March 16, 2015 at 7:49 AM
> To: Florent B
> Cc: "ceph-users@lists.ceph.com"
> Subject: Re: [ceph-users] [SPAM] Changing pg_num => RBD VM down !
>
>I'm using the latest Giant and have the same issue. When i increase
> PG_num of a pool from 2048 to 2148, my VMs is
il.com>>
Date: Monday, March 16, 2015 at 7:49 AM
To: Florent B mailto:flor...@coppint.com>>
Cc: "ceph-users@lists.ceph.com<mailto:ceph-users@lists.ceph.com>"
mailto:ceph-users@lists.ceph.com>>
Subject: Re: [ceph-users] [SPAM] Changing pg_num => RBD VM down !
I'
I'm using the latest Giant and have the same issue. When i increase PG_num
of a pool from 2048 to 2148, my VMs is still ok. When i increase from 2148
to 2400, some VMs die (Qemu-kvm process die).
My physical servers (host VMs) running kernel 3.13 and use librbd.
I think it's a bug in librbd with cr
May I know your ceph version.?. The latest version of firefly 80.9 has
patches to avoid excessive data migrations during rewighting osds. You may
need set a tunable inorder make this patch active.
This is a bugfix release for firefly. It fixes a performance regression
in librbd, an important CRUS
On 16/03/2015, at 12.23, Alexandre DERUMIER wrote:
>>> We use Proxmox, so I think it uses librbd ?
>
> As It's me that I made the proxmox rbd plugin, I can confirm that yes, it's
> librbd ;)
> Is the ceph cluster on dedicated nodes ? or vms are running on same nodes
> than osd daemons ?
My c
derumier"
Cc: "ceph-users"
Envoyé: Lundi 16 Mars 2015 12:35:11
Objet: Re: [ceph-users] [SPAM] Changing pg_num => RBD VM down !
On 03/16/2015 12:23 PM, Alexandre DERUMIER wrote:
>>> We use Proxmox, so I think it uses librbd ?
> As It's me that I made t
ent Bautista"
À: "aderumier"
Cc: "ceph-users"
Envoyé: Lundi 16 Mars 2015 11:14:45
Objet: Re: [ceph-users] [SPAM] Changing pg_num => RBD VM down !
On 03/16/2015 11:03 AM, Alexandre DERUMIER wrote:
> This is strange, that could be:
>
> - qemu crash, maybe
On 16/03/2015, at 11.14, Florent B wrote:
> On 03/16/2015 11:03 AM, Alexandre DERUMIER wrote:
>> This is strange, that could be:
>>
>> - qemu crash, maybe a bug in rbd block storage (if you use librbd)
>> - oom-killer on you host (any logs ?)
>>
>> what is your qemu version ?
>>
>
> Now, we
t;ceph-users"
Envoyé: Lundi 16 Mars 2015 10:11:43
Objet: Re: [ceph-users] [SPAM] Changing pg_num => RBD VM down !
Of course but it does not explain why VMs stopped...
That full system slows down, OK, but brutal stop...
On 03/14/2015 07:00 PM, Andrija Panic wrote:
changin PG
changin PG number - causes LOOOT of data rebalancing (in my case was 80%)
which I learned the hard way...
On 14 March 2015 at 18:49, Gabri Mate
wrote:
> I had the same issue a few days ago. I was increasing the pg_num of one
> pool from 512 to 1024 and all the VMs in that pool stopped. I came to
I had the same issue a few days ago. I was increasing the pg_num of one
pool from 512 to 1024 and all the VMs in that pool stopped. I came to
the conclusion that doubling the pg_num caused such a high load in ceph
that the VMs were blocked. The next time I will test with small
increments.
On 12:3
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