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

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2
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2answers
505 views

SAN based Snapshots and Disaster Recovery

I wanted to know if anyone has has any expirience of using SAN based snapshots and replication between SANs for disaster recovery. My main worries are around databases and applications like Exchange ...
2
votes
3answers
5k views

libvirt and qemu/kvm -snapshot option

Using libvirt, I want to use QEMU's '-snapshot' option. That way, when the machine shuts down, all of the disk changes that were made get destroyed. Here is the manual for the -snapshot option: ...
0
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2answers
483 views

VMware Server 2 Snapshots Crashing Ubuntu Guests

I have about 20+ Ubuntu Guests running on Vmware Server 2.0.2 and every night a backup script takes a snapshot of all running VMs, backs them up, then removes the snapshots. Every morning I check the ...
0
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1answer
123 views

Problems with USB-Devices using VDR

I'm using VDR on vSphere4. It works sucessfully. I've already backuped several VMs with VDR and I like it very much. But now we got a problem. We have 2 VMs, using an USB-Device Server with a stick ...
3
votes
6answers
8k views

How do I best archive VMWare VMs for reuse?

I'm using VMWare ESX 3.5. I've just created a couple of different-flavour VMs (a Windows 2008 one and a Windows 2003 one), installed windows updates, and am generally happy with their pristine ...
0
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1answer
211 views

is CBT used for snapshots?

1) Just wondering, is Change Block Tracking utilised for snapshots (ESX 4.x)? or is the mechanism the same as ESX 3.x 2) I know its used for SVM after reading a punching clouds article ...
2
votes
2answers
2k views

VirtualBox Snapshot - How to stop them to grow and take more and more space?

I am using VirtualBox on Ubuntu with some programs installed in it. And the snapshot file does not stop to grow. I don't need this feature. I just want my data to be saved on the virtual windows hard ...
0
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2answers
905 views

Restoring snapshot for Microsoft Exchange server

The background: I need to do some testing with Microsoft exchange server. Specifically, I'll be installing some software on the Microsoft exchange server machine and uninstalling that same software ...
15
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2answers
5k views

Safe to Use an Amazon EBS Volume While Snapshot in Progress?

Is it safe to use an EBS volumne while a snapshot is being created? I've currently got a 100Gb EBS volume mounted. I am in the process of snapshotting it. Goodness it's slow!! It's going to end up ...
6
votes
2answers
1k views

Large number of snapshots on a ZFS system

Here's my scenario: I have two servers (well many more, but two for this scenario), one is a Solaris backup server, the second is a CentOS Linux Server. Every night the CentOS server runs a cron job ...
11
votes
11answers
6k views

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 ...
2
votes
2answers
1k views

Schedule Recreate Snapshot and Reinitialize Subscriptions - SQL 2005

Monthly I have to generate a new snapshot for replication and reinitialize subscriptions in SQL 2005. I would really like to automate and schedule this, but I'm not having much luck discovering how. ...
0
votes
4answers
6k views

How do snapshot backups work?

How are snapshot backups different from traditional backups? I know that snapshot backups take a minimum of time, but I don't understand how they can do this. Can anyone explain this to me?
2
votes
2answers
828 views

Live Xen snapshotting?

If I use xm save domain dumpfile, this pretty much accomplishes what I want to do. However, this does cause some downtime, and I really don't want to close network connections or take the machine out ...
1
vote
1answer
1k views

Virtual Machine Snapshot revert issue

After reverting to an older snapshot, Windows Server 2008 VM running on VMWare gives me the following error when I tried to login: The trust relationship between this workstation and primary ...
2
votes
2answers
204 views

SQL server 2005 Checkdb - no room for snapshot files

I have a 2Tb+ SAP database with 8 datafiles, the first files have grown to fill the available disk space on our HP EVA5000, and the growth is now on the new files. We upgraded SQL from SQL server 2000 ...
7
votes
3answers
2k views

Backing up VirtualBox VMs

Does anyone have a good complete strategy for backing up a bunch of virtual machines running under VirtualBox? I intend to run a handful of virtual machines on a single hardware platform and back ...
2
votes
1answer
866 views

Unremovable invisible snapshot

We are running ESX 3.5.0 and are using VCB for making backups. Yesterday VCB failed to remove its snapshot. That has happened a couple of times before, and I removed it manually as usual. But this ...
0
votes
1answer
4k views

NetBackup with VSS and Instant Recovery - Failing to delete old snapshots

We are attempting to implement Microsoft VSS for snap-shotting in our NetBackup 6.5.3.1 environment. The clients are both 32 & 64 bit Windows 2003 Server. Snapshot parameters are: Instant ...
1
vote
1answer
747 views

Create a SQL Server full backup without affecting maintenance plan?

