Re: a big cluster or several small

[João Paulo Sacchetto Ribeiro Bastos <joaopaulosr95@xxxxxxxxx>]

Hello Marc,

In my beliefs that's exactly the main reason why people use Ceph: its gets more reliable the more nodes we put in the cluster. You should take a look in documentation and try to make use of placement rules, erasure codes or whatever fits your needs. I'm yet new in Ceph (been using for about 1 year) and I strongly tell you that your ideia just *may be* good, but may be a little overkill too =D

Regards,

On Mon, May 14, 2018 at 2:26 PM Michael Kuriger <mk7193@xxxxxxxxx> wrote:

The more servers you have in your cluster, the less impact a failure causes to the cluster. Monitor your systems and keep them up to date.  You can also isolate data with clever crush rules and creating multiple zones.

 

Mike Kuriger

 

From: ceph-users [mailto:ceph-users-bounces@xxxxxxxxxxxxxx] On Behalf Of Marc Boisis
Sent: Monday, May 14, 2018 9:50 AM
To: ceph-users
Subject: a big cluster or several small

 

Hi,

 

Hello,

Currently we have a 294 OSD (21 hosts/3 racks) cluster with RBD clients only, 1 single pool (size=3).

 

We want to divide this cluster into several to minimize the risk in case of failure/crash.

For example, a cluster for the mail, another for the file servers, a test cluster ...

Do you think it's a good idea ?

 

Do you have experience feedback on multiple clusters in production on the same hardware:

- containers (LXD or Docker)

- multiple cluster on the same host without virtualization (with ceph-deploy ... --cluster ...) 

- multilple pools

...

 

Do you have any advice?

 

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--

João Paulo Bastos
DevOps Engineer at Mav Tecnologia
Belo Horizonte - Brazil
+55 31 99279-7092

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