By using AWS re:Post, you agree to the AWS re:Post Terms of Use
AWS re:Postre:Post

Unmount Linux File-systems Before Snapshot

0

I have an EC2 instance running ubuntu 20. I use several EBS volumes for ext4 file-systems. I want to backup the volumes with snapshots. Is it necessary for the snapshots to be taken while the file-systems are unmounted?

Topics
ComputeStorage
Tags
Linux ProvisioningAmazon Elastic Block Store
Language
English
CLKsoft
asked 2 years ago307 views
1 Answer
1
Accepted Answer

Normally it depends on type of workload running on the Filesystem.

Without unmount, snapshot is crash consistent. Based on workload (e.g. database), quiescing it will give app/db consistent snapshot. Below are some good blogs to manage the snapshot process and crash consistent snapshot.

https://aws.amazon.com/blogs/storage/automating-amazon-ebs-snapshots-management-using-data-lifecycle-manager/

https://aws.amazon.com/blogs/storage/taking-crash-consistent-snapshots-across-multiple-amazon-ebs-volumes-on-an-amazon-ec2-instance/

AWS
rePostfanclub
answered 2 years ago
profile pictureAWS
EXPERT
Brettski-AWS
reviewed 2 years ago
  • theist
    2 years ago

    Can be done w/o unmount but, at least in Linux, beware of disk caches. I find some files missing in restored snapshots, Also I found that it is leveraged by issuing a good ol' sudo sync before live snapshotting the volume.

You are not logged in. Log in to post an answer.

A good answer clearly answers the question and provides constructive feedback and encourages professional growth in the question asker.

Guidelines for Answering Questions

Relevant content