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

Kevin Abbey kevin.abbey at rutgers.edu
Mon Apr 29 17:12:12 UTC 2013

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

-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
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

Thank you for any help,

Kevin Abbey
Systems Administrator
Center for Computational and Integrative Biology (CCIB)
Rutgers University - Science Building
315 Penn St.
Camden, NJ 08102
Telephone: (856) 225-6770
Fax:(856) 225-6312
Email: kevin.abbey at rutgers.edu

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