[Gluster-users] adding a node

[JF Le Fillâtre]

Hello,

You cannot. As the message said, you cannot change the stripe count. So
you can add 4 bricks and you have a distributed + striped volume, but
you cannot change the stripe count by re-adding existing bricks into the
volume with a different stripe count, or by adding an additional brick
to the volume.

Your email isn't very clear; could you please send:
- the list of commands in the order that you typed them;
- the output of "gluster volume info" and "gluster volume status"

Thanks!
JF



On 16/03/15 16:17, Pierre Léonard wrote:
> Hi All,
> 
> I am note the alone guy having problem with the addition of a node to an
> existing distributed stripped or replicated volume.
> And  I never read a real solution.
> 
> My configuration is the following :
> 
>   * four node with a gvHome stripped 2 volume ;
>   * first I probe the new node ans its OK ;
>   * then I start to add the node:/brick to the four other and get the
>     answer that I have to add a multiple of the striped so 4 other node.
>     But I have only one ;
>   * So I try to make the addition from the new node. If I list the
>     volume on the new node it recognize the stripped volume. So I stop
>     the volume on the four and add :  gluster volume add-brick gvHome
>     stripe 2  boogy1:/mnt/gvHome/brick1  boogy2:/mnt/gvHome/brick1 
>     boogy3:/mnt/gvHome/brick1  boogy4:/mnt/gvHome/brick1 the answer is
>     the following :
> 
> [root at moody ~]# gluster volume add-brick gvHome stripe 2 
> boogy1:/mnt/gvHome/brick1  boogy2:/mnt/gvHome/brick1 
> boogy3:/mnt/gvHome/brick1  boogy4:/mnt/gvHome/brick1
> Changing the 'stripe count' of the volume is not a supported feature. In
> some cases it may result in data loss on the volume. Also there may be
> issues with regular filesystem operations on the volume after the
> change. Do you really want to continue with 'stripe' count option ?  (y/n) y
> volume add-brick: failed: Staging failed on boogy2. Error: Brick:
> boogy2:/mnt/gvHome/brick1 not available. Brick may be containing or be
> contained by an existing brick
> Staging failed on boogy3. Error: Brick: boogy3:/mnt/gvHome/brick1 not
> available. Brick may be containing or be contained by an existing brick
> Staging failed on boogy1. Error: Brick: boogy1:/mnt/gvHome/brick1 not
> available. Brick may be containing or be contained by an existing brick
> Staging failed on 138.102.172.94. Error: Brick:
> boogy4:/mnt/gvHome/brick1 not available. Brick may be containing or be
> contained by an existing brick
> 
> 
> So how to add node one by one ?
> 
> Many Thank's
> 
> sincerely
> 
> -- 
> Signature electronique
> INRA <http://www.inra.fr>
>  
> *Pierre Léonard*
> *Senior IT Manager*
> *MetaGenoPolis*
> Pierre.Leonard at jouy.inra.fr <mailto:Pierre.Leonard at jouy.inra.fr>
> Tél. : +33 (0)1 34 65 29 78
> 
> Centre de recherche INRA
> Domaine de Vilvert – Bât. 325 R+1
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> France
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> 
> 
> 
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-- 

 Jean-François Le Fillâtre
 -------------------------------
 HPC Systems Administrator
 LCSB - University of Luxembourg
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