[Gluster-users] Gluster striping taking up too much space

Khawaja Shams kshams at usc.edu
Fri Jul 6 15:29:14 UTC 2012

   We are trying to create a 40 volume gluster across 4 machines. For the
purposes of our benchmarks, we are trying to set it up without any
replication. However, files are taking up 40 times the storage space than
we think. Putting out a 256MB file with dd puts a 9.2GB file on the file
system. The gluster FAQs claim that ls doesn't track the file space
properly and du does:

However, in our case, ls shows the file to be 256MB, while du shows it to
be 9.2GB. After looking at the individual drives, we also noticed that each
drive has 256MB of data and it seems to be getting replicated. Here is how
we create the volumes:

gluster create volume gluster-test stripe 40 transport tcp Gluster1:/data_f
Gluster1:/data_g Gluster1:/data_h Gluster1:/data_i Gluster1:/data_j
Gluster1:/data_k Gluster1:/data_l Gluster1:/data_m Gluster1:/data_n
Gluster1:/data_o Gluster2:/data_f Gluster2:/data_g Gluster2:/data_h
Gluster2:/data_i Gluster2:/data_j Gluster2:/data_k Gluster2:/data_l
Gluster2:/data_m Gluster2:/data_n Gluster2:/data_o Gluster3:/data_f
Gluster3:/data_g Gluster3:/data_h Gluster3:/data_i Gluster3:/data_j
Gluster3:/data_k Gluster3:/data_l Gluster3:/data_m Gluster3:/data_n
Gluster3:/data_o Gluster4:/data_f Gluster4:/data_g Gluster4:/data_h
Gluster4:/data_i Gluster4:/data_j Gluster4:/data_k Gluster4:/data_l
Gluster4:/data_m Gluster4:/data_n Gluster4:/data_o

gluster --version
*glusterfs 3.3.0 built on Jul  2 2012 23:26:48*
Repository revision: git://git.gluster.com/glusterfs.git
Copyright (c) 2006-2011 Gluster Inc. <http://www.gluster.com>
You may redistribute copies of GlusterFS under the terms of the GNU General
Public License.

We do not have this issue if all the bricks are on the same machine. What
are we doing wrong? Are there specific logs we should be looking at?

Thank you.
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