Re: How much disk can fail after a catastrophic failure occur?

[Gilberto Ferreira <gilberto.nunes32@xxxxxxxxx>]

Ok! I got it about how many disks I can lose and so on.

But regard the arbiter isse, I always set this parameters in the gluster volume, in order to avoid split-brain and I might add that work pretty well to me.
I already have a Proxmox VE cluster with 2 nodes and about 50 vms, running different Linux distro - and Windows as well - with Cpanel and other stuff, in production.

Anyway here the parameters I had have used:

gluster vol set VMS cluster.heal-timeout 5
gluster vol heal VMS enable
gluster vol set VMS cluster.quorum-reads false
gluster vol set VMS cluster.quorum-count 1
gluster vol set VMS network.ping-timeout 2
gluster vol set VMS cluster.favorite-child-policy mtime
gluster vol heal VMS granular-entry-heal enable
gluster vol set VMS cluster.data-self-heal-algorithm full
gluster vol set VMS features.shard on
gluster vol set VMS performance.write-behind off
gluster vol set VMS performance.flush-behind off

 

---

Gilberto Nunes Ferreira

Em dom., 20 de out. de 2024 às 17:34, Strahil Nikolov <hunter86_bg@xxxxxxxxx> escreveu:

If it's replica 2, you can loose up to 1 replica per distribution group.

For example, if you have a volume TEST with such setup:

server1:/brick1
server2:/brick1
server1:/brick2
server2:/brick2

You can loose any brick of the replica "/brick1" and any brick in the replica "/brick2". So if you loose server1:/brick1 and server2:/brick2 -> no data loss will be experienced.
As usual, consider if you can add an arbiter for your volumes.

Best Regards,
Strahil Nikolov

В събота, 19 октомври 2024 г. в 18:32:40 ч. Гринуич+3, Gilberto Ferreira <gilberto.nunes32@xxxxxxxxx> написа:

Hi there.

I have 2 servers with this number of disks in each side:

pve01:~# df | grep disco
/dev/sdd          1.0T  9.4G 1015G   1% /disco1TB-0
/dev/sdh          1.0T  9.3G 1015G   1% /disco1TB-3
/dev/sde          1.0T  9.5G 1015G   1% /disco1TB-1
/dev/sdf          1.0T  9.4G 1015G   1% /disco1TB-2
/dev/sdg          2.0T   19G  2.0T   1% /disco2TB-1
/dev/sdc          2.0T   19G  2.0T   1% /disco2TB-0
/dev/sdj          1.0T  9.2G 1015G   1% /disco1TB-4

I have a Type: Distributed-Replicate gluster

So my question is: how much disk can be in fail state after losing data or something?

Thanks in advance

---

Gilberto Nunes Ferreira

 

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