Turn off Dedup

[androkev]

Hello,

Can I turn off dedup on a dataset once it is on?
I have a dataset with dedup on and it's causing swap file issues.
I can't upgrade the memory since it's already max out at 8GB.

Thanks,

Kev

[al562]

Hi Androkev,

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Before you do anything else please see this topic and read the enclosed link: Dedup for media files. Then read SUG Section: Disks|ZFS|Datasets|Dataset for specific, important instructions on what to do.
I am not a ZFS expert yet, but as far as I know, there’s no way currently to “undedupe” a volume, once the data has been created, you’re stuck with it until you remove the files. Probably the safest and fastest thing you can do is copy everything off of the volume, turn off dedupe, get rid of the volume, create a new volume, then copy your data back. You do have another backup of your data, right?

Regards,
Al

[androkev]

Hi Al,

Thank you for taking the time to response to my question.
I read somewhere that you can't "undedupe" a volume. Just want to confirm.

I did a test where I create another dataset in the same Pool and turn off dedup.
Then I cut and paste 10GB worth of data to the new dataset share but the system became unstable after the copy and paste was completed.
The memory utilization was around 73% during and after the c&p. I was unable to refresh the data on my shares and my map drive became unavailable.
I was able to access the GUI and was also able to SSH into the system but was unable to access the share.
I reboot the system and all my shares are back online but I think the c&p from the dedup dataset to the new dataset is going to crash the system due to out of swap memory.

So I am going to plan B, backup my data to another storage. Blow away the dataset that have dedupe and recreate it and copy the data back.

Also...backup...what's that

Thanks,

Kev

[al562]

Hi Kev,

So I am going to plan B, backup my data to another storage. Blow away the dataset that have dedupe and recreate it and copy the data back.

Yes, sounds like the best option now.

.backup...what's that

Regards,
Al