[Gluster-users] Adding brick to existing glusterfs setup

[Major Hayden]

I'm using GlusterFS with four bricks and RAID 1 replication.  It's been working very well for me.

If you do add in a new brick, you'll have to run an ls -alR as James suggested.  That will ensure that your new brick is synchronized with the other bricks.  This may take some time to complete depending on the number of files, size of the files, and the network links between your servers.

--
Major Hayden
major at mhtx.net

On Jun 3, 2010, at 6:53, Burnash, James wrote:

> Hi Adrian,
> 
> I think you have two issues (and I'm sure someone can correct me if I'm mistaken)
> 
> 1) At least when you use the volgen utility (in the 3.x Gluster versions) to create the config files and define RAID=1, it insists on pairs of bricks to implement this. While there is nothing that precludes multiple mirrors for RAID 1, I'm not sure Gluster accommodates that config. I may be completely wrong about this, but that has been my experience so far.
> 
> 2) If Gluster does support multiple RAID 1 mirrors, you would need to do a 'ls -LR' on the top level directory of the glusterfs mount point to let Gluster see all the files and replicate accordingly. I think.
> 
> I've only answered this in the hope that it may help you get started looking at the problem before most of the other mailing list users get in for work - I'm on an early shift here.
> 
> James Burnash
> 
> -----Original Message-----
> From: gluster-users-bounces at gluster.org [mailto:gluster-users-bounces at gluster.org] On Behalf Of Adrian Moisey
> Sent: Thursday, June 03, 2010 7:44 AM
> To: gluster-users at gluster.org
> Subject: [Gluster-users] Adding brick to existing glusterfs setup
> 
> Hi
> 
> I've got a rather simple glusterfs setup.
> I've got 2 servers which export a brick each, and those 2 servers mount
> those bricks with cluster/replicate in order to RAID1 them.
> 
> I am using gluster 2.0.6.
> 
> Server config:
> ---->8---->8---->8---->8---->8---->8---->8---->8----
> volume posix
>  type storage/posix
>  option directory /export/
> end-volume
> 
> volume locks
>   type features/locks
>   subvolumes posix
> end-volume
> 
> volume cache
>   type performance/io-cache
>   subvolumes locks
> end-volume
> 
> volume brick
>   type performance/io-threads
>   option thread-count 8
>   subvolumes cache
> end-volume
> 
> ### Add network serving capability to above brick.
> volume server
>  type protocol/server
>  option transport-type tcp
>  subvolumes brick
>  option auth.addr.brick.allow * # Allow access to "brick" volume
> end-volume
> ---->8---->8---->8---->8---->8---->8---->8---->8----
> 
> Client config:
> ---->8---->8---->8---->8---->8---->8---->8---->8----
> ### Add client feature and attach to remote subvolume of server1
> volume brick1
>  type protocol/client
>  option transport-type tcp
>  option remote-host 172.19.45.102      # IP address of the remote brick
>  option remote-subvolume brick        # name of the remote volume
> end-volume
> 
> ### Add client feature and attach to remote subvolume of server2
> volume brick2
>  type protocol/client
>  option transport-type tcp
>  option transport-timeout 5
>  option remote-host 172.19.45.103      # IP address of the remote brick
>  option remote-subvolume brick        # name of the remote volume
> end-volume
> 
> volume replicate
>  type cluster/replicate
>  subvolumes brick1 brick2
> end-volume
> ---->8---->8---->8---->8---->8---->8---->8---->8----
> 
> My problem is that I would like to add a third server with a third brick
> in order to RAID1 across all 3 servers.
> 
> How do I go about doing this? I've managed to add it, but the old files
> aren't being replicated to the new one.
> 
> --
> Adrian Moisey
> Systems Designer | CareerJunction | Better jobs. More often.
> Web: www.careerjunction.co.za | Email: adrian at careerjunction.co.za
> Phone: +27 21 818 8621 | Mobile: +27 82 858 7830 | Fax: +27 21 818 8855
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