Questions tagged [snapshot]
A snapshot is a copy of data taken at a specific point in time.
465
questions
8
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2
answers
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How to delete a btrfs snapshot?
I'm new to btrfs and I am trying to delete some snapshots I made a few months ago. They're taking up about 20GB of space, and I need that space back.
This seems to list the snapshots:
↪ sudo btrfs ...
- 1,090
12
votes
3
answers
10k
views
Proper way of handling LXC containers on btrfs
Lets say we have one server with lxc installed, and a lxc container used for as a base img /var/lib/lxc/ubuntu_base. For simplicity let's forget the config changes after copying the base img.
some ...
- 394
0
votes
1
answer
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Creating a scalable back-up cluster with one interface and retention
Currently I'm running a number of back-up servers to back-up other servers with, e.g. b01, b02, .., bn, all with their own IP's, running their own FTP / SSH services. However, I would like to create ...
- 3
4
votes
1
answer
620
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Remove a file from a btrfs snapshot and still use btrfs send/receive?
I'm planing to use btrfs send/receive to synchronize two filesystems and keep a few older snapshots (like a time machine) on the backup.
Now what happens if a user ask me to remove a file or ...
- 288
0
votes
1
answer
4k
views
Regenerate Snapshots from .avhdx files
I'm getting used to Hyper-V and I come into this situation:
I manually did a backup and a restore of a virtual machine with 1 disk and 2 snapshots. My restored machine has a .vhdx file and 2 .avhdx ...
- 111
0
votes
1
answer
122
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handle multiple calls of rsync, dd and snapshot
The server runs the following operations often. It takes a snapshot of a logical volume, then backup up the content to the remote backup server. It is possible that multiple backups and transfer ...
- 239
1
vote
2
answers
426
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Problems with pid files when restoring OpenVZ snapshot
I am trying different ways to take snapshots of running openvz containers.
Following this guide : http://openvz.org/Checkpointing_and_live_migration, I always encounter an issue with pid files ...
- 182
1
vote
1
answer
836
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Restoring a VM from a backed up snapshot in Windows Server 2008R2
I have a Windows Server 2008 R2 cluster with a number of guest VMs that are undergoing weekly maintenance for backups, performed in a save -> export -> start process. This process was taking up ...
- 814
2
votes
2
answers
5k
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xenserver snapshot chain too long
I've been running a XenServer 6.2 server for a month or so and recently one of my VMs will not perform snapshots.
I receive the error "The snapshot chain is too long" although I have removed all of ...
- 773
1
vote
2
answers
752
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ZFS snapshots and atomic updates
So I'm tinkering around with ZFS on linux and zrep. I've got 2 VMs on my laptop and I'm running zrep and synchronizing the contents of one filesystem to another.
One unexpected situation is this: ...
- 12k
11
votes
3
answers
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Can NetApp Snapshots be used as Backups?
Our shop relies very heavily on NetApp Volume Snapshots for backups. We use traditional agent-based tape backups for some of our data but by and large we rely on the Snapshots for the majority of our ...
user62491
3
votes
1
answer
6k
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ESXi alerts to consolidate but there were no snapshots taken
I recently came a cross a disk failure on our server and got the disk replaced. Due to this disk failure there were certain issues which raised and now its going up and down. What my problem is that, ...
- 259
2
votes
0
answers
842
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How to Reclaim Space from XenServer?
I found that the XenCenter storage tab claims there is 1096.6 GB used of 1107.7 GB total (708.5 GB allocated). It appears that some space has been eaten and not released.
The SMLog shows:
[13816] ...
- 21
0
votes
2
answers
55
views
Windows Server 2003 activity monitoring and reporting
I have BackupExec 2012 attempting to backup a Windows Server 2003 VMWare instance.
I often get unable to quiesce error: "The virtual machine may be too busy to quiesce to take the snapshot."
I've ...
- 359
1
vote
1
answer
4k
views
How to exclude VHDX disk from snapshots on Hyper-v
(I'm using the built-in Hyper-V that comes with Windows Server 2012 R2)
I want to play with my snapshots while I have a separate disk that would not be affected by those snapshots, thus I can store ...
- 133
2
votes
1
answer
2k
views
Hyper-V How to define "auto revert" to a snapshot after each reboot
I'm using the built-in Hyper-V that comes with Windows Server 2012 R2
and I'm looking for the option that lets me to set "auto revert" (or "auto apply")
to a specific snapshot after the machine is ...
- 133
1
vote
1
answer
3k
views
How do I determine the actual size of a NetApp filer snapshot?
