[Gluster-devel] Architecture advice

[Daniel Maher]

Krishna Srinivas wrote:

> Daniel,
> Imagine 2 servers afred with each other. On the client side you
> configure HA translator with its subvols as the afrs on the two
> servers. (Previously we used DNS round robin system) If 1st server
> goes down, the HA translator will continue working with the second afr
> and this failover happens seamlessly.
[...snip...]
> If server1 goes down, the HA will continue operating using its
> connection with AFR2.
> 
> Was this clear?

Very clear, thank you. :)

I am curious to know how the client decides which of the subvols to use 
at any given time, and if there is a way to specify a "preferred" 
subvol.  For example, i have two servers AFR'ing each other.  I have two 
clients set up to access the AFR cluster via HA.  For reasons of 
resource distribution, i would like Client01 to prefer to use Server01, 
and Client02 to prefer to use Server02.

I took a peek through the (rc3) code for HA translator, but i didn't see 
any GF_OPTION_* declarations.  Likewise, the Translators_options page on 
the Wiki doesn't contain anything for HA.

Is this possible ?


-- 
Daniel Maher <dma+gluster AT witbe DOT net>