[Gluster-devel] Which subvolume comes first?

[Christopher Hawkins]

On a related note to [  RE: [Gluster-devel] The "df" command again  ], how
do you control which subvolume is connected to first? In my setup the client
always seems to want the second one (of two). Ie.:

#
volume afr
subvolumes server-a server-b
#

The client likes server-b. Is this always true, or how does that decision
get made?

Thanks, 
Chris

> -----Original Message-----
> From: 
> gluster-devel-bounces+chawkins=veracitynetworks.com at nongnu.org
>  
> [mailto:gluster-devel-bounces+chawkins=veracitynetworks.com at no
ngnu.org] On Behalf Of Brandon Lamb
> Sent: Thursday, May 01, 2008 9:03 PM
> To: Amar S. Tumballi
> Cc: Gluster Devel
> Subject: Re: [Gluster-devel] The "df" command again
> 
> On Thu, May 1, 2008 at 5:59 PM, Amar S. Tumballi 
> <amar at zresearch.com> wrote:
> > On Thu, May 1, 2008 at 5:37 PM, Brandon Lamb 
> <brandonlamb at gmail.com> wrote:
> > > Was there an option added somewhere to be able to choose 
> whether to 
> > > dispaly the least or most amount of disk space? I added 
> info on this 
> > > to the AFR things to know on the wiki, but I was 
> wondering if maybe 
> > > there was actually an option of how glusterfs displays that info.
> > >
> > There is no behavior option for 'df' in glusterfs. Its a 
> question of 
> > what is right. For example,
> > * unify shows unified space.
> > * stripe shows unified space.
> > * afr shows 'df' from one node.
> >
> > So, here we don't have any doubts about what to show in 
> case of unify 
> > and stripe. But in afr the question of which subvolume 
> comes. Earlier 
> > as user had the option of 'option replicate *' in afr, 
> showing the df 
> > of first subvolume made sense. But with uniform distribution of afr 
> > data now, we have to show the 'df' from the subvolume which 
> had minimum free disk.
> >
> > Currently 1.3.8 shows df from first subvolume. But, the 
> patch to show 
> > the 'df' from the subvolume with min free disk space has 
> gone into archive.
> 
> So to clarify, the wiki should be changed from
> 
> When doing a "df -h" on a client, the AVAILABLE disk space 
> will display the maximum disk space of the servers in the 
> cluster. So if you have two servers with 50 gigs and 100 gigs 
> of free disk space, you will see 100 gigs available even 
> though one server only has 50 gigs free
> 
> to this?
> 
> When doing a "df -h" on a client, the AVAILABLE disk space 
> will display the maximum disk space of the first AFR sub 
> volume defined in the spec file. So if you have two servers 
> with 50 gigs and 100 gigs of free disk space, and the server 
> with 100 gigs is listed first, then you will see 100 gigs 
> available even though one server only has 50 gigs free
> 
> 
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