[Gluster-users] Fwd: AFR questions

[Raghavendra G]

Hi Stas,
Please find the comments inlined.

2008/12/7 Stas Oskin <stas.oskin at gmail.com>

>
>
> ---------- Forwarded message ----------
> From: Stas Oskin <stas.oskin at gmail.com>
> Date: 2008/12/7
> Subject: Re: [Gluster-users] AFR questions
> To: Kirby Zhou ‏kirbyzhou at sohu-rd.com‏
>
>
> Hi.
>
>  For example:
>>
>> volume ns-afr0
>>  type cluster/afr
>>  subvolumes remote-ns1 remote-ns2 remote-ns3 remote-ns4
>> end-volume
>>
>> Anything written to ns-afr0 will be AFRed to all the 4 subvolumnes.
>> So  how many copies you want to get, how many subvolumnes you should set.
>
>
> Thanks for the example.
>
> By this approach  you mean that basically the only way to define 2-way
> replication for example, is to put 2 bricks inside a volume?
> What if I have say 10 bricks and still need only 2 copies? I will need to
> define such sub-volumes for each pair?
>

you can have two unify of 5 bricks each and have these two as children of
afr. something like,

volume unify-0
type cluster/unify
subvolumes n1 n2 n3 n4 n5
end-volume

volume unify-1
type cluster/unify
subvolumes n6 n7 n8 n9 n10
end-volume

volume afr
type cluster/afr
subvolumes unify-0 unify-1
end-volume


>
> This sounds a bit strange, because then you basically limited to 2 servers
> instead of to the whole server pool.
>
> Is it possible just to add all available bricks to list, then specify how
> many copies to store?
>
> Regards.
>
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>
>


-- 
Raghavendra G
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