Hyper backup & Snapshots

Discuss backup and restore functions of the DiskStation with respect other DiskStations, USB/eSATA, network backup, or other rsync clients.
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humphrey
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Hyper backup & Snapshots

Unread post by humphrey » Fri Mar 09, 2018 12:12 am

Hi,

I am trying to get my head around snapshots and wondered whether the following scenario makes sense.

1. set up snapshots for the folders that will be backed up
2. Use Hyperbackup to backup these folders (with snapshots) to a second Diskstation

In case of a disaster, I could then restore the folders with the snapshots from the second Diskstation and use the snapshots rather than Hyperbackup to go back to earlier versions of that folder.

Does this make sense? If not, what would be better?

Update: I had not realised BTRFS is supported on my backup diskstation (DS1812+), so alternatively I could opt for a snapshot with replication approach to the DS1812+. Would this be recommended over a Hyperbackup one? If so, why?

telos
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Re: Hyper backup & Snapshots

Unread post by telos » Fri Mar 09, 2018 3:34 am

I'm doing exactly that. Running snapshots of Documents on NAS1 and using HB to backup documents (w/snapshot) to NAS2

humphrey
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Re: Hyper backup & Snapshots

Unread post by humphrey » Fri Mar 09, 2018 8:47 am

Great. Have you ever tested whether a restore using both HB and snapshots actually work? What would be the advantage of this method over one using snapshot replication only?

pgotze
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Re: Hyper backup & Snapshots

Unread post by pgotze » Fri Mar 09, 2018 4:28 pm

Snapshots versus classic backups is oriented on a bit different environments, even if it solves similar demands. Snapshots are basically used in transaction environments and where data are changed very often, even hourly ar every minute snapshot is not problem. For example its good solution to make hour snapshots, or even more often, for most critical data, where you really want to secure your data. As well in support with operating system, respectively with app, whioch uses the storage for its data (so at time of snapshot generation ,all data are stored on discs from memory). Generally its oriented on business environments. On the other hand, classic hyper backup is more time consuming, so generally you dont run it often, but lets say as night job. Its slower (snapshots are very fast, consuming much less resources), on the other hand you can encrypt it and its packed and compressed, so its not transparent to anybody with access to NAS. In home environment i dont see the situation, where snapshots is better solution then classic backup.

But i can imagine classic scenario of hourly snaphosts during day and backup in the night (after backup deletion of snapshots from previous day). Question is, if this is the scenario at home, generally not.
DS918+ (4GB RAM, 2x4TB SHR, 2x256GB read/write cache) business, DS916+(8GB RAM, 3x2TB SHR) home, DS213j(512MB RAM, 1x1 TB single, 1x 500GB single) off-site backup

humphrey
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Re: Hyper backup & Snapshots

Unread post by humphrey » Fri Mar 09, 2018 5:45 pm

I did some more reading when I found this thread (https://forum.synology.com/enu/viewtopic.php?t=132212) and as a result decided to give snapshots a try in a home environment in which most data changes little so there really is no need for frequent snapshots. Yet, I went with it anyway because it is the only way in which I can create a backup with versioning which is also a mirror of the original system so that if the original NAS fails all I need to do is change the IP address of the backup NAS to that of the original one and I am up and running again immediately.

As to the frequent snapshots. I left the default setting assuming that frequent snapshots do not really take up much (if any) room when the original data has not changed.

pgotze
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Re: Hyper backup & Snapshots

Unread post by pgotze » Fri Mar 09, 2018 6:48 pm

Hyper Backup of course makes versioning as well. And can be restored out of NAS, because there is a tool for desktop. So you are absolutely independent.
DS918+ (4GB RAM, 2x4TB SHR, 2x256GB read/write cache) business, DS916+(8GB RAM, 3x2TB SHR) home, DS213j(512MB RAM, 1x1 TB single, 1x 500GB single) off-site backup

humphrey
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Re: Hyper backup & Snapshots

Unread post by humphrey » Tue Mar 13, 2018 9:17 am

Yes the versioning of HB is much appreciated which is why I use for other backup tasks, like to a local USB disk. I just cannot imagine having to wait several days before a failed Diskstation is up and running again. I experimented with HB before I switched to snapshot replication and it took the better part of 3 days to make a full backup. A rfull estore will consequently take at least as long.

pgotze
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Re: Hyper backup & Snapshots

Unread post by pgotze » Tue Mar 13, 2018 10:40 am

Wel it of course depends on your test scenarios and BCM or ITSCM processes. Snapshots have different goal of usage, than backup. Generally, if NAS is completely damaged, it might take days to even get new one.

Really depends on processes. Anyway i guess you really tested restore processes (and test regularly), so you should know real numbers and times of recovery processes.
DS918+ (4GB RAM, 2x4TB SHR, 2x256GB read/write cache) business, DS916+(8GB RAM, 3x2TB SHR) home, DS213j(512MB RAM, 1x1 TB single, 1x 500GB single) off-site backup

humphrey
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Re: Hyper backup & Snapshots

Unread post by humphrey » Tue Mar 13, 2018 11:23 pm

No I haven't tested restore processes yet (and hope I never have to), but my point was a different one. If my main DS fails, with snapshots on a second DS I can just switch to the second DS in a matter of minutes and be up and running again. Meanwhile this DS can then restore snapshots in the background to the main DS.

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