25 votes
Accepted

Delete "orphan" libvirt snapshot

The proper method was virsh snapshot-delete prod --metadata snap (This command can be found on the wiki. I tried it before asking here but it failed due to a typo that has been corrected since.) I ...
  • 575
20 votes

AWS EC2 what is a reservation ID exactly and what does it represent?

The ResearvationId has nothing to do with Reserved Instances. It is a unique value indicating a request to launch EC2 instances. A launch request may come from the cli, AutoScaling, or the AWS ...
  • 9,804
17 votes

Is running permanently in a VMWare snapshot bad for performance?

Yes, there are performance implications for long-running snapshots. There are even greater implications for consolidating delta VMDKs back to the original disk file. This can cause unresponsiveness in ...
  • 196k
17 votes
Accepted

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

The amount of time it takes EC2 to build a snapshot is directly proportional to the number of modified blocks that volume has seen since the last snapshot. In the case of your journal, that sees a lot ...
  • 109k
15 votes

Best compression for ZFS send/recv

Things have changed in the years since this question was posted: 1: ZFS now supports compressed replication, just add the -c flag to the zfs send command, and blocks what were compressed on disk will ...
  • 1,256
15 votes
Accepted

AWS EC2 snapshots - how long should they be retained?

I can literally delete all but the most recent with impunity Assuming you don't need any data that was already deleted or overwritten on the volume when you took the most recent snapshot, that's true....
13 votes

Backup of running KVM qcow2 VPS

The only thing you are missing is to quiesce the guest filesystem before taking the snapshot, to ensure that it is consistent. This can be done with virsh domfsfreeze if you are using libvirtd. For ...
13 votes
Accepted

How to know the snapshot completion time in AWS EC2?

The completion time is generally not important, as the snapshot is of the volume as at the time you request it, even if you change it while the snapshot is being made. It can take several hours, but ...
  • 30.8k
12 votes
Accepted

How long will it take to create a new EBS volume from a 1TB snapshot?

How can I figure out how long it will take to create the new EBS volume? Create one. And then, try using it. Continue using it over a period of hours and days, and note what you observe. The first ...
9 votes

RDS snapshot: how long does I/O suspension occur?

The answer comes from understanding how snapshotting works. At the start of a snapshot, a message (command) is sent to all applications to come to a consistent state and flush necessary data to disk. ...
  • 4,404
8 votes
Accepted

How much space NAS snapshots consume?

Most NAS snapshots implement copy-on-write, so the snapshot itself initially takes up no space (or next-to-none, there is some overhead). But any block that is changed whilst the file it's part of is ...
  • 78.7k
8 votes
Accepted

VMware Snapshot Longer than 3 days

How do other organizations deal with this? I do more or less what you're doing. Keeping snapshots around for a few days for a specific reason isn't bad. You just need to make sure to not forget about ...
  • 109k
7 votes
Accepted

Shutting down machine while deleting large snapshot

No you can't! The process of deleting the snapshot actually consists of committing the changes that were made in it. ESXi won't let you change power state during this process (forcing it off by taking ...
  • 8,158
7 votes

VMware Snapshot Longer than 3 days

In my opinion, the simplest way will be just to backup VMs regularly, as @EEAA mentioned before. We have quite large amount of VMs running in our environment. So we configured backup Every 1 week. ...
  • 4,837
7 votes
Accepted

How to set the number of snapshots zfs-auto-snapshot should retain?

Here is a sample of one of my system's /etc/cron.d/zfs-auto-snapshot. PATH="/usr/bin:/bin:/usr/sbin:/sbin" */5 * * * * root /sbin/zfs-auto-snapshot -q -g --label=frequent --keep=24 // 00 * * * * ...
  • 196k
7 votes
Accepted

AWS snapshot automation

You may have to look in CloudTrail to find out what IAM Role was used to create the snapshots. That should take you in the right direction - whether it's a CloudWatch role, EC2 role, or some external ...
  • 24.1k
6 votes
Accepted

How to do a snapshot of a Datastore on esxi vmware - datastore snapshot as fast recovery backup

Snapshots aren't backups! You really need to follow 3-2-1 backup rule to ensure your data is safe. To accelerate your tape backup and recovery process I'd suggest to go from Disk-to-Tape to Disk-to-...
6 votes
Accepted

Google Cloud disk multiple snapshot schedules

Google Cloud supports only one "attached" snapshot schedule for persistent disks. Creating scheduled snapshots for persistent disk
  • 4,404
5 votes
Accepted

AWS RDS CLI: AccessDenied on CreateDBSnapshot

It is indeed strange, but it appears that the CreateDBSnapshot permission also has to be assigned to the destination snapshot. This policy works: { "Version": "2012-10-17", "Statement": [ ...
5 votes

Why are snapshots considered as temporary backups not real backups?

I know this post is a little old, but the question and points raised are still very relevant. VMware snapshots are definitely not backups. Worse side effect that I had happen to me and numerous ...
  • 61
5 votes
Accepted

How Do I Remove Files Stored In a VMDK?

At this point, it's going to be much quicker and easier to restore this VMDK from the backup copy you hopefully have. Snapshots are delta disks, and by deleting the earliest one, you have probably ...
  • 53.5k
5 votes

Is this btrfs snapshot removal performance normal?

In the CoW world (BTRFS and ZFS, basically), removing a snapshot/subvolume require many "heavy" metadata operations, which imply many head seeks. This is due to the filesystem parsing its own ...
  • 44.5k
5 votes
Accepted

How do I make a VMWare VM not be running on a snapshot?

Why wouldn't "You are here" be at the top? It's just the way that snapshot manager displays the snap-tree is all. If you're happy with where your VM is right now then just delete all snapshots and ...
  • 101k
5 votes

Scheduled snapshots wont run Google Compute Engine

I guess the issue is resolved now. It is working fine now. I also tried to do a small video on procedure to show how scheduled snapshot works... The YouTube link is https://www.youtube.com/watch?v=...
4 votes

Which filesystems offer snapshot functionality for users to recover data?

As of 2022, btrfs is considered stable for non-RAID setups, and it offers transparent and stable snapshots. The top answer is from 2011 and mentions that both btrfs and ZFS are considered unstable. 11 ...
4 votes

Is running permanently in a VMWare snapshot bad for performance?

ewwhite's answer is correct, but just to expand a bit more or the performance penalty, consider the following scenario: You create a VM. A virtual read from the vmdk takes one physical disk read of ...
4 votes

Long running VMWare snapshots are bad.... but what about VMDKs on a ZFS\LVM snapshot?

Don't focus on snapshots. It's clouding your judgment :) VMware has templating and cloning functionality built into vCenter. You need a $600 vSphere Essentials license to enable this. You can ...
  • 196k
4 votes

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?

Without application-level quiescing, your backups would be crash-consistent. The recovered VM would look like it had suddenly had its power cut off... For your purposes, it's important to understand ...
  • 196k
4 votes
Accepted

NetApp - Snapshot Full

You should use snapshot autodelete. Without it, snapshots that exceed the reserve don't get deleted by default. Snapshot autodelete can be configured to behave several ways. The one I use is to set ...
  • 8,821
4 votes
Accepted

NetApp Backup Strategy - Snapshots to SnapMirrors to Tape?

I would advise seeing whether your backup software can initiate and manage SMTape backups from your secondary site. Even if it can't, you can use it through the Netapp CLI to back up the entire volume....
  • 8,821

Only top scored, non community-wiki answers of a minimum length are eligible