Free space only from first drive mergerfs - 2.30.0-1

[marc0janssen]

trafficstars

-- Mergerfs only shows free space from first drive.

System information:

• OS, kernel version: Linux DS1513 3.10.108 #41890 SMP Fri Jun 25 02:39:14 CST 2021 x86_64 GNU/Linux synology_cedarview_1513+
• mergerfs version:

mergerfs version: merge-with-ng-1131-gfe90b72b FUSE library version: 2.9.7-mergerfs_2.30.0 fusermount version: 2.9.7-mergerfs_2.30.0 using FUSE kernel interface version 7.31

• mergerfs settings mergerfs -o nonempty,rw,use_ino,allow_other,func.getattr=newest,category.action=all,category.create=mfs,dropcacheonclose=true /volume1/video:/volume2/video2 /volume1/mergerfs/video

Filesystem Size Used Avail Use% Mounted on /dev/md0 2.3G 1.4G 845M 62% / devtmpfs 2.0G 0 2.0G 0% /dev tmpfs 2.0G 124K 2.0G 1% /dev/shm tmpfs 2.0G 20M 2.0G 2% /run tmpfs 2.0G 0 2.0G 0% /sys/fs/cgroup tmpfs 2.0G 2.2M 2.0G 1% /tmp /dev/mapper/cachedev_0 5.3T 2.0T 3.3T 38% /volume2 /dev/mapper/cachedev_1 7.9T 5.1T 2.9T 65% /volume1 shm 64M 0 64M 0% /volume1/@docker/containers/60a88b6ecb9e7306bfe005bfcb042fcd443e146d43aabf87d792d38359a11b13/mounts/shm 1/video:2/video2 14T 7.1T 6.1T 54% /volume1/mergerfs/video

[trapexit]

According to what you show here it looks correct to me. 5.3+7.9 ~= 14. 2.0+5.1 ~= 7.1. 3.3+2.9 ~= 6.1.

/dev/mapper/cachedev_0 5.3T 2.0T 3.3T 38% /volume2
/dev/mapper/cachedev_1 7.9T 5.1T 2.9T 65% /volume1
1/video:2/video2 14T 7.1T 6.1T 54% /volume1/mergerfs/video

[marc0janssen]

Yes seems so but macros reports 3TB On 10 Dec 2021, 15:10 +0100, trapexit @.***>, wrote:

According to what you show here it looks correct to me. 5.3+7.9 ~= 14. 2.0+5.1 ~= 7.1. 3.3+2.9 ~= 6.1. — You are receiving this because you authored the thread. Reply to this email directly, view it on GitHub, or unsubscribe.

[trapexit]

You are going to have to provide more detail. What is "macros"? As the ticket template asks... you should include all relevant information. You provided a df output that shows the filesystem reporting the proper values.

[marc0janssen]

Found the issue..

I am running this on a Synology... With Entware.

when I create a "shared folder" as mount point and point MergerFS to that mountpoint voor the combined volumes I get,

1. The correct free diskspace.
2. Errors when trying to view the setting for this "shared folder" if mergerfs is mounted
3. Errors when using Hyperback
4. Errors when backup config from the configsccreen in Synology

When I create a "shared folder" but now create a folder in there and use that as a mountpoint for the combined volumes I get:

1. Incorrect free disk space (this is the free space voor the shared folder alone, hence the mount is on there)
2. NO Errors when trying to view the setting for this "shared folder" if mergerfs is mounted
3. NO Errors when using Hyperback
4. NO Errors when backup config from the configsccreen in Synology

I know it walking on a thin line using this on a Synology... But is there a solution?

[trapexit]

I've zero experience with Synology. If something in the UI or whatever is reporting the size wrong you probably have things backwards. It's reporting the correct value for the wrong location. Not the wrong value for the correct location. I don't know anything about their software or setup so I really can't say how to resolve it.

[marc0janssen]

Ok I am on my own.... might find a solution.... thanks anyway! Have a nice day!

[trapexit]

You could try asking around some subreddits or something. homelab or datahoarders. I don't know where Synology folks hang out.

[marc0janssen]

Thanks!

[marc0janssen]

Hi Trapexit.... As I promised to find a solution.... here is one that works....

1. Configure mergerfs as noted in the wiki....
2. create a share in DSM ( I did "videom")
3. create a mount point in the Synology on /mnt (e.g. mkdir -p /mnt/videom)
4. do a bind mount between the two directories... (mount --bind /mnt/videom /volume1/videom)
5. INIT your desired MERGERFS with the mount on "/mnt/videom".

All problems with MERGERFS are done that way and you can still share it via DSM from Synology..

Here the script... If you wish I could edit your WIKI-page for you to reflex the full solution.

HAPPY NEW YEAR!!

` #!/bin/sh

echo "*** Init Mergerfs ***"

#Check and create mountpoint in /mnt if [ ! -d "/mnt/videom" ]; then mkdir -p /mnt/videom/ fi

#Mount --bind the two directories mount --bind /mnt/videom/ /volume1/videom/

#start Mergerfs modprobe fuse /opt/bin/mergerfs -o nonempty,rw,use_ino,allow_other,func.getattr=newest,category.action=all,category.create=mfs,dropcacheonclose=true /volume1/video:/volume2/video2 /mnt/videom `

[trapexit]

Feel free.