Re: how many hosts could be down in a 12x(4+2) distributed dispersed volume?

[Mauro Tridici <mauro.tridici@xxxxxxx>]

Dear Sunil Kumar Acharya,

yes, I can confirm that I placed 2 bricks per subvolume per host.

Thank you very much for your support.

Regards,

Mauro tridici

Il giorno 20 set 2017, alle ore 09:34, Sunil Kumar Heggodu Gopala Acharya <sheggodu@xxxxxxxxxx> ha scritto:

Hi Mauro Tridici,

From the information provided it appears like you have placed 2 bricks of a subvolume on one host. Please confirm.

The number of hosts that could go down without losing access to data can be derived based on the brick configuration/distribution. Please let us know the brick distribution plan.

Regards,

Sunil kumar Acharya

Senior Software Engineer

Red Hat

T: +91-8067935170    

TRIED. TESTED. TRUSTED.

On Tue, Sep 19, 2017 at 1:09 AM, Mauro Tridici <mauro.tridici@xxxxxxx> wrote:

Dear All,

I just implemented a (6x(4+2)) DISTRIBUTED DISPERSED gluster (v.3.10) volume based on the following hardware:

- 3 gluster servers (each server with 2 CPU 10 cores, 64GB RAM, 12 hard disk SAS 12Gb/s, 10GbE storage network)

Now, we need to add 3 new servers with the same hardware configuration respecting the current volume topology.
If I'm right, we will obtain a DITRIBUTED DISPERSED gluster volume with 12 subvolumes, each volume will contain (4+2) bricks, that is a [12x(4+2)] volume.

My question is: in the current volume configuration, only 2 bricks per subvolume or one host could be down without losing data. What it will happen in the next configuration? How many hosts could be down without losing data?

Thank you very much.
Mauro Tridici

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