Unlock VDO in cockpit !

[Emad R]

Use Centos 7.5 only or higher

yum install vdo kmod-kvdo
yum install cockpit cockpit-storaged
systemctl start cockpit
systemctl enable cockpit.socket

https://IP:9090/storage

Picture Story Time

[Emad R]

@emad-r

Bad VDO remove it :

vdo remove --force --name=vdoasync

Check stats:

vdostats --verbose /dev/mapper/vdoasync |grep -B6 'saving percent'

[Emad R]

@emad-r

Also dont use EXT4 with VDO

ext4lazyinit will thrash the logical disks stupidly

[black3dynamite]

@emad-r said in Unlock VDO in cockpit !:

@emad-r

Also dont use EXT4 with VDO

ext4lazyinit will thrash the logical disks stupidly

Use XFS instead?

[Emad R]

@black3dynamite said in Unlock VDO in cockpit !:

@emad-r said in Unlock VDO in cockpit !:

@emad-r

Also dont use EXT4 with VDO

ext4lazyinit will thrash the logical disks stupidly

Use XFS instead?

VDO uses LVM for some parts I thought you can shrink volume but even with EXT4 that option is not avialable, so no need for EXT4 and yes you can use XFS it is faster and makes the drives ready from the start without any thrashing.

[Emad R]

@emad-r

Now where does VDO lies

| / | /var | /usr | /home  |
 --------------------------
|       LVM Volume         |
 --------------------------
|       RAID Device        |
 --------------------------
| Disk 1 | Disk 2 | Disk 3 |

Also if your having mount issues on boot for boot devices add this is nano /etc/fstab

Replace defaults with:

defaults,discard,x-systemd.requires=vdo.service 0 0

[Emad R]

@emad-r

The VDO module requires 370 MB plus an additional 268 MB per each 1 TB of physical storage managed.
The Universal Deduplication Service (UDS) index requires a minimum of 250 MB of DRAM.

https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/7/html/storage_administration_guide/vdo-qs-requirements#vdo-ig-index-reqts

[Emad R]

@emad-r

RAID --> VDO --> LVM ?

[black3dynamite]

@emad-r said in Unlock VDO in cockpit !:

@emad-r

RAID --> VDO --> LVM ?

[black3dynamite]

RAID > block device > VDO