMP mount: wrong fs type,

Re: snapshots

-BEGIN PGP SIGNED MESSAGE- Hash: SHA1 On Thu, Jul 17, 2003 at 12:15:55AM +0100, Antony Gelberg wrote: > Any deb packages out there that will enable me to take a screenshot? I > don't have kde, and don't fancy installing kdelibs just to use > ksnapshot. And xv doesn't appear to be package

Re: snapshots

-BEGIN PGP SIGNED MESSAGE- Hash: SHA1 Shawn Lamson wrote: | On Wed, July 16 at 11:27 PM EDT | Tim <[EMAIL PROTECTED]> wrote: | | |>>Any deb packages out there that will enable me to take a screenshot? |> |>I> don't have kde, and don't fancy installing kdelibs just to use |> |>>ksnapshot. A

Re: snapshots

> > >> Any deb packages out there that will enable me to take a screenshot? > >I> don't have kde, and don't fancy installing kdelibs just to use > >> ksnapshot. And xv doesn't appear to be packaged, which I assume is a > >> licencing issue. > >> > >> Antony > >> > >> > > > >GIMP-->File-->Acqu

Re: snapshots

On Wed, July 16 at 11:27 PM EDT Tim <[EMAIL PROTECTED]> wrote: >> Any deb packages out there that will enable me to take a screenshot? >I> don't have kde, and don't fancy installing kdelibs just to use >> ksnapshot. And xv doesn't appear to be packaged, which I assume is a >> licencing issue. >>

Re: snapshots

> > Any deb packages out there that will enable me to take a screenshot? I > don't have kde, and don't fancy installing kdelibs just to use > ksnapshot. And xv doesn't appear to be packaged, which I assume is a > licencing issue. If you have the gimp installed, just click File/Acquire/Screen S

Re: snapshots

On Wed, Jul 16, 2003 at 11:27:20PM +0100, Tim wrote: > Antony Gelberg wrote: > >Hi all, > > > >My migration is complete! I'm now using Debian for everything possible, > >and my Windows development has been relegated to a bare-bones standalone > >box! :D > > > >Any deb packages out there that will

Re: snapshots

Antony Gelberg said on Thu, Jul 17, 2003 at 12:15:55AM +0100: > Hi all, > > My migration is complete! I'm now using Debian for everything possible, > and my Windows development has been relegated to a bare-bones standalone > box! :D > > Any deb packages out there that will enable me to take a s

Re: snapshots

Antony Gelberg wrote: Hi all, My migration is complete! I'm now using Debian for everything possible, and my Windows development has been relegated to a bare-bones standalone box! :D Any deb packages out there that will enable me to take a screenshot? I don't have kde, and don't fancy installin

snapshots

Hi all, My migration is complete! I'm now using Debian for everything possible, and my Windows development has been relegated to a bare-bones standalone box! :D Any deb packages out there that will enable me to take a screenshot? I don't have kde, and don't fancy installing kdelibs just to use