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

[Mauro Tridici]

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