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

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405 views

LVM+MongoDB. Dropping in speed of backup creation

Till recent time we have been making mongo backups archiving LVM snapshot on hidden SECONDARY server with RAID10 on SAS disks. Currently operation on making snapshot from volume with 500 Gb of data ...
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64 views

Boot from VMware snapshot file after accidentally deleting related snapshots

I'll preface this with the obvious: I am dumb. I am currently working from home on some scheduled maintenance on a production server running on a vm -- a bitnami redmine/svn stack to be specific. I ...
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1answer
148 views

“Reinstall” FreeBSD using ZFS snapshots

I am using a dedicated server, and unlike on VPS providers or VM machines, getting back to a clean state (untouched, after install) is quite a laborious thing to do (lots of clicking around in a web ...
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1answer
140 views

Cannot remove snapshot Hyper-V Server 2008 R2

I am slowing going through and removing snapshots that for some inexplicable reason have been running since 2012!!!!!!! Most have been fine to delete and let the merge happen offline or at worst ...
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1answer
242 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 /etc/lvm/lvm....
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204 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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1answer
274 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 ...
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300 views

Replication with Veeam causes timeouts on large VM's

I have been trying to replicate two of my larger VM's one being Exchange 2003 and once the snapshot begins to commit the server begins to time out. I have updates my ESX hosts from 4.0.0 to 4.1 and ...
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22 views

hyper-v accidentally removed snapshot

I (very stupidly) moved a Hyper-V snapshot via Windows explorer and then, of course the VM server would not boot. I moved it back and then removed the snapshot via Hyper-V so there are no snapshots ...
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52 views

is it safe to create a snapshot of a volume of a running ec2 instance

I'm running a MongoDB Cluster on 3 Instances on AWS Each instance has 2 EBS attached to it - / [8GB] - /data [50GB] To backup a cluster MongoDB recommends to create a snapshot of the /data driver ...
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17 views

BTRFS remove directory from snapshot

There is the: btrfs subvolume delete <subvolume> command for deleting snapshots, but is there any solution if you need to delete a single directory from 60 snapshots? Not possible with rm -...
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14 views

Issues with 2008R2 Hyper-V Snapshot [Permission Issues]

We have an issue while taking snapshot of a VM machine hosted on Hyper-V host. The Hyper-V host is a Windows 2008R2 Sp1 Ent edition server and we have couple of VMs hosted on them. Whenever I try to ...
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34 views

Qemu qmp snaphot-drive

what is the correct method to use qemu qmp snapshot-drive ? Is there any other way to create snapshot of qcow2 based VPS without using virsh snapshot-create ? They seem to corrupt the filesystem on ...
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18 views

delete a snapshot created before LVM extension

I believe that snapshots and disk extensions are not friends, having said that... Is it safe to delete a VMWare snapshot created before adding a new virtual hdd to my LVM partition? What I mean is: ...
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1answer
175 views

Restore “snapshot” of OS partition on physical Linux server to spare partition then boot - caveats?

We're planning to bring a new physical server online in the near future and as part of the disaster recovery / change management plan, I want to be able to easily roll back the operating system and ...
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81 views

SQL Server VSS writer interfering with VMWare snapshots

After changing to TSM for the VMWare backups, we've started experiencing an odd issue with our Snapshot backups. We take system drive snapshots as a backup solution for the machine states. All the ...
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81 views

ZFS - zfs destroy snapshot during zfs send incremental

How does zfs handle destroying snapshots during an incremental send? Example: 2 servers using ZFS: zfshost1 [root@zfshost1~]# zfs list -t snapshot NAME zones/40e66d56-4ea8-11e5-885d-feff819cdc9f@...
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289 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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76 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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351 views

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] ...
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54 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 ...
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201 views

Windows WMI get a snapshot EnabledState

I am trying to get the EnabledState of a virtual machine snapshot using WMI. That is I try to get the EnabledState that was current for the virtual machine when the snapshot was taken. So far I know ...
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500 views

Downloaded -flat.vmdk from snapshoted machine is different everytime

I have a virtual machine running on VMware ESXi 4.1.0, machine has one Thick provisioned disk stored in VM forder (residing on local datastore). I am planning to move the virtual machine to another ...
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5k views

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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93 views

RHEL6.1 VM machines frozen when a quiesced snapshot is created for backup purpose

My RHEL 6.1 virtual machines running on ESXi hosts 5.1.0 get frozen when the backup procedure tries to get a quiesced snapshot. I have to reset the virtual machines from VMware console. The tool used ...
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57 views

Figure out the used space on the snapshot thin volume

I have the following lvm configuration. Hard Disk: /dev/sdb (Size 10 GB) VG: vg_root on /dev/sdb THIN_POOL thin_pool occupying the whole physical extent lvcreate -y --extents 100%free --thin vg_root/...
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77 views

