Questions tagged [snapshot]

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

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22 views

Gcloud compute snapshot of re-created disk is not complete?

I recently recreated a disk / vm image in google compute from a previous set of snapshots. Those snapshots are currently dated and sized as follows: - May 20 60 MB - May 21 372 MB - May 22 ...
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Why ZFS snapshot reports zero size?

I have a Centos7 system with zfs pool that I took a snapshot with sudo zfs snapshot -r data-pool/Samba@backup_r. After taking the snapshot I copied few gigabytes of files from my Windows pc to that ...
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gcloud compute engine - multiple full backups / snapshots / machine images?

On a gcloud debian vm instance, I would like to create full backups and rotate them, e.g. one per day of week one per week one per month one per year That is, each daily would get over-...
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ZFS and LXC Snapshots issue

Good Morning, I have a question about ZFS, because I'm a beginner. Situation: I snapshoted a lxc running on a zfs disk. Inside the container i saw a root-dir/disk size of 60-70 GB. However after that ...
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qemu snapshot exclude device

I'm searching the web for a solution to exclude qemu devices from snapshoting like it exists for virtualbox and vmware with "persistent" or "independent" as parameter. (ref. Exclude file storage from ...
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Snapshots could fail if VM are running delta files?

On VMware 6.5, VMs are running on CTK Delta files, could this causes inconsistency on storage level snapshot?
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AWS: difference between instance snapshot and volume snapshot

What is the difference between an AWS instance snapshot and volume snapshot? I am implementing "Lifecycle Manager", and my goal is to create a system that will allow for fast recovery of a server in ...
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Unable to redeploy Azure Ubuntu VM after OS Disk Super block corruption

One of our production VM had a kernel panic due to corrupt super blocks on the os Disk. I am unable to connect via serial console and have followed the recovery process for snap shoting the DISK in ...
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What would you call this “RAID” ? RAID 1+6? [closed]

I have Snapraid running as snapshot RAID6 (2-parity disks) for my 9 disk array which calculates new parity once a day. Then I have Drivepool duplicating certain very important folders on the array to ...
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Google cloud VM and scheduled snapshots on attached persistent disk

in the case of scheduled shapshots on a persistent ssd disk mounted on a VM, I read in the doc that the backup must not be set here /etc/fstab to ensure that the disk mounts on its own when the VM is ...
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Why would deleting an incremental snapshot increase the space usage & cost? [closed]

Google Cloud Platform From the Google Cloud docs: https://cloud.google.com/compute/disks-image-pricing#persistent_disk_snapshots When you delete a complete or incremental snapshot, some of its ...
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VMWare storage usage during consolidation

We current have a bit of an issue where a VM with removed snapshots needs consolidation, but will not complete due to lack of space. It seems like it needs to merge all snapshots into a single file, ...
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AWS Fast snapshot restore : cost and restore time

I'm confused about fast snapshot restore... Pricing is at around $0.75 per DSU hour which, assuming you pay for every hour the snapshot exists, is $6000+ a year so I can't have it on all the time. Or,...
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Layout of btrfs snapshots - single common parent vs each snapshot as parent of the next one

Let's say that I want to make a daily snapshot of /mnt/storage in /mnt/backup/. /mnt/storage/ is ext4, /mnt/backup/ is btrfs. For this purpose I will be using rsync. After a while, /mnt/backup should ...
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141 views

Bulk delete ec2 snapshots from Jenkins

Use case: Export list of snapshots in txt file (old_snapshots.txt) to S3 bucket. From Jenkins, use aws cp command copy file to Jenkins /tmp/directory --dry-run did not show any error However, when ...
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Samba Issue time with shadow copy

I was wondering if someone else has any experience with this before? Currently Version: 6.1 zentyal and Samba version 4.7.6-Ubuntu The time in the shadow copy does not show correct on the windows ...
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110 views

Restoring logical volume from GCP/GCE snapshot

I recently carried out a recovery test on a Google Compute Engine VM with a Centos 7 OS. The VM has five partitioned disks managed by LVM. The server has been around for a while so there are about ten ...
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lvconvert --merge not completing

