[Gluster-users] gluster replica 3 with third less powerful machine

[Andreas Kirbach]

The last brick(s) in a replica set will be the arbiter brick(s).

https://docs.gluster.org/en/latest/Administrator%20Guide/arbiter-volumes-and-quorum/
---
For example:
# gluster volume create testvol replica 2 arbiter 1 
server{1..6}:/bricks/brick
volume create: testvol: success: please start the volume to access data

This means that for every 3 bricks listed, 1 of them is an arbiter. We 
have created 6 bricks. With a replica count of three, each 3rd brick in 
the series will be a replica subvolume. Since we have two sets of 3, 
this created a distribute subvolume made of up two replica subvolumes.
---

Am 21.10.2020 um 13:41 schrieb Gilberto Nunes:
>  >> I would use the thord system as an arbiter which stores only 
> metadata of the file , but no data.
> Yep! But it's not clear to me how gluster will pick up the third node to 
> be an arbiter...
> Is there any parameter to pass during volume creation or just replica 1 
> and than gluster will analyze the hosts and then pick up the less powerful?
> Sorry for newbie question...
> 
> Thanks
> ---
> Gilberto Nunes Ferreira
> 
> 
> 
> 
> 
> 
> Em qua., 21 de out. de 2020 às 07:31, Strahil Nikolov 
> <hunter86_bg at yahoo.com <mailto:hunter86_bg at yahoo.com>> escreveu:
> 
>     I would use the thord system as an arbiter which stores only
>     metadata of the file , but no data.
>     For such systems , SSDs are most optimal.
> 
> 
>     Best Regards,
>     Strahil Nikolov
> 
> 
> 
> 
> 
> 
>     В вторник, 20 октомври 2020 г., 16:53:59 Гринуич+3, Gilberto Nunes
>     <gilberto.nunes32 at gmail.com <mailto:gilberto.nunes32 at gmail.com>>
>     написа:
> 
> 
> 
> 
> 
>     Hi
> 
>     I have 3 servers but the third one is a very low machine compared to
>     the 2 others servers.
>     How could I create a replica 3 in order to prevent split-brain, but
>     tell the gluster to not use the third node too much???
>     I hope I can make myself understandable.
> 
>     Thanks
> 
>     ---
>     Gilberto Nunes Ferreira
> 
> 
> 
> 
> 
>     ________
> 
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> 
> 
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> 
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