We have a volume serving up CIFS data, which seems to have a lot more snapshot data than the rest. I suspect that this is due to a higher rate of change, and that I could determine this using the snap ...
- 2,005
4
votes
2
answers
2k
views
LVM snapshot of btrfs volume changes mounted device
I have a btrf volume on top of LVM.
Now I want to do a snapshot on the lvm level (NOT on the btrfs level).
But every time I create the LVM snapshot, btrfs changes the mounted block device to the ...
- 263
3
votes
1
answer
2k
views
bad page map bug during snapshot
I ran the following command to create a snapshot volume. But the kernel received a bug and the kvm hypervisor stopped responding. Why is the error and how to fix it?
lvcreate -L20G -s -n ...
- 239
21
votes
8
answers
5k
views
Do snapshots + RAID count as a good on-site backup solution?
The two main reasons I can think of for taking backups seems to be taken care of when I use both snapshots and RAID together with btrfs. (By RAID here, I mean RAID1 or 10)
Accidental deletion of data:...
- 347
2
votes
4
answers
2k
views
Scale-out distributed storage with snapshots
I'm aware there are many similar questions around, several with great answers. I still haven't quite found what I'm looking for though: a distributed, scale-out FS that supports snapshots. Gluster ...
user206444
2
votes
0
answers
62
views
Change the logical volume
I am quite new this snapshot process.
Let, I have three logical volumes as A, B, C.
I worked on logical volume C. But accidentally when I restart the system, it goes to the snapshot A. How can I ...
- 121
2
votes
1
answer
2k
views
Detailed explanation of how virtual machine snapshots work
I would like to fully understand how virtual machine snapshots work. Although I have researched this subject I cannot seem to find a "high-level" overview of how snapshots work practically. My ...
- 843
1
vote
1
answer
90
views
Snapshots - where are they running from?
I have an odd 'issue'.
And I feel a little dumb asking.
Just after Christmas, 2013, I added a cronjob on one of my EC2 instances to snapshot all of my EBS volumes that had a tag where backup=true, ...
- 183
3
votes
1
answer
6k
views
How to replace QEMU binary with newer version for libvirt live snapshots
This is my first post, so please be gentle. :)
My CentOS 6.5 box has a QEMU binary that does not support live external snapshots. This is the command I attempt on the virsh CLI, and its output:
...
- 1,612
-2
votes
1
answer
405
views
Create centOS6 snapshots
How can I create snapshots of system (similar to what VM have) of a centOS 6 to a network location?
That is I need to know what software/package should I use and maybe some ways to work with it.
- 699
4
votes
2
answers
3k
views
See progress of lvm --merge
Is there any way I can see the progress of a merge of my snapshot back to the origin?
The only thing I know is that there is an ongoing merge because I can't create a new snapshot.
0
votes
2
answers
992
views
Snapshot Reporting via Email
I've got the current script that is supposed to log onto vsphere, get all snapshots that are over a week old, and email the results.
Connect-ViServer server
$weekOldSnapshots = (Get-Date).AddDays(-7)...
- 330
1
vote
1
answer
467
views
What will be deleted when I delete snapshot?
Using ESXi 5.0, I had a disk which was converted from VHD to VMDK using Winimage which left me with a sparse VMDK.
I tried to snapshot the VM after importing it which caused a problem. I believe I ...
user160910
1
vote
2
answers
2k
views
Can I re-attach my EBS while a snapshot is pending?
I have my database backed up to an EBS drive. My current backup method is
1) queue all writes (not important how)
2) kill database process
3) detach + umount ebs volume
4) take snapshot
5) ...
- 125
2
votes
2
answers
216
views
ESXI Snapshots on a CentOS VM
On reverting back to a snapshot on one of my CentOS VM's the date is obviously set back to the original snapshot date. I was wondering if anyone knew of any other changes to the server (apart from ...
- 21
2
votes
2
answers
9k
views
Delete all snapshots over 30 days old
I'm currently using VMware 5.1 and looking for a method to keep snapshots that users create from becoming too old. Is there any tool inside of VMware that allows you to manage snapshots (or possibly a ...
- 330
2
votes
1
answer
2k
views
LVM2: How to copy snapshots?
I read What does an LVM2 Snapshot contain? and LVM Snapshot confusion.
What I'm trying to figure out is if there is a way to create a copy of an LVM snapshot for use with different Xen VMs. I know ...
- 21
1
vote
1
answer
268
views
Security of AWS automated backup via snapshots
I need to automate backup of a Linux AWS instance. I would like to do this via one of the many scripts available that rely on the API access of AWS to do snapshots of the underlying EBS volume.
What ...
