[Gluster-users] brick -- stripe -- disk usage?

[Joe Julian]

On 04/29/2013 10:12 AM, Kevin Abbey wrote:
> Hi,
> I created a a distribute stripe with 12 nodes, each with one brick. I 
> expected 6 pairs to be striped with the large files but what I see on 
> the actual brick is each file duplicated, ie. mirrored.  This is the 
> complete opposite of what I expected.  I expected half the large file 
> on one server and half on the second server.  This is to allow for 
> file sizes larger than an individual brick capacity.
>
> Is my configuration broken/misconfigured or am I completely 
> misunderstanding what I see happening?
>
>
> gluster mount
>
> /scratch/kabbey/bwa-out/testing
> -rw-r--r-- 1 kabbey staff 477G Apr 29 04:06 COLO_829.sam_sruno
>
>
>
> gluster nodes with the file:
>
> node01: -rw-r--r-- 2 kabbey staff 477G Apr 29 04:06 COLO_829.sam_sruno
> node02: -rw-r--r-- 2 kabbey staff 477G Apr 29 04:06 COLO_829.sam_sruno
>
>
>
>
>
>
>  gluster vol info
>
> Volume Name: scratch
> Type: Distributed-Stripe
> Volume ID: 3cc5a78d-9cc8-4324-9c00-6fab0a4ef14a
> Status: Started
> Number of Bricks: 6 x 2 = 12
> Transport-type: tcp,rdma
> Bricks:
> Brick1: node01-ib0:/export/brick1
> Brick2: node02-ib0:/export/brick1
> Brick3: node03-ib0:/export/brick1
> Brick4: node04-ib0:/export/brick1
> Brick5: node05-ib0:/export/brick1
> Brick6: node06-ib0:/export/brick1
> Brick7: node07-ib0:/export/brick1
> Brick8: node08-ib0:/export/brick1
> Brick9: node09-ib0:/export/brick1
> Brick10: node10-ib0:/export/brick1
> Brick11: node11-ib0:/export/brick1
> Brick12: node12-ib0:/export/brick1
> Options Reconfigured:
> cluster.stripe-block-size: 512KB
>
They're sparse files, only actually holding the stripes assigned to them.