[Ocfs2-users] OCFS2 over DRBDv8
Kilian CAVALOTTI
kilian.cavalotti at lip6.fr
Fri Aug 18 02:28:51 PDT 2006
On Thursday 17 August 2006 23:12, Alexei_Roudnev wrote:
> I advice against it. Even if it is possible, you definitkly will run
> into DRBD/o2cb conflict in case of any network glitch,
> and will have all your nodes self-fencing.
I'm not sure to understand the reasons of the conflict. In case of network
failure, DRBD goes split-brain, and interrupts its synchronization
procedures until manual recovery. In the mean time, o2cb will have
detected the problem and fenced both nodes. Each node will operate in
disconnected mode, that's expected behaviour, but why would DRBD and o2cb
conflict? May you please give more details?
> In addition, DRDB is not fast
> enough for OCFSv2 default settings.
May I ask why? DRBD speed is all about the interconnect link, isn't it? And
with a GbE link, which outperforms most of the not-so-new IDE/SATA
controllers, I'd appreciate any insights about how DRBD could be not fast
enough for OCFS2.
> Through, it all may be very interesting to discover in the lab.
That's actually the case, I'm not planning to base any real-world service
on such an infrastructure for now. That's more of a playground,
actually. :)
--
Kilian CAVALOTTI Administrateur réseaux et systèmes
UPMC / CNRS - LIP6 (C870)
8, rue du Capitaine Scott Tel. : 01 44 27 88 54
75015 Paris - France Fax. : 01 44 27 70 00
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