MongoDB fsyncUnlock won't unlock occasionally on Windows

We have a MongoDB replica set installed on Windows servers, with a scheduled backup job. MongoDB is configured to use journaling. The job runs db.fsyncLock() via script on MongoDB (primary server), ...
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462 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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263 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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130 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 /dev/...
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501 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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630 views

Samba 3.5 Shadow Copy for Windows 7

Over the past several days I have been trying to get the shadow to work with samba but haven’t been successful. Can someone check below config and let me know if I am missing something? We are using ...
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127 views

TFS 2010 and SCVMM to manage snapshots

I have a VM with TFS 2010 and SCVMM 2008 installed on (I know you're told not to do that). I have SCVMM linked to the host and that's working good, and have configured the scvmm on the lab management ...
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3k views

Troubleshooting 'Could Not Start' scheduled task error:

I'm trying to run snapshot on my server to back up the drive onto a local NAS server. I'm currently using this on a Win2k, Win2k3, and Win2k8 servers. Both the Win2k and Win2k8 servers are correctly ...
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193 views

VMWare ESX4 snapshot failing with “file is larger than the maximum size supported”

I created my virtual machine hard drives with thin provisioning at the maximum of the block size (256gb for 1mb blocks) and then tried to snapshot them, failing with the error "file is larger than the ...
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57 views

Is it possible to clone a snapshot of a KVM vm?

I only find an option to clone the last state, but not the state of a snapshot. Is there a solution? I'm using virsh and virt-manager to manage the vm's. The Hypervisor is Ubuntu Server 16.04. The vm'...
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16 views

AWS Windows SQL EC2/EBS application consistent snapshot

Has anyone found a way to take a EBS snapshot for a Windows Server that maintains Application Consistency? In my case it's with SQL and I'd like to maintain SQL app consistency. Either via quiescing ...
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35 views

LVM difference between LV size and Cow-table size?

I created a snapshot: lvcreate -n Snapshot -L 512M -pr -s /dev/fedora_2016/home now with lvdisplay it says that LV size is 2GB and Cow-table size is 512MB. 1.What is the difference between LV size ...
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12 views

Creating a new libvirt VM based on existing snapshots

I have a libvirt/qemu-VM with multiple snapshots. (I can for example use virt-manager to see those snapshots.) Is there a way to clone this VM completely keeping all the snapshots? Is it otherwise ...
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59 views

Merge btrfs subvolumes of lxc container

Problem: I've made some snapshots of an lxc container in the past. When I tried to make one earlier using the command lxc-snapshot -n base -c commentfile it echo'd Container is not defined. I ran that ...
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25 views

XenServer 6.5 - VM from snapshot and SID

I have been reading up on the myths behind the need to change an SID for a cloned system and how a system never exposes his SID outside his own self (so there's no need for it). Previously i used to ...
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15 views

Are changes since snapshots still stored as changelogs?

It's been four years. Is the accepted answer of this question about VMWare still accurate? In other words (in case for some reason that link ever breaks), is this still true? When you create a ...
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60 views

Centos LiveCD Buffer I/O error. How to increase snapshot size?

Now I have liveCD for CentOS receive many error with buffer i/o error . however when I do check -- dmsetup status live-rw: 0 2097152 snapshot 244712/1048576 968 the 1048576 is 1 Megabit bitmap ...
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129 views

Is there a way to force restore an ElasticSearch snapshot with “unsupported snapshot state”

I am trying to restore a snapshot, but there were problems in some indices when we took the snapshot. We didn't get any errors when getting the backup, so we deleted the previous instance, but when we ...
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48 views

NAUbackup features + Snapshots

Does anybody know whether or not NAUbackup captures the memory of a vm, along with the disk, when it takes a snapshot? I'm running xenserver 6.5 on three blade servers and I setup NAUbackup to backup ...
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61 views

rsnapshot vs EC2 EBS Snapshot

Question What are the pros and cons of using rsnapshot [on a live drive] to a separate EBS volume vs using Amazon's EBS snapshot on a live drive? Background I just moved a small single server from ...
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250 views

VMware Sync Driver - fsfreeze - consistent snapshot

I'm looking for now quiet some time to the following answer, does the snapshot taken by VMWare with VMWare Tools installed with the Sync Driver are consistent on linux ? According to this article I ...
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493 views

After I clear a large number of Snapshots (approximately 1500), FreeNAS 9.3 Web GUI displays “An error occurred.” After two days

My FreeNAS 9.3 Web GUI crushed after I clear a large number of Snapshots (approximately 1500) And now, It only displays these words: An error occurred. Sorry, the page you are looking for is ...
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156 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'...
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239 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 ...