Server Fault Stack Exchange
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Questions tagged [snapshot]

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

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

460 questions
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Google Cloud disk multiple snapshot schedules

Is it possible to have multiple snapshot schedules assigned to a single disk in Google Cloud Compute Engine? My goal is to have a daily snapshot schedule with a certain retention policy and a weekly snapshot schedule with a different retention…
Jeff
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How much space NAS snapshots consume?

I am trying to understand how snapshots on NAS work. Let's say that I have a 10GB share on NAS. I create a 1GB file. A daily snapshot is taken. After that I delete the file, but the snapshot remains. How much available space will I have? I assume…
Alex
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Is this btrfs snapshot removal performance normal?

I have several boxes running Debian 8, dovecot and btrfs. I'm using btrfs snapshots for short term backup. For this purpose I keep 14 snapshots of the mail subvolume. Performance is OK until it comes to snapshot removal: as soon as btrfs-cleaner…
tim
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Figure out the used space on the snapshot thin volume

I have the following lvm configuration. Hard Disk: /dev/sdb (Size 10 GB) VG: vg_root on /dev/sdb THIN_POOL thin_pool occupying the whole physical extent lvcreate -y --extents 100%free --thin vg_root/thin_pool Thin volume on the thin pool lvcreate…
gudge
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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 catastrophically failed while rebuilding its RAID-1…
user62491
5
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1 answer

AWS EC2 snapshots - how long should they be retained?

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 the event of failure we could create new instances…
toby1kenobi
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2 answers

What are the tradeoffs between using hypervisor- vs. storage-array-based snapshots as backup sources?

Suppose you have some virtual machines (running in eg. ESXi) that are stored on an iSCSI storage array (eg. EqualLogic PS4110). Now suppose you want to set up a backup and restore regime that looks something like this: VMs are quiesced snapshots…
alx9r
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2 answers

Robocopy, do not overwrite existing files, but copy the changed / new ones

Is it possible to mirror the two directories without overwritting the files in destination directory with new/changed/deleted files. Something like snapshots. Example: Copy the source directory with all files and sub-directories to destination…
I don't know.
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Amazon EC2: Restoring Windows EBS snapshots into AMIs or Instances?

As my Windows EC2 instance lives, starting and stopping many times a week, it evolves. These changes get saved to it's EBS volume, so state is persistent across reboots. Now, periodically I backup the (evolved) EC2 instance to a new AMI (which…
DeepSpace101
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After restoring a HyperV snapshot, I get "the trust relationship between this workstation and the primary domain failed"

I have a Windows Server 2008 R2 HyperV machine. I had to restore it to an old snapshot, and now I'm getting the following error when logging in through remote desktop using a domain ID: "the trust relationship between this workstation and the…
Jim
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2 answers

How to export a specific virtualbox snapshot as a raw disk image

I created a Linux appliance for my friends. It's a small Ubuntu installation with Trac, lighthttp and ufw configured. I made it using VirtualBox. Now I want to export the latest snapshot version with everything secured and configured as a raw disk…
Bryan Hunt
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5 answers

where are kvm-snapshots stored?

I run several VM's on KVM/ubuntu, which all get started with the -snapshot parameter (the VM's only compute several things which can be destroyed after reboot). Out of the docs I've read, the changes are not written back to the image, but stored in…
bmaeser
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Will a Solaris server tolerate a ZFS pool from its future?

My experience with ZFS has generally been that it just works, so I expect the answer will be, it’s not a problem — but I have a data pool which will ruin my January if it fubars, so I want to double-check. This is a question that could actually come…
Kevin
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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 snapshot nvme-tank@roll_test Then I boot a VM…
Stonecraft
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2 answers

ZFS snapshot zd0 block device

I'm trying to make use of the ability of zfs snapshots. To explain a little how it's configured on my end: zpool create vol0 mirror /dev/sda /dev/sdb zfs create -o volblocksize=128K -V 15T vol0/pprovol I got my ZFS volumes: NAME USED …
g00gle
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