So im on BRFS and have set things up but i cant seem to get it to use said swap file 

 

Clicking start does nothing

On 3/29/2021 at 11:18 PM, BomB191 said:

So im on BRFS and have set things up but i cant seem to get it to use said swap file 

 

Clicking start does nothing

The same for me!

Did you read the last post on the previous page?

Im having the same issue. 

 

Mine is set to "/mnt/cache-nvme/swap/" so I ran the below commands;

- cd /mnt/cache-nvme/swap/
- truncate -s 0 ./swapfile
- chattr +C ./swapfile
- btrfs property set ./swapfile compression none

 

everything looks fine, and I don't get any errors.

 

I see "Swap file exists: ✔" but when I click "start" nothing happens and it still shows "Swap file in use: ✖"

I have had the same issue with the plugin before, particularly when using large swapfiles. Run 

swapon /mnt/cache-nvme/swap/swapfile

 

@primeval_god thanks for the tip, I tried running the command and got the following output, and the swap is still not enabled. 
 

swapon: /mnt/cache-nvme/swap/swapfile: insecure permissions 0666, 0600 suggested.
swapon: /mnt/cache-nvme/swap/swapfile: read swap header failed

After some googling I see people using other Linux distorts running “mkswap”, but they are all referring to a swap partition. I’m not sure if that’s the correct fix for unraid. 

On 5/1/2021 at 9:57 PM, relink said:

@primeval_god thanks for the tip, I tried running the command and got the following output, and the swap is still not enabled. 
 

swapon: /mnt/cache-nvme/swap/swapfile: insecure permissions 0666, 0600 suggested.
swapon: /mnt/cache-nvme/swap/swapfile: read swap header failed

After some googling I see people using other Linux distorts running “mkswap”, but they are all referring to a swap partition. I’m not sure if that’s the correct fix for unraid. 

No you definitely need to run mkswap on the file before using it. I didnt notice that the steps you had posted skipped that. Your missing steps are (note 1G for a 1GB swapfile).

Quote

fallocate -l 1G /mnt/cache-nvme/swap/swapfile

chmod 600 /mnt/cache-nvme/swap/swapfile

mkswap /mnt/cache-nvme/swap/swapfile

swapon /mnt/cache-nvme/swap/swapfile

 

Edited May 3, 20215 yr by primeval_god

1 hour ago, primeval_god said:

No you definitely need to run mkswap on the file before using it.

Thank you for laying that out for me, I had no idea those steps were required to make this plugin work. But it is definitely working now.

 

oom errors are rare, but it's nice to have a safety net now. 

 

5 minutes ago, relink said:

I had no idea those steps were required to make this plugin work.

They are not meant to be required, I believe that this plugin just hasn't been updated to account for swap file support in BTRFS.

On 5/3/2021 at 4:28 PM, primeval_god said:

They are not meant to be required, I believe that this plugin just hasn't been updated to account for swap file support in BTRFS.

Last I checked which was 2-3 months ago I noticed the same, no support for swap file on BTRFS. As a workaround I've made a User Script to perform the commands from Archlinux wiki (some conditionally) during Array startup.

Edited July 12, 20214 yr by artafinde

@artafinde Also since you last checked this plugin has been forked and the fork supports swapfiles on BTRFS.