[Gluster-users] Problem adding brick to an existing volume

[Ravishankar N]

On 04/28/2015 05:14 PM, Atin Mukherjee wrote:
>
> On 04/28/2015 04:41 PM, Oliver wrote:
>> Hi Gluster Users,
>>
>> I am hoping that someone can help me put me on the right track maybe ..
>>
>> Objective is to have a high available, extensible storage cluster with a
>> fair rate of redundancy.
>>
>> I was thinking of a cluster of multiple machines, starting with 2
>> servers, 2 disks each and a config of
>>
>> Volume Name: originals
>> Type: Distributed-Replicate
>> Volume ID: xx
>> Status: Started
>> Number of Bricks: 2 x 2 = 4
>> Transport-type: tcp
>>
>> Volume: originals
>> Brick srv1:/srv/vol1 (/dev/sdb1 500GB)
>> Brick srv1:/srv/vol2 (/dev/sdc1 500GB)
>> Brick srv2:/srv/vol1 (/dev/sdb1 500GB)
>> Brick srv2:/srv/vol2 (/dev/sdb1 500GB)
>>
>> Now I would like to add another server with JUST 1 500GB disk, peer
>> probe and everything is fine so far, but when it comes to adding the brick:
>>
>> root at srvdst01:~# gluster volume add-brick videos srv3:/srv/vol1
>> volume add-brick: failed: Incorrect number of bricks supplied 1 with
>> count 2
>>
>> Ok, trying to change the num of replica's or whatever just results in
>>
>> root at srvdst01:~# gluster volume add-brick videos replica 3
>> srv3:/srv/vol1 (or vol3 or vol4, this doesnt matter)
>> volume add-brick: failed: Operation failed
>>
>> No way to get around this .. What do I have to do ? Add two bricks in 1
>> command ? How would it work in the future when I gets to production
>> machines with each 2 or even more disks ?
> Since the existing configuration is 2 X 2 and if you are willing to
> continue to make this volume a distribute-replicate one, you should add
> two bricks saying gluster v add-brick videos replica 2 <brick1> <brick2>
>
> However, I think you could still convert it from replica 2 to replica 3
> with the command what you attempted. Can you share the glusterd log file
> of all the nodes to debug it further.


If you are trying to convert it to replica 3, it is "gluster vol 
add-brick <volname> replica 3 <brick1> <brick2>"
If you want to add another distribute leg, "gluster vol add-brick 
<volname> <brick1><brick2>"

-Ravi
> Adding Ravi in cc.
>
> ~Atin
>> Were great someone could gimme a hint.
>>
>> Its gluster 3.4.2-1ubuntu1 amd64 on ubuntu 14.04 LTS.
>>
>> regards, Oliver
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