Well, actually I am not concerned ONLY about mirroring the data, but with reliability on it.
Here during my lab tests I notice if I pull off a disk and then power on the server, the LVM crashes...
On the other hand, with ZFS even in degraded state the system booted normally.
The same happens with mdadm. That's the point.
---
Gilberto Nunes Ferreira
(47) 3025-5907
(47) 99676-7530 - Whatsapp / Telegram
Skype: gilberto.nunes36
Em qui., 30 de jul. de 2020 às 10:18, Alvin Starr <alvin@xxxxxxxxxx> escreveu:
LVM supports mirroring or raid1.________
So to create a raid1 you would do something like "lvcreate -n raidvol -L 1T --mirrors 1 /dev/bigvg"
You can add a mirror to an existing logical volume using lvconvert with something like "lvconvert --mirrors +1 bigvg/unmirroredlv"
But other than simple mirroring you will need mdadm.
On 7/30/20 8:39 AM, Gilberto Nunes wrote:
Doing some research and the chvg command, which is responsable for create hotspare disks in LVM is available only in AIX!I have a Debian Buster box and there is no such command chvg. Correct me if I am wrong....
---Gilberto Nunes Ferreira
(47) 3025-5907
(47) 99676-7530 - Whatsapp / Telegram
Skype: gilberto.nunes36
Em qui., 30 de jul. de 2020 às 02:05, Strahil Nikolov <hunter86_bg@xxxxxxxxx> escreveu:
LVM allows creating/converting striped/mirrored LVs without any dowtime and it's using the md module.
Best Regards,
Strahil Nikolov
На 28 юли 2020 г. 22:43:39 GMT+03:00, Gilberto Nunes <gilberto.nunes32@xxxxxxxxx> написа:
>Hi there....
>
>'till now, I am using glusterfs over XFS and so far so good.
>Using LVM too....
>Unfortunately, there is no way with XFS to merge two or more HDD, in
>order
>to use more than one HDD, like RAID1 or RAID5.
>My primary goal is to use two server with GlusterFS on top of multiples
>HDDs for qemu images.
>I have think about BTRFS or mdadm.
>Anybody has some experience on this?
>
>Thanks a lot
>
>---
>Gilberto Nunes Ferreira
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