We use a centralized SQL Server 2005 server for web development. The server has a maintenance plan to take a full backup each Sunday and incremental backups on all other nights. All databases use ...
3
votes
3answers
1k views

OpenBSD and filesystem snapshots

What is the best solution, if any, for carrying out LVM style filesystem snapshots on OpenBSD?
12
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4answers
22k views

Is this how LVM snapshots work?

I'm trying to figure out how LVM snapshots work so I can implement it on my fileserver but I'm having difficulty finding anything on google that explains how it works instead of how to use it for a ...
1
vote
3answers
2k views

convert vmware snapshot to vdi

I found plenty of documentation on how to convert a .vmdk file to a .vdi (VirtualBox) file. But they all assume you don't use snapshots. -- Is there a way to convert the vmdk snapshots too?
1
vote
3answers
1k views

LVM and snapshots

I have a fileserver that I just setup lvm on. I have two LVM partitions /dev/fileserverLVM/home /dev/fileserverLVM/backup I'd like to take and store the snapshots in /dev/fileserverLVM/backup. The ...
0
votes
1answer
665 views

Speeding Up MSSQL Snapshot Replication to SQLExpress Replica

I have a well-connected remote site that I'm delivering snapshots to twice-daily of certain tables. Snapshot replication is the only method that I can use based on the schema limitations of the ...
8
votes
2answers
9k views

What happens to children when deleting a snapshot in vmware?

I'm new to virtualization and want to make sure I understand what will happen when I delete a snapshot Say I have a tree like this Base SnapshotA SnapshotB SnapshotC Two questions: If I ...
0
votes
1answer
153 views

Backups, JFS2 Snapshots and powerloss

I have recently been tasked with improving the backup strategy of a legacy server supporting 150 users via a terminal based interface. The issue is currently that the server has a single backup taken ...
1
vote
3answers
5k views

VMware Workstation Error: Cannot find a valid peer process

I am running VMware Workstation 6.1.5 (build-126130) on CentOS 5.3 (Final). One of the guest machines is reporting an error when I try to power on the most recent snapshot. Snapshots further back in ...
0
votes
5answers
4k views

What might cause a VMWare snapshot to timeout?

I'm using BackupExec and VCB to backup a few VMs. As I understand it, the pre-job script creates a snapshot of my VMs, mounts them as virtual directories on my backup server, and then my backup exec ...
4
votes
2answers
4k views

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 ...
11
votes
3answers
13k views

Snapshot/rollback for libvirt+KVM?

I've recently begun using KVM for my development/test environment on a Linux host system with 8G memory. Prior, I was using VMware Fusion for my virtual environment, but my Macbook only has 2G memory. ...
0
votes
4answers
814 views

Can I count on VM Snapshot on production machines for system recovery?

I have a Windows 2003 server running on VMware Virtual Machine. One of our developers wanted to install a service on it. So I decided to give VM snapshot a try on the machine in case if the developer ...
1
vote
2answers
2k views

Changing settings in VMWare snapshots

We're a dev shop so we make heavy use of VMs and snapshots for testing. This works great most of the time, but occasionally I discover some setting in a VM that needs to be changed across all my ...
11
votes
3answers
15k views

How to make/compare filesystem/registry snapshots in Windows?

What's a simple way to get a list of all files installed/modified and keys added/removed by a Windows (XP, Vista or 7) program installer? I'd like to take a before and after snapshot, and see what ...
2
votes
1answer
1k views

Backing up SQL NetApp Snapshots using TSM

In our environment we have a 3 node SQL 2005 Cluster which is on NetApp storage. We are currently using SMSQL (NetApp SnapManager for SQL) to take Snapshot backups of the data. This works great, but ...