Questions tagged [snapshot]
A snapshot is a copy of data taken at a specific point in time.
465
questions
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zfs cannot create snapshot, out of space
I have a disk with these layers: sata disk, luks, zpool, ext4
The ext4 fs was created with these commands:
cryptsetup -v luksFormat /dev/sdb
cryptsetup luksOpen /dev/sda store02
zpool create zstore02 /...
- 809
0
votes
1
answer
59
views
Is there a way to re-build a physical machine (into golden image) without dedicated hardware?
I have a small office (total of 6 computers) for translation,
Due to the fact that many of the documents are private and personal and the security risk of opening word documents, pdf and so, I would ...
- 3
1
vote
1
answer
3k
views
CentOS, revert back to a clean state (by backup or snapshot) without physically going to the server [closed]
I am running CentOS 8 and I would like to rollback to a point in time (backup or snapshot), but without having to boot from USB. Many tools permit this on Windows (e.g. Macrium Reflect) and I would ...
- 135
2
votes
1
answer
5k
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zfs send multiple snapshots
I want send several zfs snapshots to another pool. Source pool "rpool", target pool "dpool"
rpool/kvm1380_img 88,6G 1,48T 77,6G -
rpool/...
- 143
0
votes
1
answer
66
views
How long has a snapshot been running?
Assume I made a snapshot of a certain VM one week ago. Today I revert to that snapshot, I think this means the delta.vmdk gets deleted (e.g. everything after the snapshot is lost). I think this also ...
- 158
2
votes
2
answers
525
views
ZFS data lost after a rollback happening on reboot
Edit1:
Unlike what I originally thought when creating this question, it seems that the problem was NOT directly caused by the unplanned power-cycle, but by a mistake I might have done with beadm in ...
- 41
2
votes
1
answer
762
views
ZFS - Deleting Redundant Snapshots
I have written a cron job to automatically create snapshots of ZFS dataset on an hourly basis for critical files that benefit from active tracking.
The drawback of this is that these hourly snapshots ...
- 299
1
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0
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735
views
Dead Citrix XenServer with LVM: How to get the VHDs off the system?
My company recently delegated the task of recovering a fairly old (~2015) Citrix Xenserver to me. The machine had a major electrical fault which caused a hard drive failure and a collapse of the RAID. ...
- 11
0
votes
0
answers
117
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ESXi 6.0 Consolidation
I had a snapshot that had eaten the free space in a datastore. I deleted the snapshot and now the snapshot manager is empty but I see delta disks and disks such as -0002.vmdk,... -0005.vmdk etc are ...
- 1
1
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2
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How to configure VMWare cloned images to get unique IP addresses?
I am configuring an internal build system using Teamcity with VMWare vSphere. Once configured, the build server is supposed to start build agent VMs using vSphere API. I've got to a point where ...
- 266
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0
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KVM/QEMU - best practice for creating snapshots of your guests regarding disk space on the hypervisor
I have several KVM/QEMU guests with each having one hard disk based on the qcow2 format. As I understand, I have two option for creating snapshots. First is to create a snapshot inside the qcow2 image:...
- 6,409
1
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1
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315
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How to extend the Ubuntu VPS storage via command line (Without GParted)
I loaded the VPS sever with 50GB snapshot VM image, so now the remaining size of the actual storage of this server is not allocated correctly which is remaining 110GB. The total size of the VPS is ...
- 173
4
votes
0
answers
824
views
Windows NTFS Data Deduplication and Snapshot Backups
We have a file server (fs00) on Google Cloud Platform (GCP):
Running Windows Server 2019 (with Desktop Experience installed).
One OS / System disk (250GB SSD)
An independent data disk (5TB standard ...
- 310
1
vote
1
answer
52
views
Network share with multiple users and snapshots
I want to make a network share with read/write and it will be accessed by multiple computers.
Every time a new computer connects to it, they should find it in an initial state.
Every change made on ...
- 85
0
votes
1
answer
2k
views
apt-get is stuck with mysql after creating a vm from snapshot in Google cloud
I'm using Google cloud and I have a vm (Ubuntu 18.04) that is working fine. The apt-get command works totally fine and mysql service is running well. Let's call it vm-1
I needed to create another a ...
- 143
1
vote
2
answers
1k
views
Unclear why crash consistent backups are unsafe for MySQL
My understanding of the InnoDB engine is that the database is always recoverable after a crash, due to the internal architecture of the engine itself. That is, InnoDB can correctly recover from a ...
- 11
4
votes
1
answer
1k
views
Can we resize the EBS volume when snapshot is in progress?
I've an ec2 instance with root volume and additional volume attached, additional volume is 92% used.
I took a ebs snapshot , but looks like its very slow.
Can I go ahead and increase the volume size ...
- 475
2
votes
2
answers
3k
views
How does deleting the oldest ZFS snapshot not break the flow of data?
I'm not new to ZFS. I've been using it a couple of years but I've only just started making snapshots and I've created a cronjob and script to take a daily snapshot of a few of my datasets, which all ...
- 133
0
votes
1
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290
views
gcloud snapshot created in region, not zone, when executed from cron job
Trying to fire off a gcloud snapshot from a cron job on a ubuntu compute-engine. When executed from an ssh session:
gcloud compute disks snapshot disk-1 --zone=us-west1-b --snapshot-names=${snapshot-...
google-compute-engine
0
votes
1
answer
845
views
gcloud.compute root cron job snapshot "Insufficient Permission: Request had insufficient authentication scope"
I've set up a cron job on a google compute ubuntu system to take a snapshot.
When run from an ssh session, the cron script creates a snapshot fine. However, when run as root from a cron job, the
"...
7
votes
2
answers
220
views
AWS snapshot automation
Sorry bit new here. I had to take over managing aws for a small company with about 10 ec2 instances. it looks like the instances are being backed up via snapshots everyday. Currently there are over ...
- 73
0
votes
1
answer
989
views
Nginx not starting exists with error: bind() to 0.0.0.0:80 failed
Recently, I created a Digital Ocean instance and set it up with a basic LEMP stack. I also connected it to a domain with this nginx configuration:
server {
listen 80;
server_name example.com ...
- 113
0
votes
1
answer
139
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 ...
1
vote
2
answers
627
views
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 ...
0
votes
1
answer
203
views
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-...
0
votes
2
answers
139
views
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?
- 3
0
votes
1
answer
5k
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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 ...
- 103
0
votes
2
answers
69
views
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 ...
- 1
0
votes
1
answer
261
views
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 ...
0
votes
1
answer
549
views
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 ...
1
vote
1
answer
1k
views
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,...
- 111
0
votes
2
answers
1k
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 ...
- 617
1
vote
0
answers
544
views
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 ...
- 21
0
votes
1
answer
923
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 ...
1
vote
0
answers
266
views
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 ...
3
votes
2
answers
785
views
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 ...
- 1,082
3
votes
1
answer
885
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 ...
- 1,145
0
votes
2
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1k
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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 ...
1
vote
0
answers
338
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 ...
- 111
2
votes
1
answer
450
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-...
- 1,543
1
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2
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799
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 ...
0
votes
1
answer
132
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,...
2
votes
1
answer
973
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 ...
- 101
3
votes
1
answer
3k
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 ...
2
votes
0
answers
149
views
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 ...
1
vote
2
answers
1k
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 ...
- 237
3
votes
1
answer
3k
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 ...
- 187
1
vote
1
answer
462
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 ...
0
votes
1
answer
537
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 ...
- 25
1
vote
0
answers
129
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 ...
- 113
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