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

[Joe Julian]

To you have single files that exceed brick sizes which grow and shrink?

On July 22, 2014 10:02:16 PM PDT, Subrata Ghosh <subrata.ghosh at ericsson.com> wrote:
>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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