- 418
0
votes
0
answers
561
views
Hyper-v takes a long time to create snapshots
I'm not sure when, but I've noticed as of recently, whenever I go to make a snapshot of certain machines, it hangs at 2% for a good while and then eventually finishes (fairly quickly, actually). I don'...
- 195
0
votes
1
answer
367
views
EC2 backup strategy, 2 EBS volumes
i've currently set up a Windows EC2 instance with MySQL installed on the root/C: drive, with the database files, logs, etc on another volume.
Is it safe to use snapshots to back up the instance? My ...
- 1
0
votes
1
answer
2k
views
An LVM snapshot of an ext4 fs does not seem very clean
I create an LVM snapshot of a mounted ext4 fs:
lvcreate -L 10GiB -s -n "root-snapshot" "/dev/myvgname/root"
If I then run e2fsck on /dev/myvgname/root-snapshot, it says:
e2fsck 1.42.5 (29-Jul-2012)
...
- 193
1
vote
1
answer
2k
views
Qcow2 backing image and overlay idea
I have 2 KVM servers running Windows Guests. I want to create a Qcow2 image with Windows 7 on it, install the base software needed, and then make that a backing image, read-only, with one qcow2 ...
user160910
0
votes
1
answer
449
views
Mounting an LVM snapshot and converting file: is it safe?
I have KVM running and need to convert some qcow2 disk images from running guests into vmdk format. Is it safe to take an LVM snapshot of the logical volume that the qcow2 file resides on, mount it, ...
user160910
0
votes
1
answer
722
views
Clone/Backup Strategy for VMs between ESXi and KVM requiring clones to run concurrently with original VMs
I am stuck on this problem and need help. ESXi Free version 5 and qemu-kvm/libvirtd version 0.10. I will put the TL;DR first since it captures the problem fairly well.
TL;DR
I have 2 VMs on a KVM ...
user160910
0
votes
1
answer
2k
views
Qcow2 converted to vmdk show as spare and can't be snapshot
As the title says, kvm disks that I converted and moved to ESXi are useless because I cannot use snapshots due to the fact that they are sparse disks. Does anyone have a resolution for this issue? ...
user160910
4
votes
1
answer
12k
views
Is it safe to delete this snapshot?
Building on a previous question I had asked re: a VM freezing at the end of the backup, one of the solutions Veeam has offered is to make sure that there are no other snapshots that exist of that vm. ...
- 4,028
12
votes
2
answers
12k
views
Why does OpenStack distinguish images from snapshots?
Usually, https://serverfault.com/a/268727/126950:
snapshot = an exact capture of what a volume looked like at a particular moment in time, including all it's data.
image = a total snapshot of a ...
- 1,194
0
votes
2
answers
490
views
ESX Free: Creating clones of VMs to run concurrently as a branch version
I have ESX free (most recent version 5.X) installed on a standalone server with an internal datastore in a RAID 5 setup. The VMs will be Windows mostly with some Linux and will be dedicated to ...
user160910
6
votes
2
answers
935
views
VMWare/ESX Snapshots vs Libvirt snapshots vs LVM2 snapshots
In VMWare, when a snapshot is taken, my understanding is that it creates delta disks, and any writes that occur after the snapshot is created will be written to these new delta disk images, and not ...
user160910
0
votes
0
answers
559
views
ESX: allowing users to snapshot VMs without vSphere Client Access
I am using ESX (latest free version 5.X) to host multiple VMs (mainly Windows with some Linux). Users will have control of these VMs and should be able to snapshot them, however I don't want to deal ...
user160910
-5
votes
1
answer
466
views
best way to create lvm snapshot of / partition [closed]
I need to know the best way to implement the snapshot of root partition "/" on a kvm guest.
What I have is as follows
1-
/dev/vda ..... 10G free
-- /dev/vda1 boot partition (ext - 83)
-- /...
- 1
0
votes
1
answer
236
views
Can i have 400 snapshots in Amazon Ec2 if they are incremental only
I want to know about snapshotting.
Amazon says that they make
Incremental backups
Only charge for the data chnaged between snapshots
Now my question is let us suppose the only data which change is ...
- 213
3
votes
2
answers
1k
views
Server Backup Strategy for Amazon EC2
Where and how should I backup my EC2 / EBS based snapshots OUTSIDE of EC2?
EC2 provides a great product with their EBS based snapshots. However it is also a high risk point that someone could ...
- 1,585
-1
votes
1
answer
55
views
Switching Applications server on different VM snapshot
I have a VMware VM running with a specific Application Server.
Instead of creating a new VM for install a new application server, Is it a good practice creating a snapshot of old Application Server ...
- 113
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