[Gluster-users] Distributed volumes

Franco Broi franco.broi at iongeo.com
Tue Jun 3 08:22:16 UTC 2014 

On Tue, 2014-06-03 at 08:20 +0000, yalla.gnan.kumar at accenture.com
wrote: 
> Hi,
> 
> So , in which scenario, does the distributed volumes have files on both the bricks ?

If you make more than 1 file.

> 
> 
> -----Original Message-----
> From: Kaushal M [mailto:kshlmster at gmail.com] 
> Sent: Tuesday, June 03, 2014 1:19 PM
> To: Gnan Kumar, Yalla
> Cc: Franco Broi; gluster-users at gluster.org
> Subject: Re: [Gluster-users] Distributed volumes
> 
> You have only 1 file on the gluster volume, the 1GB disk image/volume that you created. This disk image is attached to the VM as a file system, not the gluster volume. So whatever you do in the VM's file system, affects just the 1 disk image. The files, directories etc. you created, are inside the disk image. So you still have just one file on the gluster volume, not many as you are assuming.
> 
> 
> 
> On Tue, Jun 3, 2014 at 1:09 PM,  <yalla.gnan.kumar at accenture.com> wrote:
> > I have created distributed volume,  created a 1 GB volume on it, and 
> > attached it to the VM and created a filesystem on it.  How to verify that the files in the vm are distributed across both the bricks on two servers ?
> >
> >
> >
> > -----Original Message-----
> > From: Franco Broi [mailto:franco.broi at iongeo.com]
> > Sent: Tuesday, June 03, 2014 1:04 PM
> > To: Gnan Kumar, Yalla
> > Cc: gluster-users at gluster.org
> > Subject: Re: [Gluster-users] Distributed volumes
> >
> >
> > Ok, what you have is a single large file (must be filesystem image??).
> > Gluster will not stripe files, it writes different whole files to different bricks.
> >
> > On Tue, 2014-06-03 at 07:29 +0000, yalla.gnan.kumar at accenture.com
> > wrote:
> >> root at secondary:/export/sdd1/brick# gluster volume  info
> >>
> >> Volume Name: dst
> >> Type: Distribute
> >> Status: Started
> >> Number of Bricks: 2
> >> Transport-type: tcp
> >> Bricks:
> >> Brick1: primary:/export/sdd1/brick
> >> Brick2: secondary:/export/sdd1/brick
> >>
> >>
> >>
> >> -----Original Message-----
> >> From: Franco Broi [mailto:franco.broi at iongeo.com]
> >> Sent: Tuesday, June 03, 2014 12:56 PM
> >> To: Gnan Kumar, Yalla
> >> Cc: gluster-users at gluster.org
> >> Subject: Re: [Gluster-users] Distributed volumes
> >>
> >>
> >> What do gluster vol info and gluster vol status give you?
> >>
> >> On Tue, 2014-06-03 at 07:21 +0000, yalla.gnan.kumar at accenture.com
> >> wrote:
> >> > Hi,
> >> >
> >> > I have created a distributed volume on my   gluster node. I have attached this volume to a VM on openstack. The size is 1 GB. I have written files close to 1 GB onto the
> >> > Volume.   But when I do a ls inside the brick directory , the volume is present only on one gluster server brick. But it is empty on another server brick.  Files are meant to be
> >> > spread across both the bricks according to distributed volume definition.
> >> >
> >> > On the VM:
> >> > --------------
> >> >
> >> > # ls -al
> >> > total 1013417
> >> > drwxr-xr-x    3 root     root          4096 Jun  1 22:03 .
> >> > drwxrwxr-x    3 root     root          1024 Jun  1 21:24 ..
> >> > -rw-------    1 root     root     31478251520 Jun  1 21:52 file
> >> > -rw-------    1 root     root     157391257600 Jun  1 21:54 file1
> >> > -rw-------    1 root     root     629565030400 Jun  1 21:55 file2
> >> > -rw-------    1 root     root     708260659200 Jun  1 21:59 file3
> >> > -rw-------    1 root     root     6295650304 Jun  1 22:01 file4
> >> > -rw-------    1 root     root     39333801984 Jun  1 22:01 file5
> >> > -rw-------    1 root     root     78643200000 Jun  1 22:04 file6
> >> > drwx------    2 root     root         16384 Jun  1 21:24 lost+found
> >> > ----------
> >> > # du -sch *
> >> > 20.0M   file
> >> > 100.0M  file1
> >> > 400.0M  file2
> >> > 454.0M  file3
> >> > 4.0M    file4
> >> > 11.6M   file5
> >> > 0       file6
> >> > 16.0K   lost+found
> >> > 989.7M  total
> >> > ------------------------
> >> >
> >> >
> >> > On the gluster server nodes:
> >> > -----------------------
> >> > root at primary:/export/sdd1/brick# ll total 12 drwxr-xr-x 2 root root 
> >> > 4096 Jun  2 04:08 ./ drwxr-xr-x 4 root root
> >> > 4096 May 27 08:42 ../ root at primary:/export/sdd1/brick#
> >> > --------------------------
> >> >
> >> > root at secondary:/export/sdd1/brick# ll total 1046536
> >> > drwxr-xr-x 2 root root       4096 Jun  2 08:51 ./
> >> > drwxr-xr-x 4 root root       4096 May 27 08:43 ../
> >> > -rw-rw-rw- 1  108  115 1073741824 Jun  2 09:35
> >> > volume-0ec560be-997f-46da-9ec8-e9d6627f2de1
> >> > root at secondary:/export/sdd1/brick#
> >> > ---------------------------------
> >> >
> >> >
> >> > Thanks
> >> > Kumar
> >> >
> >> >
> >> >
> >> >
> >> >
> >> >
> >> >
> >> >
> >> > -----Original Message-----
> >> > From: Franco Broi [mailto:franco.broi at iongeo.com]
> >> > Sent: Monday, June 02, 2014 6:35 PM
> >> > To: Gnan Kumar, Yalla
> >> > Cc: gluster-users at gluster.org
> >> > Subject: Re: [Gluster-users] Distributed volumes
> >> >
> >> > Just do an ls on the bricks, the paths are the same as the mounted filesystem.
> >> >
> >> > On Mon, 2014-06-02 at 12:26 +0000, yalla.gnan.kumar at accenture.com
> >> > wrote:
> >> > > Hi All,
> >> > >
> >> > >
> >> > >
> >> > > I have created a distributed volume of 1 GB ,  using two bricks 
> >> > > from two different servers.
> >> > >
> >> > > I have written 7 files whose sizes are a total of  1 GB.
> >> > >
> >> > > How can I check that files are distributed on both the bricks ?
> >> > >
> >> > >
> >> > >
> >> > >
> >> > >
> >> > > Thanks
> >> > >
> >> > > Kumar
> >> > >
> >> > >
> >> > >
> >> > >
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