[Gluster-users] Does Gluster Support "Dynamic Configuration of Stripe count" ?

[Subrata Ghosh]

Can you please help for  this. It is really becoming critical for us.

Regards,
Subrata


On 07/22/2014 04:45 PM, Subrata Ghosh wrote:
> Hi ,
>
> We are using GlusterFS in our product for DFS. We have  found an 
> issue  in using "striping" while experimenting with Striped Volumes in 
> our DFS infrastructure. We thought of  enable striping to support "Max 
> Files Size" when a file dynamically grows/shrink over time inside a 
> brick. We need to add more storage dynamically to handle this 
> situation and striped the file across bricks to fit it properly in 
> that striped volume .
>
> *Question*:  is  Does Gluster supports "dynamic configuration of 
> Stripe Count" (increment / decrement  stripe count) of Striping  
> currently  ?
>
> We tried with following two  basic experiments :
>
> 1. Create a volume with two bricks with stripe count 2 with no replica 
> ( to simplify ).
>
> 2. Add one more brick in that volume and increase stripe count by one 
> ( the stripe count becomes 3 now) .
>        - Seems it works  fine and files are being striped across 3 
> bricks as per specified chunk-size .
>
> 3. However faced issues while removing a brick from the volume and 
> decrement stripe count by one again ( so the stripe count becomes 2 again)
>     => Gluster is  not allowing to reduce the stripe count in this 
> scenario.
>
> Could you please help us by clarifying this.
>
> Thanks for your help
>
> Regards,
> Subrata Ghosh
> (Ericsson  R&D) 

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