I have a root LVM "lvroot" and a snapshot of that root LVM "rootsnap". I broke something in lvroot when performing an initramfs update and can't boot into it, so I booted from the rootsnap snapshot ...
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Copying large snapshot images to remote storage Linux

I need to copy snapshots of virtual machines running on Proxmox (KVM) servers and copy the snapshots to offsite storage. Most snapshots are a few gb, but some are rather large, up to 200gb. I would ...
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1answer
141 views

How to replace ZFS pool root with a snapshot after replication

I'm replacing some failing disks with new ones, and rather than replace them one by one I have created a new ZFS pool on the new disks, and copied the old pool over to the new one. I did this at the ...
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134 views

recover/ restore the single file from snapshot GCP

I want to restore the a file deleted by my customer , i have a snapshot of that day ,how can i restore the file without creating new vm and coping the file,Is it possible to restore a single 10 mb ...
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47 views

Is there a way to find out how much RAM ZFS snapshots are using?

We want to keep quite regular (5 minute) snapshots of certain zvols. But are also concerned about how long we should be keeping them and how much memory they use. Is there a way to check how much ...
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1answer
78 views

How to detect VMware snapshot presence from within VM?

I want to perform Linux fstrim or Windows degrag retrim on a file system within VM to shrink VMware vSphere thin disks. However this should be performed only if there is no snapshot present as fstrim-...
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85 views

how to attach snapshot policy by label to all the vms in my project?

I have created the snapshot schedule policy with label daily,weekly,hourly.But I want an automate way so whenever i create the vm label based policy should be assigned to vm. or automatically attach ...
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55 views

Which could be the best method for backup, Azure backup or thru snapshot method?

Anybody work with pricing on those two methods? If so, what is the pros and cons to define. Which could be the best method for backup and restore in Azure; is it Azure backup or thru snapshot method,...
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1answer
123 views

How to thin out snapshots on Freenas

I do have a freenas server as backup server - every evening it creates a snapshot of a dataset and some minutes lates an rsync task starts to backup the data to my freenas. In the webui I only have ...
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18 views

Disable final snapshot when creating a database using AWS ElasticBeanstalk CLI

I am looking for the command line flags that tell eb create to create a RDS database within an AWS ElasticBeanstalk environment, but at the same time to disable the automatic snapshot that will be ...
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1answer
434 views

Is it safe to send ZFS-snapshots incrementally ignoring some intermediate snapshots?

Some background. I'm using ZREP to replicate two servers with each other and each server contains one ZFS-pool containing two datasets as replication master and two sets as replication target. The ...
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NetApp: How to get real file's access time (atime) from a snapshot?

According to the documentation (https://library.netapp.com/ecmdocs/ECMP1635994/html/GUID-3CE08FEA-6624-4EBF-847C-F7F9C7F355A3.html) access time of all files in the snapshot copy is set to snapshot ...
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2answers
382 views

How to create a ZFS-On-Linux pool replication (main -> backup)

I am currently running two identical servers with same harddisks. Both have a zfs pool on sda and sdb (raidz) named /pool both run ubuntu linux server Both supposed to operate on vanilla toolset (no ...
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1answer
229 views

can I export an EBS snapshot and mount it to an on-prem server

I have a scenario where data is being aggregated in an EBS-backed AWS EC2 instance and, periodically, that instance is shut down and snapshot. Ideally, the snapshot of that volume needs to be exported ...
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1answer
113 views

Apache Cassandra repair snapshots are not deleted

On a Cassandra cluster running Apache Cassandra 3.11.4 that is repaired using Cassandra Reaper 1.4.1, I am experiencing the problem that the snapshots that are created by the repair process are ...
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1answer
85 views

The most efficient way to save LVM snapshot to a file

I have a tricky problem with a backup strategy. The problem is with disk performance and so far I cannot do a lot about it (as well as meddle with, let's call it, pipeline design), so I was wondering ...
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57 views

Populate Snapshot manager with missing snapshots or revert to one manually?

Is there a way to populate the Snapshot Manager with snapshots that are listed in the datastore but not under Manage Snapshots. Is there a way to either populate Manage Snapshots or using something ...
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1answer
64 views

Why a frozen snapshot of a LV is changing continuously?

