Gluster users - Apr 2011 - newbie questions.

Hi!

1. Possible create new volume by 'gluster' command stripe and replica 
simultaneously?
2. File stored on glusterfs can not be greater size than the brick?
3. I have two bricks of size 10G each. And 2 files of 4G each on one 
brick. Perform glusterfs self-balancing and migrate one file to another 
brick? I must/can do it "by hand"?

To begin, I think, that's enough. :)

WBR,
     Fyodor.

On 04/19/2011 09:20 AM, Fyodor Ustinov wrote:
> 1. Possible create new volume by 'gluster' command stripe and
replica
> simultaneously?
This came up at my job recently too.  I was surprised to find that,
although the code and the volfile syntax both support this, the CLI
syntax has no way to express it.
> 2. File stored on glusterfs can not be greater size than the brick?
Without striping, yes, the size of a file cannot be greater than the
(remaining) size of a brick - or the smallest of all replica bricks if
you're using replication.  IMO this is one of the main reasons to use
striping, since I've never seen it provide any performance benefit.
> 3. I have two bricks of size 10G each. And 2 files of 4G each on one 
> brick. Perform glusterfs self-balancing and migrate one file to another 
> brick? I must/can do it "by hand"?
It's probably better to let GlusterFS do the rebalancing if possible,
but it might not work with very small numbers of files.