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

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creating snapshot for mongodb

I am trying to create snapshot for mongodb on centos 6.6. root@ ~]# lvscan File descriptor 12 (pipe:[23409]) leaked on lvscan invocation. Parent PID 3579: /bin/bash File descriptor 13 ...
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Does btrfs share file parts across snapshots?

I know that modern filesystem snapshots take very little space until they start to diverge by changes in files. However, I have been unable to identify at which granularity btrfs manages the changes. ...
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18 views

RDS snapshot to mysqldump

We have accidentally deleted some of the data entries from the RDS db and came to know after 10 days, so to recover data from rds snapshots,we figured out these possible solutions Restore the db ...
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1answer
23 views

Revert libvirt external snapshot

Having some issues understanding how to revert snapshots on ubuntu 14.04 using KVM... Until now i have been using internal snapshots, however due to space issues (space not being re-allocated after ...
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1answer
15 views

libvirt external snapshots: snapshot chain linked through filenames or inodes

If I have the following chain (it was created using external snapshots through virsh): base.qcow2 --> snap1 --> snap2[current] Now if I copy "base.qcow2" to a remote location, del the original ...
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283 views

Shutting down machine while deleting large snapshot

On ESXi 5.1, i started deleting a snapshot some hours ago.. A big snapshot of about 800gb. the machine is an SQL Server. It is only at 34% on deleting. can i just shutdown the machine while ...
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73 views

Repairing OpsCenter rollups60 Results in Snapshot Errors

I am running a 6 node cluster using Apache Cassandra 2.1.2 with DataStax OpsCenter 5.0.2 from the AWS EC2 AMI "DataStax Auto-Clustering AMI 2.5.1-hvm" (DataStax Community AMI). When I try to run a ...
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2answers
163 views

Will a Veeam 8 Snapshot Backup be be unable to restore my non-quiescable file-based databases if someone is logged in to them at the time?

We have some very old file-based databases (multi-user, but not Server-based) that are running on some VMs on an VMWare ESXi. Setup HyperVisor The ESXi is running ESXi version 5.1.0 Virtual ...
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18 views

How can i rename a vm in libvirt with snapshot? [duplicate]

I tried to rename a VM in libvirt, but the VM with the new name does not bring the snapshot on the old name. Is there a command to proper rename the VM, that handles this, or i need to import the ...
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106 views

Mysql table doesnt exist error after trying run from lvm snapshot

I'm trying to set up mysql replication by making lvm snapshot of master datadir and copying it to slave. The procedure is quite simple, on master server I execute "FLUSH TABLES WITH READ LOCK" and on ...
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2answers
145 views

How are Dell Equallogic Snapshots different from a Clone as it relates to disk space consumption?

I have a volume that is 125GB in space. Each snapshot I have is 125GB, exactly. I thought snapshots only grabbed data that changed, using its pointers. If not what the difference between a snapshot ...
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44 views

lvm archive and backup files not purging

I do hourly backups doing snapshots, and every time I do it creates files in /etc/lvm/archive. But lvm doesn't appear to pay any attention to the "retain_days" parameter under "backup" in ...
14
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2answers
979 views

Is running permanently in a VMWare snapshot bad for performance?

I understand that the VMWare KB frowns upon long running snapshots mainly due to two things (In my opinion) Taking tons of snapshots can fill up the data store. Snapshots are simply delta files. ...
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67 views

LVM2 Thin pool transaction_id mismatch

I believe we trashed some LVM thinpool metadata while moving 2 volume groups to a different machine. We now trying to reactivate the volume groups on the original machine. The physical volumes, volume ...
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1answer
80 views

Git a Windows file system as an alternative to virtual machine snapshots

I am a software developer and I want to test several versions of my software, with different configuration files and different contents in the database (everything running on Windows). For example, I ...
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3answers
161 views

Long running VMWare snapshots are bad… but what about VMDKs on a ZFS\LVM snapshot?

The VMWare KB and multiple blogs state that long running snapshots are bad for both performance reasons and integrity. They have valid points. Granted this is not with ESXi but rather ...
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84 views

AWS RDS CLI: AccessDenied on CreateDBSnapshot

I want to use the AWS RDS command line tool to create a snapshot of my database my-database using create-db-snapshot. I have created a special backup role in IAM with a policy that allows me to ...
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1answer
80 views

How do I enable backup(snapshot) on redis elasticache t2.medium

I was able to create a snapshots of my m1.small caches but the backup button is disabled when I select my t2.medium. Is there a way for me to enable backup of a t2.medium redis elasticache?
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59 views

Snapshot of BTRFS Device on top of luks Volume

I have the following problem: I can't figure out, how to create a snapshot of a btrfs volume residing on a crypted disk. This is the setup: /dev/sdb is a 1TB USB 3 disk. it has a partition ...
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1answer
113 views

VMWare: Are long running snapshots really THAT bad?

This is ESXi 5.5. I know that the VMWare KB is very against long running snapshots, however I do not know of another way to do this. Let's say I have a base Linux system and want to spin up a unique ...
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1answer
59 views

Best practice for VMWare Snapshots for lab VMs

I am setting up test\dev machines in VMWare. We have about six users that I would like to give a VM to. They are all going to be based off a single base image (Ubuntu). I could always create six ...
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1answer
65 views

Can't delete a btrfs snapshot

I have a system that creates periodic btrfs snapshots and deletes old ones. Today, I've started receiving warnings that the system can't delete some old snapshots. This is the output I get: ...
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1answer
28 views

Removing snapshot after removing guest hard disc

I have a server with ESXi 5.5 installed. I recently wanted to add a new hard disk to one of the guests. After adding the virtual disk to it, I took a snapshot just to be sure that nothing would go ...
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176 views

How to incrementally backup XenServer VMs

I am looking for a way to backup XenServer (or XAPI) VMs incrementally. backup just changed data every time. without performance penalty, slowing down the server after the backup is done (snapshots ...
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76 views

Windows 2012R2 as RDSH and rollback to clean state

I am in the process of installing a new Windows 2012R2 server in Remote Desktop Session Host mode that will work as a "terminal server" inside a classroom. The idea then is that after the server is ...
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176 views

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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Determine what has changed a specific key on Windows registry [closed]

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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2answers
1k views

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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1k 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 ...
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1answer
81 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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47 views

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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239 views

“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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2k 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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76 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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56 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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115 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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1answer
72 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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116 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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2answers
1k 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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1answer
103 views

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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235 views

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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4k views

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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1answer
548 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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202 views

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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34 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 ...
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361 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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1answer
270 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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979 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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357 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 ...
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315 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 ...