[Gluster-users] [Gluster-devel] AFR arbiter volumes

Ravishankar N ravishankar at redhat.com
Wed Sep 9 15:49:04 UTC 2015

On 09/09/2015 03:22 PM, wodel youchi wrote:
> Hi,
> I quite new on GlusterFS
> Since the arbiter does not hold any data, how to choose it's size 
> compared to the other 2 bricks?
> Regards

It depends on the maximum number of inodes (`df -i` )  any of the other 
2 normal bricks can hold. The recommended inode size is 512 bytes but 
since we store various gluster xattrs and possibly application's xattrs 
on the file, I think 8KB per file is a good estimate. So "8KB x max. no. 
of inodes "  should be good for the worst case. If you have some idea of 
the max. number of files you would actually be filling the bricks with, 
that multiplied by 8KB works too as a practical estimate.

I hope I've not made any oversight in these calculations.


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