Before I install gcc-8.3.0, I take a snapshot of the root("/") LV as following command: lvcreate -L 20G -s vgsys/lvroot -n lvroot_gcc7 Then, I installed gcc-8.3.0, and taked another snapshot of the ...
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458 views

Google Cloud / GCP Scheduled Snapshots

Recently (14th Feb 2019) Google released the "scheduled snapshot" feature for Compute Engine (https://cloud.google.com/blog/products/compute/introducing-scheduled-snapshots-for-compute-engine-...
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337 views

Scheduled snapshots wont run Google Compute Engine

I have configured a snapshot schedule for one of my disks on Compute Engine, but after the scheduled time (way after), no snapshot is listed on the snapshots section. I ran a manual snapshot with ...
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1answer
122 views

Can xvdc block devices on a Windows AMI be ignored?

After performing the steps in Is it possible to create an EBS AMI for windows EC2 instance? to create a Windows AMI from an "other linux" snapshot, I created an image of the fixed instance and the ...
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1answer
2k views

How to delete a snapshot not seen with virsh but can be seen with qemu-img info?

[msingh@centos images]$ qemu-img info IE11-Win7-VMWare-disk1.qcow2 image: IE11-Win7-VMWare-disk1.qcow2 file format: qcow2 virtual size: 40G (42949672960 bytes) disk size: 82G cluster_size: 65536 ...
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1answer
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Create Azure VM from Snapshot if Disk Deleted Possible?

We deleted a VM as it was no longer needed. Prior to deleting we took a snapshot. The VM hard drive (OS) disk still exists but we're looking to clean up unused resources. If I delete this disk, can I ...
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285 views

rsync --link-dest. Time to 'building file list" incrementing

I've been running rsync as a cygwin task on Windows Server 2008 for about two months now. I'm using the --link-dest option to do a daily 'snapshot' of the contents of a server containing about 10TB ...
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1answer
339 views

Q: Unable to create 'live' snapshot of running KVM using virsh

I was kindly directed to here, Serverfault from Stackoverflow to pose my question. I'm running the following command on a RHEL7 hypervisor to create a live backup (disc image) of a running kvm, ...
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1answer
1k views

ZFS test rollback doesn't work as expected

I am confused about how ZFS snapshots and rollback are supposed to work. I have a zpool containing a couple zvols (each made from partitions of a mirrorvdev). I make a snapshot like this: ~$ sudo zfs ...
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1answer
380 views

AWS AMI from Snapshot - Unable to Create Instance of Same Type

I've scoured Google and the AWS developer forums pretty thoroughly (I think) and can't seem to find an answer. I'm snapshotting EBS volumes with boto3 daily for DR purposes. Some of the instances ...
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25 views

Evidences for VMWare Snapshot restoration from Guest OS

I have few VMWare servers managed by an external company and I suspect a snapshot restoration happened on one of my server (MS Windows 2008 Server). I suspected this because there was a windows ...
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3answers
260 views

Clone AWS instance and volume and apply new network settings

I have a machine instance and attached volume that I would like to clone, but apply new network settings to it. What is the best process for doing this, which will leave the original instance ...
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1answer
499 views

How to save scheduled XenServer VM backups to external drive

Server: XenServer 7.1 Management: XenCenter Goal: Have a Scheduled Snapshot saved to an external drive connected to the server via USB Issue: The server recognizes the external drive as a removable ...
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1answer
51 views

Is using snapshots in AWS a reliable way to back up data?

I am looking at backup options within AWS and while instance snapshots are the obvious way to go I am have some concerns about using that method. I'd like to take daily snapshots of each instance ...
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1answer
57 views

Replacing root filesystem with EC2 snapshot

This documentation describes "Restoring an Amazon EBS Volume from a Snapshot". Having done that this documentation explains "Making an Amazon EBS Volume Available for Use on Linux" What I'd now ...
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1answer
128 views

network configuration after restoring a snapshot on newly created VPS instance

I have a website up and running on a VPS instance from Vultr running Ubuntu 18.04LTS, everything is fine. I wanted to try out a snapshot of the instance in a restore session just in case something bad ...

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