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Do ReadyNAS backup jobs work like Time Machine?
Do ReadyNAS backup jobs work like Time Machine? Specifically, do ReadyNAS backup jobs first create a local snapshot, which is then used to backup to an external drive? Like this: "Time Machi...
Oh, interesting...
To clarify, I'm currently using the RN's SMB backup to another NAS. I may use the RN's USB backup option directly to an external HD.
StephenB wrote:So you'd want to start the external drive backup first. Then you won't get the most recent computer backup, but the external drive will have coherence (not catching any backups in the middle).
If I start the backup from the RN to the external drive first, as you suggest, does that job need to finish before I start the backup job from the computer to the RN? Or can these jobs overlap?
StephenB wrote:There is a bug with push backups at the moment, so you'd want to avoid 6.10.4 and 6.10.5 firmware (using nothing newer than 6.10.3).
Good to know, thanks.
Are you referring to this bug? https://community.netgear.com/t5/Using-your-ReadyNAS-in-Business/Backups-not-working-yet-status-says-they-are-working/td-p/2102416
If so, that appears to be an rsync only bug, correct? It shouldn't impact other types of push backups from the RN (e.g. via SMB or USB)?
RNUser76 wrote:If I start the backup from the RN to the external drive first, as you suggest, does that job need to finish before I start the backup job from the computer to the RN? Or can these jobs overlap?
The jobs can overlap. Remember that the "push" job begins by making a snapshot, and then backs up the snapshot (then deletes it when finished).
As long as the RN backup begins before the computer backup, the snapshot would be coherent.
RNUser76 wrote:
Are you referring to this bug? https://community.netgear.com/t5/Using-your-ReadyNAS-in-Business/Backups-not-working-yet-status-says-they-are-working/td-p/2102416
If so, that appears to be an rsync only bug, correct? It shouldn't impact other types of push backups from the RN (e.g. via SMB or USB)?
That's the one. I'm not sure if it only affects rsync or not (I haven't tested it myself).
StephenB wrote:
RNUser76 wrote:If I start the backup from the RN to the external drive first, as you suggest, does that job need to finish before I start the backup job from the computer to the RN? Or can these jobs overlap?
The jobs can overlap. Remember that the "push" job begins by making a snapshot, and then backs up the snapshot (then deletes it when finished).
As long as the RN backup begins before the computer backup, the snapshot would be coherent.
ReadyNAS "push" backup seems to be inconsistent with what happens with Mac Time Machine: Remember that the "push" job begins by making a snapshot, and then backs up the snapshot (then deletes it when finished).
Try this: With a fresh ReadyNAS, load it up with data and immediately setup and run a "push" backup job to another NAS via SMB (although other connections may work like this, too). There's no delay, the job starts immediately transferring data to the backup NAS.
With Mac Time Machine, there's an extended lag time in the "Preparing" stage, especially on the first backup, before data begins transferring.
"If a Time Machine backup takes longer than you expect
Your first backup might take a long time, depending on the number of files to back up."https://support.apple.com/en-us/HT204412
"Time Machine - Preparing takes forever… (> 6hours)"
https://apple.stackexchange.com/questions/391948/time-machine-preparing-takes-forever-6hours
aaroam wrote:
ReadyNAS "push" backup seems to be inconsistent with what happens with Mac Time Machine:I don't understand your point.
Time Machine appears to be building a list of what to back up before it begins. That isn't unusual - Acronis TrueImage (which I use) appears to do the same. But the ReadyNAS works differently - instead it looks at each file's metadata as it goes, and makes a decision on the fly on whether it should back up that file or not.
Two different approaches, but nothing wrong with either one.
StephenB wrote:
But the ReadyNAS works differently - instead it looks at each file's metadata as it goes, and makes a decision on the fly on whether it should back up that file or not.Two different approaches, but nothing wrong with either one.
How can you write to the ReadyNAS while the ReadyNAS is making decisions at the same time about what to backup? Looks like a huge potential for conflicts to write to a ReadyNAS while it is backing up.
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