A snapshot is a copy of data taken at a specific point in time.

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SQL Server 2008 R2 - Cannot create database snapshot

Server: Windows Server 2008 R2 X64 Enterprise SQL: SQL Server 2008 R2 Enterprise X64 I have a default SQL Server instance, the SQL Server service account is running as a domain user. I am trying ...
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Determine what has changed a specific key on Windows registry

History : My C drive disappeared from "Computer" on my Win7. After fixing it a couple of days ago by changing a registry key, I notice today that my C drive has disappeared AGAIN. ...
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How to create a snapshot volume to a remote server using kvm?

I want to backup a few virtual machines to a backup server. Here're the backup steps. suspend a virtual machine create a snapshot of the virtual machine using lvcreate -s resume a virtual machine dd ...
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Why VM snapshots are affecting performance?

I read in one of the VMware KB article says that snapshots will directly proportional to VM performance. But my team keep asking me how snapshots can affect performance. I would like to give them ...
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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 ...
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273 views

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 ...
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Hyper V 2012 and snapshots

I have a Windows Server 2012 with HyperV role installed. I have 3 virtual servers and 2 Disks about 900 GB. One of these servers has 3 snapshots. The problem is this at we shut the virtual server ...
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How to delete all but last [n] ZFS snapshots?

I'm currently snapshotting my ZFS-based NAS nightly and weekly, a process that has saved my ass a few times. However, while the creation of the snapshot is automatic (from cron), the deletion of old ...
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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 ...
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52 views

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 ...
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857 views

Hyper-V snapshots exist after Shut Down

I'm running a virtual machine (hyper-v) on an Windows Server 2008 R2 64-bit machine. I want to increase the hard drive size but the edit button is not enabled. The notice says "...snapshots exists ...
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What would cause huge amounts of snapshot lag with NetApp Snapvault?

Our NetApp filer shows huge amounts of lag for snapvault operations. What could be possible causes of such large snapshot lag? Snapvault is ON. Source Destination ...
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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 ...
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“Failed to Snapshot” error when converting a physical server to a VHD in XenConvert version 2.5

Problem While using XenConvert 2.5.0.2918 to convert a physical Windows 2008 R2 server to a Virtual Hard Disk (VHD), I receive the error "Failed to Snapshot" in the logs and the conversion does not ...
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1answer
119 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 ...
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51 views

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 ...
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32 views

bad inodes in KVM guests

I ran a script to snapshot all logical volumes from KVM guests and backup. But /var/log/messages reported these errors: Jun 02 09:57:08 server lvm[24245]: Monitoring snapshot ...
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Recovering a Hyper-V vhd from a snapshot

I'm going to leave out tons of related info that I hope isn't relevant to keep this lean - feel free to ask for detail. My host is a Windows Server 2008 Standard SP2 (not R2). Last February we had ...
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2answers
673 views

Export snapshot from VMWare Workstation 8

How can I export a virtual machine from VMWare Workstation 8 to another physical computer which has VMWare Workstation 8? i.e. how can I move snapshots between different instances of VMWare ...
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1answer
30 views

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 ...
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1answer
49 views

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 ...
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57 views

xenserver backup producing snapshot too long

I am having the same problem as outlined in this question: xenserver snapshot chain too long I don't have enough rep to comment on the post so I am creating my own question. I have attempted to use ...
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1answer
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VSS fails on creating snapshot - various VSS writers failed state, timed out

I have several errors in my log. My environment is: Server 2008 R2 (virtual machines on Server Core stack). AppAssure Replay 4 as the backup solution. In the evening backup goes okay usually, ...
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Best compression for ZFS send/recv

I'm sending incremental ZFS snapshots over a point-to-point T1 line and we're to a point where a day's worth of snapshots can barely make it over the wire before the next backup starts. Our send/recv ...
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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: ...
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Debian 7 auto mounting .zfs snapshot directory

Today I come with another weird thing on Debian 7 that I cannot explain myself.. Context : Os: Debian7 Kernel: Linux http-apache-01a 3.2.0-4-amd64 #1 SMP Debian 3.2.54-2 x86_64 GNU/Linux This system ...
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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 ...
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Automate Amazon EBS Snapshot creation?

Once in a while I would go to http://aws.amazon.com/console and manually right click my EBS volume and create a snapshot. This is kind of tedious and I would forget sometimes. Is it possible to ...
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235 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 ...
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122 views

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, ...
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133 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 ...
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vmware esxi 5, cant create snapshots and consolidate fails, how to delete old or consolidate redo logs?

I have a VM that seems to be working ok, but when VMWare DR (or I) tries to create a snap shot, it fails, and when I view the summary page of the VM it has a warning at the top showing that the disks ...
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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 ...
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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 ...
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reclaim space from xen server

i found xencenter stotage => general tah display 1096.6 GB used of 1107.7 GB total (708.5 GB allocated) seen some space have been eaten and not release. the SMLog show that [13816] 2014-03-28 ...
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119 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 ...
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73 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 ...
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164 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 ...
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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 ...
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4answers
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where are kvm-snapshots stored?

I run several VM's on KVM/ubuntu, which all get started with the -snapshot parameter (the VM's only compute several things which can be destroyed after reboot). Out of the docs I've read, the changes ...
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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 ...
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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 ...
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Linux LVM snapshot commit or revert?

I'm about to perform an experimental upgrade on my CentOS 5 server. If the upgrade fails, I want to be able to back out the changes to the filesystem. This scenario seems similar to the example in ...
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Is it possible to convert a LVM2 snapshot to a linear LV?

We have DRBD volumes that are presented to guests, and we often snapshot them with the intention of reverting back to the snapshots. I understand in LVM, snapshoting then working with the snapshot is ...
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37 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, ...
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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 = ...
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657 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: ...
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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.
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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.
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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 ...