Questions tagged [snapshot]

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

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"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 ...
hyperknot's user avatar
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16 votes
1 answer
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Delete "orphan" libvirt snapshot

I am trying to live-snapshot using KVM as per this procedure. I must have messed up at some point because I'm in a state I don't understand. My VM is called prod. It was created in file /srv/vm/prod....
Jérôme's user avatar
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4 votes
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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@...
eKKiM's user avatar
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How to create an AMI excluding all attached volumes for all instance within VPC using shell script

I have written script to find instance-id from VPC n create AMI of each instance-id : #!/bin/bash #Script to Automate AMI backup echo "----------------------------------\n `date` \n--------------...
Ashish Karpe's user avatar
1 vote
1 answer
760 views

ec2 create-image will it backup attached ebs volumes?

$aws ec2 create-image --instance-id xxx --name yyy --description "zzzz" --no-reboot This created AMI image of EC2 instance but did not created extra attached volume's snapshot ! So is there any ...
Ashish Karpe's user avatar
11 votes
2 answers
20k views

Backup of running KVM qcow2 VPS

I want a robust method of taking backup of KVM VPS of qcow2 file, while running. After searching for a long time I found that we can use rsync for live backup. I used following command for rsync: ...
Bosco D'mello's user avatar
0 votes
1 answer
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AWS snapshots before O.S. updates

I've read over the AWS Snapshot docs, but still have a question: When taking a snapshot of an instance before doing yum updates to the O.S.: - I have to snapshot each mounted volume separately, even ...
Lyle's user avatar
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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: ...
masber's user avatar
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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 ...
陳敬翔's user avatar
1 vote
1 answer
673 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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5 votes
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NetApp Backup Strategy - Snapshots to SnapMirrors to Tape?

In a previous question we discussed the pros and cons of relying exclusively on NetApp snapshots for backups. I now find myself in this situation as our aging legacy Symantec BackupExec tape server ...
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748 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 ...
sa289's user avatar
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1 vote
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202 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), ...
Danny's user avatar
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Restore an entire virtualized domain to earlier state?

We have set up a lab environment in our office to run various cybersecurity simulations. We are using ESXi 6.0 (VMWare) and we have a domain controller with 3 servers. I know that snapshotting domain ...
Shrout1's user avatar
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5 votes
1 answer
4k views

AWS EC2 snapshots - how long should they be retained? [closed]

How long should daily EBS-backed EC2 snapshots be retained? We're using ec2-automate-backup to backup (daily) two EBS volumes - OS and data - pertaining to a web application. If I've understood, in ...
toby1kenobi's user avatar
2 votes
1 answer
2k views

NetApp - Snapshot Full

I am seeing a bunch of Snapshot Full warning events being generated recently from various volumes on our filers: A Warning event at 22 Jun 10:03 Alaskan Daylight Time on Snapshot ...
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15 votes
1 answer
24k views

Incredibly slow snapshot removal

I have an ESXi box with HP LeftHand storage exposed via iSCSI. I have a virtual machine with a 1TB disk, of which 800GB is consumed. The disk is thick provisioned on the LeftHand storage. A snapshot ...
Mark Henderson's user avatar
6 votes
1 answer
7k views

Is there anything I can do to speed up snapshot speeds?

I have 3 SSD EBS volumes mounted to my database server. The main data volume is 10TB, the journal volume is 1TB, and a 3rd volume is 100GB. When I take a snapshot of the 3 volumes, the 1TB journal ...
chris's user avatar
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3 votes
2 answers
2k views

Where are diskshadow snapshots stored?

I am evaluating DISKSHADOW utility to take MSSQL database snapshots. I use the below set context persistent set option rollbackrecover txfrecover set verbose on begin backup add volume d: alias ...
M N Manikantan's user avatar
3 votes
2 answers
17k views

qemu-img snapshot on live VM

I have created multiple KVM VMs using QCOW2 images. Each VM has its own qcow2 file and is not based on any backing file. My question is specifically related to snapshots of QCow2 images on these ...
user1066991's user avatar
3 votes
2 answers
3k views

Linux live hot backup snapshot

I have a VPS with linode and they have hot backup of running system. I have multiple times restored the image when I do something stupid or mess up some install etc How do they do live hot backup , ...
doesnt_matter's user avatar
0 votes
2 answers
123 views

during snapshot merging... are deleted transactions ignored?

If i take a snapshot in vmware/vbox for example and soon after i delete a 5GB file.. the snapshot delta file will grow +5GB with the deleted files content to allow it to be recovered by restoring the ...
Flo Woo's user avatar
  • 311
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2 answers
179 views

Azure Snapshot without losing IP

I have several VMs running, but sometimes i have to clone them to make a sandbox server on where i can run trials and procedures, the problem is that everytime i make an image the VM stops and reboots ...
Chico3001's user avatar
  • 253
-1 votes
1 answer
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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 (pipe:[23409]...
sangita's user avatar
5 votes
1 answer
531 views

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. ...
Álex's user avatar
  • 203
0 votes
1 answer
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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 to ...
hemc4's user avatar
  • 115
1 vote
1 answer
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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 ...
Onitlikesonic's user avatar
0 votes
1 answer
356 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 "...
Junaid Shahid's user avatar
6 votes
1 answer
16k 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 ...
e4rthdog's user avatar
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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 ...
pgn674's user avatar
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2 votes
2 answers
532 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 ...
leeand00's user avatar
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1 vote
0 answers
769 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 ...
B14D3's user avatar
  • 5,258
0 votes
2 answers
2k 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 ...
johnny's user avatar
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2 votes
1 answer
2k 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....
Paul Tomblin's user avatar
  • 5,235
19 votes
3 answers
5k 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. ...
VM_Storage_Inception's user avatar
2 votes
0 answers
2k 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 ...
joe's user avatar
  • 121
-1 votes
1 answer
450 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 ...
user2518618's user avatar
1 vote
3 answers
1k 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 Workstation\...
VM_Storage_Inception's user avatar
2 votes
1 answer
5k 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 ...
Bas Peeters's user avatar
2 votes
1 answer
2k 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?
Gene Diaz's user avatar
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1 vote
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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/...
Stephan Richter's user avatar
2 votes
1 answer
253 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 ...
jladsfaljsdfjladsf's user avatar
1 vote
1 answer
129 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 ...
sampleuser's user avatar
1 vote
1 answer
2k 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: root@...
loopbackbee's user avatar
  • 1,405
0 votes
1 answer
120 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 ...
Mohammadreza MontazeriShatoori's user avatar
2 votes
0 answers
1k views

How to incrementally backup XenServer VMs [closed]

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 ...
Lefty's user avatar
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1 vote
0 answers
745 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 ...
Elaci0's user avatar
  • 11
0 votes
1 answer
924 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 ...
Purres's user avatar
  • 239
-2 votes
2 answers
3k views

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. (HKEY_CURRENT_USER\...
Florian Bidabé's user avatar
8 votes
2 answers
23k 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 ...
mlissner's user avatar
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