[Gluster-devel] Which subvolume comes first?
Christopher Hawkins
chawkins at veracitynetworks.com
Fri May 2 02:14:51 UTC 2008
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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