Solved

Zfs nexenta snapshots

Posted on 2013-01-20
7
1,059 Views
Last Modified: 2013-01-25
Please clarify snapshots on zfs nexenta: best practises, use etc.
0
Comment
Question by:janhoedt
  • 4
  • 3
7 Comments
 
LVL 117

Expert Comment

by:Andrew Hancock (VMware vExpert / EE MVE)
Comment Utility
1. Ensure you have enough storage space in the ZFS pool.

2. Setup a Snapshot, as you would a Backup, one a day, twice a day.

3. Make sure you delete older snapshots after your retention period.

Make sure if you do use Snapshots for Backup and Restore you test them, you may want to tie in with VMware Snapshot at the same time the Nexenta Snapshot is created to maintain a consitent backup.

Overview of ZFS Snapshots

http://info.nexenta.com/rs/nexenta/images/white_paper_nexentastor_zfs_snapshots_and_replication.pdf
0
 

Author Comment

by:janhoedt
Comment Utility
Thanks! All I now would like to know: what can I safely enable by deafult?
During setup Nexenta there was a certain option, don't know it anymore but it mentioned that it speeds up functioning of Nexenta although I had to make sure an UPS was attached.

Therefore I'd like to have a quick backup solution (other backup solution are failing right now: VDP, VDR).
0
 
LVL 117

Expert Comment

by:Andrew Hancock (VMware vExpert / EE MVE)
Comment Utility
snapshots are very quick!

probably a write cache option if UPS was required.
0
IT, Stop Being Called Into Every Meeting

Highfive is so simple that setting up every meeting room takes just minutes and every employee will be able to start or join a call from any room with ease. Never be called into a meeting just to get it started again. This is how video conferencing should work!

 

Author Comment

by:janhoedt
Comment Utility
Thanks! But all I now would like to know: what can I safely enable by deafult and what happens if I restore a snapshot?
0
 
LVL 117

Expert Comment

by:Andrew Hancock (VMware vExpert / EE MVE)
Comment Utility
Just enable snapshots to be completed daily at a specific time.

when you have restore a snapshot, you have rolled back the zfs pool to the same state it was when the snapshot was taken, in a very similar fashion to VMware Snapshots. (e.g. Revert)
0
 

Author Comment

by:janhoedt
Comment Utility
Thanks, but that means you revert for ALL vm s and cannot restore one of the vm s.
0
 
LVL 117

Accepted Solution

by:
Andrew Hancock (VMware vExpert / EE MVE) earned 500 total points
Comment Utility
That's correct.

But that depends on how you have configured your SAN.

If you had a VM per iSCSI LUN, that does not apply.

you can mount the existing saved snapshot, and restore a VM individually.
0

Featured Post

IT, Stop Being Called Into Every Meeting

Highfive is so simple that setting up every meeting room takes just minutes and every employee will be able to start or join a call from any room with ease. Never be called into a meeting just to get it started again. This is how video conferencing should work!

Join & Write a Comment

This article is an update and follow-up of my previous article:   Storage 101: common concepts in the IT enterprise storage This time, I expand on more frequently used storage concepts.
Create your own, high-performance VM backup appliance by installing NAKIVO Backup & Replication directly onto a Synology NAS!
Teach the user how to rename, unmount, delete and upgrade VMFS datastores. Open vSphere Web Client: Rename VMFS and NFS datastores: Upgrade VMFS-3 volume to VMFS-5: Unmount VMFS datastore: Delete a VMFS datastore:
Teach the user how to use vSphere Update Manager to update the VMware Tools and virtual machine hardware version Open vSphere Client: Review manual processes for updating VMware Tools and virtual hardware versions: Create a new baseline group in vSpā€¦

762 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question

Need Help in Real-Time?

Connect with top rated Experts

9 Experts available now in Live!

Get 1:1 Help Now