[Gluster-devel] Which subvolume comes first?
Krishna Srinivas
krishna at zresearch.com
Fri May 2 06:05:48 UTC 2008
On Fri, May 2, 2008 at 7:44 AM, Christopher Hawkins
<chawkins at veracitynetworks.com> wrote:
> 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?
The subvol specified first in the list is the first. There is no other decision
logic. How did you conclude your client likes server-b? :)
Krishna
>
> 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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> > Gluster-devel at nongnu.org
> > http://lists.nongnu.org/mailman/listinfo/gluster-devel
> >
>
>
>
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