[Gluster-users] how many hosts could be down in a 12x(4+2) distributed dispersed volume?

[Sunil Kumar Heggodu Gopala Acharya]

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

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On Tue, Sep 19, 2017 at 1:09 AM, Mauro Tridici <mauro.tridici at cmcc.it>
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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