HAST + ZFS + NFS + CARP

[InterNetX - Juergen Gotteswinter]

Am 17.08.2016 um 10:53 schrieb Borja Marcos:
> 
>> On 17 Aug 2016, at 09:25, InterNetX - Juergen Gotteswinter <juergen.gotteswinter at internetx.com> wrote:
>> try dual split import :D i mean, zpool -f import on 2 machines hooked up
>> to the same disk chassis.
>>
>> kaboom, really ugly kaboom. thats what is very likely to happen sooner
>> or later especially when it comes to homegrown automatism solutions.
>> even the commercial parts where much more time/work goes into such
>> solutions fail in a regular manner
> 
> Well, don’t expect to father children after shooting your balls! ;)
> 
> I am not a big fan of such closely coupled solutions. There are quite
> some failure modes that can break such a configuration, not just a brainless
> “dual split import” as you say :)
> 
> Misbehaving software (read, a ZFS bug) can render the pool unusable and, no matter how many
> redundant servers you have connected to your chassis, you are toast. Using incremental replication
> over a network is much more robust, and it offers a lot of fault isolation. Moreover, you can place the
> servers in different buildings, etc.

in my case it was caused by rsf-1 cluster software

> 
> Networks even offer a more than reasonable protection from electrical problems. Especially if you get
> paranoid and use fiber, in which case protection is absolute.
> 
> 
> 
> Borja.
>