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

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9
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5answers
12k views

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 ...
2
votes
0answers
342 views

How to incrementally backup XenServer VMs [on hold]

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 ...
0
votes
1answer
10 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: ...
0
votes
2answers
2k 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 ...
0
votes
1answer
31 views

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 ...
0
votes
1answer
22 views

EC2 consistent snapshot [closed]

I have seen couple of posts regarding ec2 backup using ec2-consistent-snapshot. Need to know if its possible to have one single infrastructure backup server and from there we can have all the servers ...
0
votes
0answers
42 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 ...
0
votes
1answer
219 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 ...
1
vote
1answer
15 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 ...
1
vote
0answers
22 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), ...
4
votes
1answer
104 views

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 ...
0
votes
1answer
87 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 ...
2
votes
1answer
33 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 ...
2
votes
1answer
24 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 ...
10
votes
1answer
145 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 ...
3
votes
5answers
3k views

Handling XenServer snapshotting and cloning with ZFS SAN

I'm planning on setting up a XenServer machine that uses a NexentaOS/ZFS-based SAN for storage of the Virtual Disk Images (VDIs) through iSCSI. I know I could just setup a big Storage Repository (SR) ...
12
votes
12answers
7k 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 ...
3
votes
2answers
71 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 ...
2
votes
1answer
101 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 ...
16
votes
2answers
1k 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. ...
0
votes
1answer
188 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 ...
3
votes
2answers
3k views

Is it possible to create an EBS AMI for windows EC2 instance?

We have a Windows server (EBS backed) running in EC2. We make regular snapshots for data backups. I'd like to create a new EC2 instance from one of these snapshots. Yes, I realise this is the same as ...
3
votes
2answers
95 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 , ...
-1
votes
1answer
54 views

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 ...
0
votes
2answers
37 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 ...
0
votes
2answers
52 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 ...
3
votes
1answer
36 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. ...
0
votes
0answers
104 views

Backup / restoring a snapshot on Linode

I am trying to automate a process of creating an image/snapshot/backup (whatever it is called) of my disk at a certain point, and then restoring it back to that point later. So I am experimenting ...
9
votes
3answers
2k 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 ...
0
votes
1answer
80 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 ...
-1
votes
1answer
98 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 ...
0
votes
1answer
40 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 ...
1
vote
3answers
6k views

Is it possible to copy a snapshot and associate it to another VM (which has same configuration)?

I am having two virtual machines with same OS and software list. (In fact they were cloned). Now I have installed an application in a VM and taken a snapshot. Is it possible to copy this snapshot ...
3
votes
2answers
583 views

ext3 Snapshot Support

Does the ext3 filesystem support snapshotting? If so, is can this be done with straight partitions with no LVM? An example of "straight partitions" would be the following: /dev/sda1 /boot ext3 ...
1
vote
1answer
258 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 ...
2
votes
2answers
296 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 ...
4
votes
1answer
909 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 ...
1
vote
0answers
233 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 ...
1
vote
2answers
6k views

export XenServer snapshot as file via console

I have created a snapshot of a Citrix XenServer virtual machine using XenCenter, and now I would like to save this snapshot as an *.xva file, just as if I right-click on the snapshot icon in XenCenter ...
1
vote
0answers
130 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 ...
1
vote
1answer
2k views

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 ...
0
votes
2answers
503 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 ...
1
vote
0answers
94 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 ...
-2
votes
2answers
65 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. ...
1
vote
3answers
247 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 ...
1
vote
0answers
96 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 ...
-1
votes
1answer
138 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 ...
0
votes
1answer
129 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?
1
vote
0answers
84 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 ...
2
votes
1answer
119 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 ...